[TANKS] Model this

[Mike Lyons]

We have a new performance benchmark:
https://twitter.com/holdmyale/status/1324549895282446338?s=20  

 

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Re: [TANKS] tank battles in 2018 ?

[Mike Lyons]

David and I are generally available Saturday afternoons and Sundays 
throughout the summer.

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Re: [TANKS] "The Tank Farm" in Nokesville, VA, 24 - 25 September 2016

[Mike Lyons]

A great day!
Beautiful weather, lots of people attended the event and we had around 200 
kid-visits (many repeaters) at our activity.

Frank and John set up half a dozen silhouette targets of tanks and 
vehicles, plus one of an ambulance, and a post with 6 circular targets.
A couple of shooters hit the ambulance and had to perform The Walk of Shame 
to go wipe it off.

John had kids taking 10 shots each with the Navarone Gun 
.
Prizes were awarded for the most hits in the shortest time each hour, plus 
instant prizes for first-shot hits on the post targets.

Frank had kids occasionally driving the Semovente 
 to attract 
visitors when things were quiet (which wasn't often)
and was promoting the hobby to anyone who would listen.
Several adults were very interested in (and many more just amused by) the 
R/C Tank Combat concept.

David and his buddy Dean had kids working Bazooka Joe 
 while 
I oversaw Len Opie 
.
Kids were allowed 3 shots on each and about 75% were able to hit one of the 
closer targets.
Some of the best shooters were young girls.

Bazooka Joe's marker locked up after about 100 rounds.
I suspect it got liquid CO2 in there and something broke and jammed the 
bolt open.
I need to rearrange the layout so I can tilt the bottle.

Len Opie had a new rotate servo mechanism installed the night before and 
ran flawlessly* all day,
on a single set of 4 AA batteries for the R/C receiver and 3 servos, for an 
estimated 500 rounds.
* I had to manually cock the marker a little each time because it wouldn't 
fully cock with the trigger depressed.
I was using a toggle switch to fire and separate joysticks for rotate and 
elevate.
Unless the toggle switch was rapidly reset it caused the problem.
Not a big deal for a single-shot asset.
A momentary pushbutton switch on the R/C transmitter would solve the 
problem 
but I plan to build a custom control box as used with RL001.

At the end of the day the closer targets were almost completely covered in 
paintball goo.

When a pair of 12ish boys came back for their third time through I asked if 
they had seen everything else.
They told me "*Yeah, but this is the coolest thing here.*"
This at an event with dozens of armored vehicles, many other vehicles, a 
helicopter to sit in, horse cavalry,
working dogs, lots of people in uniform with weapons, LEGO building, tank 
demos, flamethrower demos, and more!

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Re: [TANKS] "The Tank Farm" in Nokesville, VA, 24 - 25 September 2016

[Mike Lyons]

Bazooka Joe and Len Opie will be there.
David and 1+ fellow Boy Scouts will assist guests with the bazookas. 

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[TANKS] Multiple receivers for one 2.4 GHz transmitter

[Mike Lyons]

I believe T040  and 
the new SCC field gun
have two independent R/C receivers
operated from a single transmitter.

Is this possible using the "latest and greatest" 2.4 GHz technology
where a receiver is "bound" to a transmitter using a little dongle
and the receiver retains that binding?

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[TANKS] Re: A Great Day

[Mike Lyons]

Memorable exchange during team selection:

Frank: "*Josh, Isaac, which of you is older?*"
Josh (or Isaac): "*We're twins.*"
Chorus: "*Answer the question!*"

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[TANKS] Re: A Great Day

[Mike Lyons]

Next time just sign the papers and pay the fees.


On Saturday, August 13, 2016 at 9:07:50 PM UTC-4, Caleb Smith wrote:
>
> ... 
>
Frank tried to inform me that there were papers to sign and fees to 
> pay..etc etc and couldn't be battled today 
>
... 
>
(There is a long story behind why the original marker could not be used, 
> but to be brief, don't leave CA around when Frank is fixing a marker.)
> ...
>

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[TANKS] Re: Asset Recovery Team

[Mike Lyons]

If you are traveling with chickens, make sure that your own mask is on 
first before helping your chickens.

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Re: [TANKS] Rookie primer

[Mike Lyons]

https://www.youtube.com/watch?v=OzfW88gCKo4=22

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[TANKS] Re: suggestion to help newcomers

[Mike Lyons]

Correction: We are staying at the Best Western in *Shippensburg*.

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[TANKS] Re: Asset Recovery Team

[Mike Lyons]

From: Asset Surveillance Section
To: Commander, Burpleson AFB
Re: Surveillance report

TOP SECRET

Our cultural attache in Annapolis has obtained a secret video recording of 
a recent Tri-Pact planning session.
BEGIN ROT13 ENCRYPTION
uggc://jjj.lbhghor.pbz/rzorq/4ek8ETN2DTt?ery=0=1
END ROT13 ENCRYPTION

Respectfully,
  F. Latulence, OOD SIGINT OPSEC TPP DUI ROFL

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[TANKS] Grill

[Mike Lyons]

No need for a grill.
Just drape your steaks over your tank's barrel for a few seconds
... or your motors if you've burned them out.


On Saturday, August 6, 2016 at 3:34:48 PM UTC-4, su100t34 wrote:
>
> Any news on the status of the grill? I can bring my portable grill. 
> Propane too.
>

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[TANKS] Re: suggestion to help newcomers

[Mike Lyons]

Excellent idea!
I suggest the flags be easily removable so a "dead" tank is clearly 
identified.
In the past Bazooka Joe has wasted valuable time shooting at tanks 
returning to base with the operator some distance away.


On Monday, August 1, 2016 at 10:14:01 PM UTC-4, jvragu47 wrote:
>
> Maybe something like a commanders flag?  some wire duct taped to the tank 
> with a  team color at the top?  say a thin piano wire maybe. Marking the 
> operator might not work as well when the melees occur.
>

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[TANKS] Re: suggestion to help newcomers

[Mike Lyons]

The squiggly lines delineate adjacent expected paintball splats.


On Wednesday, August 3, 2016 at 8:19:28 PM UTC-4, jvragu47 wrote:
>
> ... And if you're on the OPFOR, I'll help with the final coat of paint. ...
>

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[TANKS] Re: suggestion to help newcomers

[Mike Lyons]

We are staying at the Best Western in Chambersburg.  It has very good 
ratings and a pool.

If you want to earn $15 for booking at any hotel through booking.com for a 
stay before September 30 try this: https://refer.booking.com/s/6ezm5
I don't know how they pay out the $15.


On Wednesday, August 3, 2016 at 9:24:32 AM UTC-4, Mitch Anderson wrote:
>
> ...
> Is there a local motel where more tankers congregate? 
> ...
>

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Re: [TANKS] "The Tank Farm" in Nokesville, VA, 24 - 25 September 2016

[Mike Lyons]

We plan to go on Sunday.
We will bring rocket launcher/s if RCTC has the usual shooting gallery.

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[TANKS] New weapons platform

[Mike Lyons]

Lyons Labs has developed the Rocket Launcher, M20A1B1C1D1 0.68 inch
on behalf of our client the National Union of Traumatized Squirrels
in response to the recent deadly attack 
.

While unwilling to identify any suspects by name
our client did ask us to pay particular attention to the video at the 1:35 
mark.
Our bazooka operators have been warned accordingly.


On Sunday, July 17, 2016 at 8:06:13 PM UTC-4, jvragu47 wrote:
>
> ... They also uncovered the latest asset from Mr. Lyons and Co.  Herr 
> General, I believe that we need a ruling on this new weapons platform. 
> Since they are willing to work for peanuts, this could severely impact the 
> balance of power. No longer will combatants be required to spend vast sums 
> of money to keep pace with Tri-Pact.
>
...
>

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[TANKS] Re: August Tank Battle

[Mike Lyons]

So far that weekend looks good for Bazooka Joe and hopefully one or two 
more rocket launchers.

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[TANKS] Video: Servos, steppers, encoders

[Mike Lyons]

A neat video intro to some different options for motor control:
https://youtu.be/5thxBgew7N  

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[TANKS] Re: Small Markers

[Mike Lyons]

On Thursday, October 15, 2015 at 3:54:22 PM UTC-4, neroc1 wrote:
>
> ... Your completed Locust (if the same as mine) will be about 22 inches 
> long. I can pop mine under one arm and walk around with it. ...
>

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[TANKS] Americans in Wartime Museum Open House 2015

[Mike Lyons]

The AMW at the "Tank Farm" in Nokesville, VA will be held October 3 & 4.

Is there any interest in having an RCTC activity as we have done in some 
years past?
The Sunday would work better for the Lyons clan in order to avoid soccer x 
3.

P.S. Even if we don't officially do something I recommend the event.
*Lots* of tanks and other vehicles, most in working condition.
If you are interested in building a model of a tank they have
there is nothing better than actually seeing the thing in person.

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Re: [TANKS] $1.398 ransom

[Mike Lyons]

David and I will be there around 9am on Sunday.
We are bringing a ringer from Deutschland.

We'll bring snacks, cookies, etc.

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Re: [TANKS] $1.398 ransom

[Mike Lyons]

DOD http://www.rctankcombat.com/teams/DOD/ scientists have analyzed the 
forensic evidence
and have determined the object in question
is an Incendiarizing Edible Doohickey,
intended to accelerate the Maillard reaction
when processing tubesteaks, coneys, and other quality proteins.

The investigative process unfortunately required complete demolition
of the the device and the grill so an alternative heat source will be 
required 
for those who prefer their nitrated meat products above ambient temperature.
The Atlantic City casinos not affiliated with one D. Trump
are now accepting bets as to which which MAG tank will be the first
to catch fire and host the weenie roast.

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[TANKS] Re: two-day tank battle in July or August ?

[Mike Lyons]

No can do, swim team functions.


On Thursday, July 2, 2015 at 10:07:33 AM UTC-4, Joe Sommer wrote:

 ...

 

 Mike,

 Any chance that 7/25 and/or 7/26 could work?

 Joe

  


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[TANKS] Re: add-on track idea?

[Mike Lyons]

They are called recessed bumpers, or just bumpers.


On Sunday, July 12, 2015 at 11:03:26 PM UTC-4, odyssey...@aol.com wrote:
...

  what i thought was interesting was what they attached to the ground side 
 of the tracks for additional grip (i don't know the exact name, but..) 

... 

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[TANKS] Re: two-day tank battle in July or August ?

[Mike Lyons]

The 2nd, 3rd, or 4th weekends of August would work for the Lyons clan.

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Re: [TANKS] Small Fry fiberglass hull

[Mike Lyons]

You want Small Frys with that?
(As the engineering graduate said)


On Sunday, March 29, 2015 at 7:17:59 AM UTC-4, Joe Sommer wrote:

 Only a second hull?  I am ready to order ten and flood the battlefield
 with Small Fry clones. 


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Re: [TANKS] fiberglass question

[Mike Lyons]

From the distant depths of my memory it appears that reinforcements are 
like girlfriends:
- Boring = cheap
- Sexy = expensive


On Tuesday, March 24, 2015 at 6:19:41 PM UTC-4, Frank Pittelli wrote:

 Dowel == Boring 

 Carbon Fiber == Sexy 


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Re: [TANKS] fiberglass question

[Mike Lyons]

I made something very similar, but for the broad plane surfaces I made ribs 
using thin dowel covered with a couple of layers of cloth.  I borrowed this 
technique from kayaks where (at least many years ago) it was common to lay 
a piece of hose covered in cloth to form the keel.

On Saturday, March 21, 2015 at 10:42:55 AM UTC-4, Frank Pittelli wrote:

 ... If you think flexing will be a problem on a flat section (like the 
 top), use 
 carbon fiber cloth in those areas to stiffen them. 

... 

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Re: [TANKS] fiberglass question = PVA spray

[Mike Lyons]

I was curious about PVA spray and stumbled across this: 
http://www.westsystem.com/ss/assets/Uploads/PVAhairspray.pdf
Use at your own risk.

On Saturday, March 21, 2015 at 10:42:55 AM UTC-4, Frank Pittelli wrote:

 ... Finally, spray two  light coats of PVA on the surface ...

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[TANKS] Re: what cleaner ?

[Mike Lyons]

The process is easier if you apply some ethanol and reduce the temperature.
See this demonstration https://www.youtube.com/watch?v=v7jia1kOi-o .

Highlight the text between the lines for detailed directions

1. Write check.
2. Add cooling elements to vessel.
3. Add ethanol to vessel.
4. Drain vessel.
5. Give check to cleaning person.



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[TANKS] Re: o/t - what is it?

[Mike Lyons]

Use Chrome browser.
Right-click on image.
Select Search Google for this image.

OR

In some other browser:
Right-click the image and copy its URL.
Browse to www.google.com.
At upper right click Images.
On next page click the camera icon in the search box to Search by image.
Paste the URL you copied earlier.


Late update:
The above two processes produce different results.  Whaaa???
In this instance the Chrome browser results seem more useful.
Your mileage may vary.

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[TANKS] Re: Pittelli Prize

[Mike Lyons]

New link (old one went away): https://www.youtube.com/watch?v=2TnkJ8_BmSI

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Re: [TANKS] Re: Remote kill switch

[Mike Lyons]

Then we need to solve the correct problem.
I propose a remote-controlled device be attached to each operator
with the capability to remove said operator from the control process.

For testing purposes the phasers should be set to Stun.


On Monday, November 17, 2014 12:36:57 PM UTC-5, Frank Pittelli wrote:

 For the record, I must note that the out of control examples cited by 
 both Mr. Tyng and Rocket Man were both operator malfunctions.  In both 
 cases, the RC systems were working as designed :-) 
 ...

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Re: [TANKS] Re: Remote kill switch

[Mike Lyons]

I'm invoking the Skynet clause of our friendship agreement.


On Monday, November 17, 2014 1:43:31 PM UTC-5, Frank Pittelli wrote:

 ... 

Based on those studies, we should remove all humans from the equation 
 and just let the tanks battle each other.

...

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[TANKS] Re: First Event of the day

[Mike Lyons]

David was assigned to the Stallions but a gas problem took him out after a 
couple of plays.
Caleb was assigned to the Ravens but an electronics failure knocked him out 
pre-game.


On Friday, October 31, 2014 8:31:33 PM UTC-4, jvragu47 wrote:

 ... 

Teams:   Ravens-  Will, Frank, Steve and Joe   Baltimore NFL
   Stallions- Paul, Loic, Doung and John  Baltimore CFL

...


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[TANKS] Re: First Event of the day - more video

[Mike Lyons]

More video at http://youtu.be/PCVOQ-38Izg

Please confirm the tank numbers.

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[TANKS] Re: First Event of the day - more video

[Mike Lyons]

Thanks!  I believe that is the same tank labeled T??? later.


On Sunday, November 2, 2014 12:07:08 PM UTC-5, Caleb Smith wrote:

 In the first scene, T090, the Patton, is labeled as the Panzer II T077.   
 Other than that, great video.  I missed most of the football scenario 
 trying to diagnose the problem with the Quarter Pounder, so these videos 
 are wonderful to watch. :)

 

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[TANKS] Re: Gettysburg 2014OCT26 battle reports - Battle 3, Bazooka Joe

[Mike Lyons]

He had about 20 practice shots the day before and a few before the battles.
Hadn't touched it in a year before that.


On Saturday, November 1, 2014 12:06:32 PM UTC-4, jvragu47 wrote:

 ... 

David is extremely efficient in reload , aim and fire. Lots of practice 
 account for that I'm sure. 

...


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[TANKS] Re: Gettysburg 2014OCT26 battle reports - Battle 3, Bazooka Joe

[Mike Lyons]

A loader will accompany Pfc. Gumm on his next mission.
The loader will be from a different unit (because I don't have another GI 
Joe with the same uniform).

A loader will definitely be required for our next project: 
http://blog.nuclearsecrecy.com/wp-content/uploads/2012/07/FM23-30-Davy-Crockett-loading.jpg
Construction will begin as soon as I locate a source for 1.83 paintballs 
to match the scale of the M-833 round.


On Saturday, November 1, 2014 12:06:32 PM UTC-4, jvragu47 wrote:

 ...

I did notice one thing missing. While the Navarone, Bofors and 25 pounder 
 all have artillery men to man their weapon, where is Bazooka Joe's loader?  
 Hmmm?

...


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[TANKS] Gettysburg 2014OCT26 battle reports

[Mike Lyons]

Here's a new thread to accumulate reports, videos, images, *etc*.

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[TANKS] Re: Gettysburg 2014OCT26 battle reports - Battle 3, Bazooka Joe

[Mike Lyons]

It seemed there were as many cameras as assets on the battlefield
and Bazooka Joe was no exception.

This video http://youtu.be/555qt4PBXpI includes a lot of side-by-side 
footage
and some nice sequences of most of the the tanks.
The side-by-side starts perfectly synchronized but gradually slips.

It runs just over 30 minutes.  View full screen for best results.
Reply with your favorite moments (including timestamps).

This battle was on a relatively small field (about 20 x 40 yards).
The usual 4-shot kill rule was in effect, but an asset could only hit 
another asset once.
Frontal hits don't count (except from the Bazooka).
The one-shot-one-kill for the Bazooka was NOT in effect.
He was positioned about mid-field on the sideline.

Highlights:
- Abomination dancing up a tree
- Bad Kitty doing the herky-jerky
- Several hits by Bazooka Joe, including 3 out of 4 shots in just over a 
minute
- Lots of chatter
- Lots of background sounds, including frenetic volleys as time expires

Please let me know of any corrections or suggestions.
Feedback is welcome.

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[TANKS] Re: Gettysburg 2014OCT26 battle reports - Battle 3, Bazooka Joe

[Mike Lyons]

At 18:17 there is great footage of a paintball in flight in the sunlight
and hitting the Abomination on the tread just below the left idler.

If you set playback speed to 0.25 and toggle play/pause
you can catch the ball in flight and the hit.

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Re: [TANKS] Remote Triggering - R/C digital switch

[Mike Lyons]

The output of the Pololu switch is active-*high*.
The input to the marker is active-*low *(the trigger is a low-side switch).
The digital signal needs to be inverted.
(Note: The latest version of the Pololu series of switches has an 
inversion function
 but this changes the direction of the activation signal (from above 
center' to below center.
 I believe it addresses the need to flip the controls of a combat robot 
when it has been inverted, *i.e.* turned upside down.)

I connected a 1K resistor to a +5V active digital output of a microprocessor
to feed the base of a small, general-purpose NPN transistor
connected across the trigger contacts (emitter to the black wire, *i.e.* 
marker ground)
of my electronic marker and it works fine.
A 1 ms on time (the shortest pause time on the PICAXE I'm using to 
test) is plenty.
I assume the same solution would work for the Pololu Digital Switch.

For this application (R/C firing of an electronic marker)
I recommend the Pololu Switch with Small Low-Side MOSFET.
The extra cost $1.26 more than the Digital Switch, less the resistor and 
transistor)
is justified by the simple implementation (see above 
https://groups.google.com/d/msg/rctankcombat/hu2G5C2fVzo/UG0uZ0niHzsJ ).


On Friday, October 10, 2014 12:19:41 PM UTC-4, Mike Lyons wrote:

 ... 

Challenge: Explain the problem.  Hint:  All you need to know is in this 
 discussion thread over the last few days.



On Wednesday, October 8, 2014 2:38:02 PM UTC-4, Frank Pittelli wrote:

 The switch on the e-trigger is a standard active-low input to 
 a micro-processor I/O port

...

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Re: [TANKS] Remote Triggering - R/C digital switch works fine ... I think!

[Mike Lyons]

I think Frank is onto something here.

Once I understood the active-low issue 
https://groups.google.com/d/msg/rctankcombat/hu2G5C2fVzo/zOoDQ_Q1hlwJ
I tried holding my fire button down (to put the switch into the 
active-high state)
and manually pulling the trigger.

I also tried holding down the fire button and releasing it briefly,
assuming the reverse logic would work.

No luck.

The R/C switch is running off the 6 V R/C receiver power.
The marker has a 9 V battery for its supply.
The pull-up in the marker logic may be too much for the digital signal to 
overcome.
Interfacing systems with different signal levels is always a challenge.


On Saturday, October 11, 2014 8:08:40 PM UTC-4, Frank Pittelli wrote:

 Psst.   Weak pull-up.


On Friday, October 10, 2014 12:19:41 PM UTC-4, Mike Lyons wrote:

 ... 

Advanced challenge #1: Devise a diagnostic procedure using the existing 
setup to confirm your theory. 

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Re: [TANKS] Gremlins of Gettysburg

[Mike Lyons]

my Loic's screams
- by Loic's squeals


On Monday, October 27, 2014 10:42:16 AM UTC-4, Frank Pittelli wrote:

 ... 

 The only negative was the excessively loud motor sounds generated by 
 his amp'd up sound system, but that was drowned out my Loic's screams of 
 surprise/disgust each time the Tiger was destroyed by Bazooka Joe ;-) 
 ...

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[TANKS] Re: Gremlins of Gettysburg

[Mike Lyons]

Bazooka Joe: NIcked an O-ring refilling the COsub2/sub tank.  9V 
battery ran down trying to test the marker.  New O-ring (thanks, John!) and 
new battery were easy fixes but combined diagnostic and repair time caused 
us to miss most of the football game.

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[TANKS] Re: Gremlins of Gettysburg

[Mike Lyons]

This was the second time a low 9V had messed us up.
The Spyder Imagine comes with a 9.6V rechargeable battery.
A 9V alkaline or lithium is the same size and works OK when new but doesn't 
last long.
Might have to invest in a 9.6V NiMH.


On Sunday, October 26, 2014 7:17:31 PM UTC-4, jvragu47 wrote:

 ... marker not recocking  first time low voltage on  9 volt -replaced ...


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Re: [TANKS] 25 Pounder Upgrades for the Next Battle

[Mike Lyons]

Another example here http://www.unofficialbmw.com/images/lock.pdf#page=17.

On page 18 it states the maximum on time for actuators is 0.7 s.
But note that on p14 and p15 it states the actuators have a mechanical stop 
- it may be the time to hit the stop is typically significantly less than 
the 0.7 s limit.
  

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[TANKS] Door lock actuator pulsing

[Mike Lyons]

Another example here http://www.jaycar.com/images_uploaded/powrlock.pdf.

This uses relays and one-shots.  It says the one-shot period is 200-250 ms. 
 Not sure what the pulse width to the actuator would be.

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Re: [TANKS] 25 Pounder Upgrades for the Next Battle

[Mike Lyons]

Correction above: toggle should read rocker.

I found a sample schematic here 
http://schwarttzy.com/wp-content/uploads/2013/01/Hummer-H3-Vehicle-Access.pdf
.
In Figure 1 there is an unlabeled white rectangle which I presume is the 
computer.
The inputs Lock, DR Unlock, and Unlock are on the bottom and the 
corresponding outputs are on the top.
Each output drives a relay which switches an actuator.
The computer probably doesn't do much more than pulse the outputs and break 
ties in the event of wiring faults.


On Tuesday, October 14, 2014 11:00:19 PM UTC-4, Frank Pittelli wrote:

 The toggle switch is probably an input to the computer that operates the 
 auxiliary systems and that computer activates a relay or driver circuit 
 that provides power to the door lock actuator for a split second. 


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Re: [TANKS] 25 Pounder Upgrades for the Next Battle

[Mike Lyons]

My 2004 Sienna has a toggle switch on the driver's armrest to lock or 
unlock the doors.
When I hold down the unlock side the actuators on all the doors click 
briefly even though I hold it down for much longer.


On Tuesday, October 14, 2014 8:32:25 PM UTC-4, Joe Sommer wrote:

 ...Which button?  Which vehicle?  Which actuator? ...


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Re: [TANKS] 25 Pounder Upgrades for the Next Battle

[Mike Lyons]

There's a very high probability I'll have something for you before the 
battle.

On Friday, October 10, 2014 9:43:55 PM UTC-4, Caleb Smith wrote:

 ... After the battle will be too late, Frank ...

 

 On Friday, October 10, 2014 8:13:01 PM UTC-4, Frank Pittelli wrote:

 ... After the battle, I'll build a circuit for you that activates the 
 actuator for 100 milliseconds, regardless of how long the button is 
 pressed. ...



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Re: [TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

I tested the solution described below (4.2) today and it didn't work as 
expected ... but I believe it's a viable solution.
Whaaa  Stay tuned.

I built a Pololu R/C Switch with Digital Output.
The process was almost identical to the previous one for the Pololu MOSFET 
switch,
except I needed two 2-position screw terminals as the two connections I 
needed were not adjacent.
On the upside if I ever want to know the GOOD state and/or tap into the VCC 
it's ready to go.

I turned on the marker power and my remote controller.
When I turned on the power to the receiver (which also powers the switch 
board) the marker immediately fired.
The switch board blinked its LED briefly about once a second as specified.
I pressed the FIRE button on my controller and the switch board LED stayed 
on as specified while the button was pressed but the marker didn't fire.
I pressed the manual trigger on the marker and it fired once, but didn't 
fire one subsequent presses.
I pressed the FIRE button on my controller a few times and nothing.
I pressed the manual trigger and again it fired once but no more.

After scratching my head I realized the problem and a potential solution.

Challenge: Explain the problem.  Hint:  All you need to know is in this 
discussion thread over the last few days.
Advanced challenge #1: Devise a diagnostic procedure using the existing 
setup to confirm your theory.
Advanced challenge #2: Propose a solution using the existing hardware.
Principals of Tri-Pact are not eligible to enter.


On Wednesday, October 8, 2014 5:48:33 PM UTC-4, Mike Lyons wrote:

 ... 

4.1  Connect the output of a logic-level device (examples in 4 above) to 
 the high side of the trigger,
 and the ground of the device to the marker ground (the low side of the 
 trigger would be convenient).
 ...


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Re: [TANKS] Remote Triggering - R/C digital switch works fine ... I think!

[Mike Lyons]

I tested the solution described below (4.2) today and it didn't work as 
expected ... but I believe it's a viable solution.
Whaaa  Stay tuned.

I built a Pololu R/C Switch with Digital Output.
The process was almost identical to the previous one for the Pololu MOSFET 
switch,
except I needed two 2-position screw terminals as the two connections I 
needed were not adjacent.
On the upside if I ever want to know the GOOD state and/or tap into the VCC 
it's ready to go.

I turned on the marker power and my remote controller.
When I turned on the power to the receiver (which also powers the switch 
board) the marker immediately fired.
The switch board blinked its LED briefly about once a second as specified.
I pressed the FIRE button on my controller and the switch board LED stayed 
on as specified while the button was pressed but the marker didn't fire.
I pressed the manual trigger on the marker and it fired once, but didn't 
fire one subsequent presses.
I pressed the FIRE button on my controller a few times and nothing.
I pressed the manual trigger and again it fired once but no more.

After scratching my head I realized the problem and a potential solution.

Challenge: Explain the problem.  Hint:  All you need to know is in this 
discussion thread over the last few days.
Advanced challenge #1: Devise a diagnostic procedure using the existing 
setup to confirm your theory.
Advanced challenge #2: Propose a solution using the existing hardware.
Principals of Tri-Pact are not eligible to enter.


On Wednesday, October 8, 2014 5:48:33 PM UTC-4, Mike Lyons wrote:

 ... 

4.1  Connect the output of a logic-level device (examples in 4 above) to 
 the high side of the trigger,
 and the ground of the device to the marker ground (the low side of the 
 trigger would be convenient).
 ...



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Re: [TANKS] Remote Triggering - R/C digital switch works fine ... I think!

[Mike Lyons]

oops ... the above should read I tested the solution described below 
(4.1) not (4.2).




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Re: [TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

The logic device has a small battery of its own, or is using the R/C 
receiver's battery.  4 x AAs work for me.

The motor switched by the SSR (or whatever) has its own big fat battery. 
 12 V SLA or similar looks good.

The two sides are isolated by the SSR (or whatever).


On Friday, October 10, 2014 4:15:19 PM UTC-4, True North Armouries wrote:

 The ground on the MCU and the low side dont connect to the same place 
 through what black magic? Or are you lugging a second battery around? That 
 sounds like a waste of space, and an additional thing to fail or 
 malfunction at the wrong moment.
 ...

 

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[TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

I finally found the time and motivation to test the Pololu RC Switch with 
Small Low-Side MOSFET http://www.pololu.com/product/2802
It works as expected.  Bazooka Joe is now a little more bionic (strictly 
speaking he's more electronic, less electromechanical than he was).

The marker in RL001 http://rctankcombat.com/rocket-launchers/RL001/ is a 
Spyder Imagine.  A 9V battery powers a circuit board that drives a solenoid 
that flicks the sear to fire the marker.  The trigger presses a SPST 
microswitch.  According to my digital multimeter the microswitch passes a 
constant 480 uA (0.48 milliamps) when closed and one contact is at ground 
level (i.e. it's a low-side switch).  I was surprised the current was so 
low, I guess it's driving a Darlington pair?

I soldered a servo-style lead to the IN, VRC, and adjacent GND pins on the 
MOSFET board, and soldered a tiny link over the VRC and VCC pads to power 
the board from the R/C interface.  I soldered a 2-position screw terminal 
block (with 0.1 pin spacing, very small!) to the LO and adjacent GND pins 
(on the wrong side because a surface-mount device was in the way on the 
right side).  The marker has a pair of wires soldered to the trigger 
microswitch contacts and I connected the other ends of the wires to the 
screw terminals, making sure the ground side was connected correctly (GND 
pin to ground side of switch).

When operational an indicator LED on the switch board blinks on briefly 
about once a second to indicate is has a signal.  When the fire signal is 
sent the LED blinks off briefly about once a second and the marker fires 
with the first blink.  The rate of fire (cycling the R/C signal to re-fire 
the marker) is plenty fast ... no specifics here because Bazooka Joe is a 
single-shot asset so rate of fire isn't an issue.

Conclusion:
I see at least 4 options for firing an electronic marker via R/C:

1. Ignore the electronics and use a servo with an arm or cam to 
mechanically move the trigger or the microswitch actuator.
Pros: Simple, cheap, proven.  You can see if it's working.
Cons: The servo and arm/cam need to be aligned correctly with the trigger - 
needs mechanical engineering.  Subject to wear-and-tear.

2. Use an R/C relay-based switch (examples include the PicoSwitch 
https://www.dimensionengineering.com/products/picoswitch and the Pololu 
RC Switch with Relay http://www.pololu.com/product/2804).  I used the 
PicoSwitch previously and it worked fine (as long as the pulses weren't 
more than 500 ms either side of center, which shouldn't be a problem with 
typical R/C gear).
Pros: Very small, easy to connect (polarity not an issue), voltage/current 
not an issue with typical markers, clicking sound confirms operation.
Cons: Some soldering required for cheaper products (around $10), not for 
more expensive ones (around $20).  Needs electrical and/or mechanical 
engineering.

3. Use a FET-based switch as above.
Pros: Very small, LED shows status.
Cons: Must get polarity right when connecting, some soldering required. 
 Needs electrical engineering.

4. Given the low current I observed it wouldn't be a stretch to build a 
home-grown solution.  A Pololu RC Switch with Digital Output 
http://www.pololu.com/product/2801, or a microprocessor (PIC 
http://www.microchip.com/pagehandler/en-us/products/picmicrocontrollers, 
PICAXE http://www.picaxe.com/, Arduino http://www.arduino.cc/, Raspberry 
Pi http://www.raspberrypi.org/, etc) with a resistor or two and a BJT or 
FET should do the trick.  I'll look into this someday.
Pros: Customizable (e.g. with an MPU you can activate based on certain 
signal characteristic/s).  Cheapish if the parts are lying around your junk 
box.
Cons: Much assembly required.  Needs electronic engineering.

All these solutions are on the order of $10 or less if you can do some of 
the work, $20 or so if you just want to plug it in and go.

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Re: [TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

What's the interface between the R/C receiver (or equivalent e.g. C12C plug 
plug plug)
and the door lock thingamy?


On Wednesday, October 8, 2014 2:38:02 PM UTC-4, Frank Pittelli wrote:

 ... 

5) Use a door-lock actuator to pull the manual trigger. 

...

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Re: [TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

My crystal ball is a little fuzzy but I think I see CRCS.


On Wednesday, October 8, 2014 2:38:02 PM UTC-4, Frank Pittelli wrote:

 ... 

6) Use a prototype Cheap Control Systems Servo Switch board to drive the 

solenoid directly 

 ...

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Re: [TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

Very interesting.  Thanks, Frank!

This suggests an even simpler and lower-cost solution:

4.1  Connect the output of a logic-level device (examples in 4 above) to 
the high side of the trigger,
and the ground of the device to the marker ground (the low side of the 
trigger would be convenient).

The logic levels don't matter as long as high is high enough that the 
marker doesn't interpret it as low and not so high that it blows 
something (unlikely),
and low is ground level.



On Wednesday, October 8, 2014 2:38:02 PM UTC-4, Frank Pittelli wrote:

 The switch on the e-trigger is a standard active-low input to 
 a micro-processor I/O port 

...

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Re: [TANKS] Remote Triggering - R/C MOSFET switch works fine

[Mike Lyons]

In 4.1 I am describing a microprocessor or something similar that produces 
true high and low logic levels.
I'm *not* referring to an ordinary R/C receiver.

The logic-level device may have interpreted R/C signals and produced a 
different type of output,
or it might be a non-R/C solution (WiFi, Bluetooth, etc).


On Wednesday, October 8, 2014 9:37:27 PM UTC-4, True North Armouries wrote:

 4.1 the problem is that the output from the receiver is not a digital 
 logic signal in the high/low sense of the word. Its a ~50hz signal who's 
 duty cycle varies with the position of the stick. Hence why you need a 
 servo switch. 

...

  

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[TANKS] Re: School battles , Long time coming

[Mike Lyons]

Breaking news: Tri-Pact unveils new uniform for RCTC Contest Director

http://4.bp.blogspot.com/-5BlkzuJrTq8/TV6R3cNApxI/BsM/DYXrC3hbflI/s1600/manekshaw.gif

 

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[TANKS] Re: School battles , Long time coming

[Mike Lyons]

Aha!  I KNEW that was YOU poking me with a stick 
http://fc07.deviantart.net/fs70/i/2012/012/9/4/the_sleeping_troll_by_bridge_troll-d4m3pyw.jpg
 !

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Re: [TANKS] Breaking News Alert

[Mike Lyons]

I must vociferously protest the unauthorized disclosure of this image of my 
second attempt at a Nebelwerfer!

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Re: [TANKS] Breaking News Alert

[Mike Lyons]

We can see two sets of machine screws or bolts with nuts in the middle of 
the panel at the top of the photo.
They aren't connected to anything on the back side that we can see.
Can we assume they are only cosmetic (holding a name plate or similar)?

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Re: [TANKS] Breaking News Alert

[Mike Lyons]

That big copper can gives it away.
It's a sonic resonant coffee bean roaster.
This is how we made coffee before Starbucks.

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Re: [TANKS] Minor upgrade to T-79

[Mike Lyons]

I didn't ask my question very well so I'll try again:
What was the maximum rate of fire achieved in practice for the Navarone Gun 
before it was limited?


On Tuesday, February 25, 2014 2:23:50 PM UTC-5, Frank Pittelli wrote:

 The Navarone is currently configured with a 1 second delay and is field 
 programmable in 0.5 second increments. 
 ...

 

 On 2/25/2014 1:28 PM, Mike Lyons wrote: 
  What is the current rate of fire of the Navarone Gun? 
 ...

 

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Re: [TANKS] Minor upgrade to T-79

[Mike Lyons]

What is the current rate of fire of the Navarone Gun?
1 second seems reasonably fast.
For the initial test battle perhaps a more significant delay should be 
tried?

I plan to produce enough of my devices to cover the servo-based markers at 
the next Mid-Atlantic region battle.
I can field-program the delay with a laptop, a cable, and a dongle.


On Monday, February 10, 2014 2:12:32 PM UTC-5, Frank Pittelli wrote:

 ... 

d) The Rules Committee discussed Doug Conn's proposal to limit the rate 
 of fire for all markers.  No consensus was reached, other than to 
 conduct some battlefield experiments to see how it might work.  To that 
 end, the Navarone Gun, and possibly other artillery pieces, will be 
 converted on a volunteer basis to electronically restrict their firing 
 rate (e.g., 1 second pause after firing each paintball). 
 ...

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Re: [TANKS] Re: About time to implement discussed rules update

[Mike Lyons]

I will start a separate thread on this topic.


On Tuesday, December 17, 2013 10:30:17 PM UTC-5, RocketMan wrote:

 ... One rule I wish we had but is probably unenforceable is a rate of fire 
 limit. It's ludicrous to let tanks fire a few times per second.

 ...


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[TANKS] Limiting rate of fire

[Mike Lyons]

Over the years there has been sporadic discussion along the lines of the 
following:

On Tuesday, December 17, 2013 10:30:17 PM UTC-5, RocketMan wrote:

 ... One rule I wish we had but is probably unenforceable is a rate of fire 
 limit. It's ludicrous to let tanks fire a few times per second. ...



I have developed a small, cheap device that sits between an R/C receiver 
and a servo (or compatible device), and is capable of (among other things) 
modifying the servo signal.  I have named it the Servo Signal Analysis and 
Modification Unit (SSAMU).

One potential use for this is limiting the rate of fire of paintball 
markers operated by R/C. On detecting a fire signal the device would pass 
it through, then wait some fixed period before looking for a subsequent 
signal.  For the sake of discussion suppose the complete cycle time was 5 
seconds.

A prototype has been submitted to RCTCHQ for evaluation.  A first-run 
production batch is being assembled - I've completed and tested one and 
several more will be completed soon at which point I will submit samples 
to the Committee for Review of Advanced Prototypes.  Time is the greatest 
enemy, as always.

This solution requires NO modification to the asset (other than unplugging 
the servo from the receiver, plugging the device into the receiver, and the 
servo into the device).  The device is programmable so the input signal 
threshold, output signal value/s and duration/s, and cycle period can be 
adjusted as needed.  A nice side benefit of this device is that it can 
provide consistent triggering (and resetting if needed) - for example it 
could be programmed to move the servo to an on position for 0.25s, a 
reset position for 0.5s, and then back to an off position for the 
remainder of the cycle.  (If the asset owner wishes to retain manual 
control over such functions the device can pass through all signal levels 
other than the rate-limited fire signal).  It can also provide 
semi-automatic firing - if the input signal stays above the threshold the 
SSAMU can generate the fire signal once every cycle.

If there is interest in trying this solution in battle I will donate the 
devices and provide on-site programming.

Note: Based on an online 
surveyhttps://groups.google.com/forum/#!topic/rctankcombat/pii27bEJUFk, 
Web site pages, and battle observations it appears most if not all mobile 
assets use servos (or compatible devices such as R/C switches) to fire 
their markers and would be suitable for this device.  A different solution 
will be needed for assets which use direct switching or other non-servo 
activation, e.g. some field artillery.  Researchers at the 
DODhttp://www.rctankcombat.com/teams/DOD/ labs 
are scratching their heads over this as I write; a proposal 
http://www.urbandictionary.com/define.php?term=Mississippidefid=3413474to 
verbally announce ordinal numbers alternating with the name of a southern 
U.S. state has been rejected as being overly complex and geographically 
insensitive.  The potential solution space appears to be quite large - 
other posters have apparently enumerated at least 555 designs.

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Re: [TANKS] Re: About time to implement discussed rules update

[Mike Lyons]

Steve, for the benefit of those of us with little or no experience, could 
you expound on this please?


On Wednesday, December 18, 2013 1:48:37 AM UTC-5, TyngTech wrote:

 ... We need the frontal exclusion.  Without it the game is unplayable. ...



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Re: [TANKS] Re: About time to implement discussed rules update

[Mike Lyons]

Apologies if I'm rehashing an old discussion ...

HEAT rounds changed the game so that heavy armor plating wasn't very 
effective, and led to the development of reactive armor.
Has consideration ever been given to equalizing modern tanks like 
Merkavas with older thick-skinned tanks?

Steve's proposal would make this point moot.


On Tuesday, December 17, 2013 5:29:38 PM UTC-5, True North Armouries wrote:

 ... Effective armour should absolutely be in the horizontal plane; hence 
 why armour is sloped in tank design...

 

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Re: [TANKS] Limiting rate of fire

[Mike Lyons]

See my *** below.


On Wednesday, December 18, 2013 12:55:08 PM UTC-5, True North Armouries 
wrote:

 How would we determine and enforce the rate of fire rules?

*** The rules would be determined in advance by the Rules Committee and/or 
Contest Director.
The rules would be enforced by requiring use of the device.
The device would be programmed to enforce the required rule and the 
requirements of the individual asset. 

  

Is your device 24 volt tolerant?

*** It sits between a standard R/C receiver and a standard servo (or 
something that takes a servo signal, like an R/C switch).
It takes power from the input wire that is connected to the receiver supply 
and passed through to the servo.
It has its own regulator and will tolerate supply voltages up to 30 V 
although R/C receivers are typically 4.8-6 V.
It accepts a standard servo signal which Frank informs me is either 5 V or 
3.3 V with newer receivers.
It generates a standard servo signal at its regulated supply voltage which 
is the input power supply voltage capped to 5 V.
I have tested it with a C12C using 6 V power supply.  I plan to test it (or 
ask local battlers to test it) using conventional R/C/ gear soon.

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Re: [TANKS] Re: About time to implement discussed rules update

[Mike Lyons]

Perhaps this is the future of RCTC?
http://www.youtube.com/watch?v=qL8y8lTjFSQ



On Wednesday, December 18, 2013 2:05:57 PM UTC-5, Jason Kehoe wrote:

 By no means am I advocating a tank capable of the obscene speeds of a 
 racing touring car. But I do disagree with the painful plodding pace of 
 5-7mph Ive seen tossed around.

...


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[TANKS] Re: Pittelli Prize

[Mike Lyons]

Prize, sir?   ...   Prize, sir?   ...   Prize, sir?   ... 
http://www.youtube.com/watch?v=J6_1Pw1xm9U

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[TANKS] Re: is it? maybe? nope.......

[Mike Lyons]

I believe the image is of Flakturm G in the Augarten, Vienna.
It was indeed an air defense tower.



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[TANKS] Re: 0.50 Marker

[Mike Lyons]

A quick calculation suggests the densities are about the same.
I did very little research online but found some data that suggests the 
0.43 caliber paintball have about the same density too
(and the data I found agreed with your figures for weight).

Assuming the paintballs are spherical and have the same density the 
ballistics should be comparable until some limiting factor kicks in.

See http://www.mcarterbrown.com/50ballistics/dropindistance.html for some 
real-world tests.
It seems that out to about 75 feet the 0.68s and the 0.50s are comparable.

I did not search for any data on gel thickness.


On Tuesday, November 5, 2013 10:14:28 AM UTC-5, Loic atFOA wrote:

 ...

But I heard that the ball being so small has a better ballistic than the 
 0.68? 

...

Searching on the Internet, I find a LOT of opinions on pros/cons of the 
 0.50 size. But not any facts. I'd like to see realistic ballistics on 
 comparable gun platforms. 

...


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Re: [TANKS] Re: 0.50 Marker

[Mike Lyons]

My comments marked with *** below.


On Tuesday, November 5, 2013 11:49:21 AM UTC-5, lo...@fieldofarmortanks.com 
wrote:

 Ballistics would be affected by:

  1.   Diameter size: smaller diameters have less resistance to travel 
 against the air

 2.   Kinetic energy: should be x3 times higher with 0.68” since at 
 that same velocity, it has x3 times the weight

 *** See ballistic coefficient and sectional density.

*** Recall 
http://en.wikipedia.org/wiki/Galileo's_Leaning_Tower_of_Pisa_experiment  
A 100 lb sphere fell very very slightly faster than a 1 lb sphere of the 
same material.

 ...

 

 Mike, thank you for the data provided. It is a little confusing on the 
 graph, but it seems like the kinetic energy on the 0.50” balls is falling 
 out after 75ft. What does it mean at a distance of 0 ft, the height is 40 
 inches? Did they fixed the markers at 3.3 ft height and observed how the 
 ball deflected downward, until it reached the ground?

 *** The site with the link to those graphs is  
http://www.mcarterbrown.com/50ballistics/50tech.html 
I believe they fired with the barrel horizontal and measured the vertical 
drop at each distance.
It seems the middle of the 0.68 caliber barrel was 38 above the ground
and the 0.50 caliber barrel a half-inch lower.
At short ranges the drop is negligible but at long range has to be taken 
into account. 
 

 ...


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[TANKS] Re: id like to ask counsel for a rule alteration/ re-wording

[Mike Lyons]

If you want to base a request for advantages based on realism I suggest 
it's only fair to include similar disadvantages.

For example, that  ISU-152 of yours with its enormous main gun has a much 
lower rate of fire and ammunition capacity than typical MBTs.
If you argue for a one-shot-kill rule others might counter with limiting it 
to X rounds and firing only once every Y seconds.

If you want to build one of these because it looks really cool I support 
you 100%.
If you are trying to cherry-pick the rules to give you a super-weapon 
against the established base I doubt you'll find many backers.
The rules seem to be working well and giving operators of a wide ranges of 
assets some good fun.
FYI it's hard enough to remember what happened during a hectic battle 
without making the scoring complicated.

Build something, bring it out, show it off, have some fun, meet some great 
people.



On Sunday, November 3, 2013 5:09:16 PM UTC-5, ~D wrote:

 ... 

 im just saying that i should have an advantage that is ballanced by equal 
 disadvantages.

...


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[TANKS] Re: id like to ask counsel for a rule alteration/ re-wording

[Mike Lyons]

Hypothetical: You fire your first shell.  It misses so you adjust your aim 
... and wait and wait and wait for the time delay to expire.  While waiting 
your intended victim maneuvers around and blows you away with 4 rapid shots.



On Monday, November 4, 2013 2:38:12 PM UTC-5, ~D wrote:

 as for the X number of shells, it can only hold 6. and i think the y 
 reload time, i wouldnt want to waste a shot if i only have 6 X)


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Re: [TANKS] Re: Suggestion: New How to motor article on website.

[Mike Lyons]

A tank rolls on its road wheels, which in turn roll on the inside surfaces 
of the track links.
The drive sprocket pulls (directly if rear-drive, via the rear idler if 
front-drive) on the portion of the track behind the last road wheel.
Since the track is pinned to the ground by the weight on the road wheels 
the net effect is to move the tank chassis forward.
The rate of movement is determined by the number of track links the drive 
sprocket can affect over time.
If the drive sprocket is toothed it's a simple calculation (number of teeth 
x track link length including space).

If the drive is not toothed you could wrap the track around it to get a 
reasonable approximation.

Another approximation is to calculate the diameter of the drive drum.
Adding twice the track thickness to the drive drum would give the outer 
circumference of the track
as it passes around the drum (ignoring any non-circularity due to flat 
links)
but be aware that the space between links is typically greater in this 
condition than on the ground where it counts.



On Friday, October 18, 2013 7:33:51 PM UTC-4, odyssey...@aol.com wrote:

  what are you measuring by doing that, i don't understand the measuring 
 the tracks.
  
 i know we did talk about the gearing down of the motor, what the final 
 rpm's of the sprocket shaft would be plus the sprocket's dia would give you 
 an idea as to the tanks overall top speed was
  
  In a message dated 10/18/2013 3:34:04 P.M. Eastern Daylight Time, 
 mxl...@cox.net javascript: writes:

 I seem to recall a discussion a LONG time ago to the effect that we should 
 calculate the number of track links that go around the drive wheel and the 
 track link distance on the ground, since that's what actually moves the 
 vehicle.



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[TANKS] How-to article: Remote Triggering of Paintball Markers

[Mike Lyons]

See http://www.rctankcombat.com/articles/

Thanks to Frank for formatting and additional images.
Thanks to those of you who responded to my request for info.

This article will evolve over time as techniques are tried.
If you use any of the techniques (successfully or not) or invent a new one
please let Frank know so we can keep it up-to-date.

Feedback is welcomed.

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[TANKS] Re: Suggestion: New How to motor article on website.

[Mike Lyons]

I seem to recall a discussion a LONG time ago to the effect that we should 
calculate the number of track links that go around the drive wheel and the 
track link distance on the ground, since that's what actually moves the 
vehicle.


On Friday, October 18, 2013 1:39:43 PM UTC-4, TyngTech wrote:
...

 Include the diameter of the track drive wheel and thickness of your tracks 
 (for MPH calculations).

... 

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[TANKS] Re: Suggestion: New How to motor article on website.

[Mike Lyons]

T???-MXL1 Strv 103 under construction

Motor:
- Shenzhen Unite Industries Co., Ltd.
- MY106B4M6-350W
- 24V 350W
- rated speed 2650 RPM; another source gives 3514 no load, 3087 @ max. 
eff., 2858 rated, 2599 @ max. torque 
- 11-tooth #25 sprocket

1st stage:
- 72-tooth #25 gear
- 2 V-dimension pulley

2nd stage:
- 1.75 (or 1.5 or 1.25, not yet selected) V-dimension pulley
- 11-tooth customer drive sprocket

Track spacing: 1.07

By my calculations the 1.75 pulleys will give a speed of 5.16 mph at the 
rated speed of 2650 RPM.


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[TANKS] Re: British Invasion

[Mike Lyons]

http://www.rctankcombat.com/battle-reports/BritishInvasion/SaveThePrincess.shtml

Is that a Princess in your pocket
or are you just chuffed at knocking out a Frenchman?
 

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[TANKS] Marker trigger techniques

[Mike Lyons]

I'm putting together a How to article on triggering markers via remote 
control.
If you use a technique that is NOT already listed in reply to this posting
please add it.  This is not a survey, so please don't add me too replies.
I'm interested in the different techniques, not how popular each is.
Thanks!

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[TANKS] Re: Marker trigger techniques

[Mike Lyons]

RL001 Bazooka Joe uses an electronic marker.
A Dimension Engineering PicoSwitch has its relay contacts wired in parallel 
with the original trigger microswitch which is left in place.

After much frustration I found the PicoSwitch does NOT turn on with a 
full width 2.25ms pulse nor off with a 0.75ms pulse.
It does work reliably with pulse widths of 2.00 and 1.00 ms respectively.

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[TANKS] Re: Countdown Day 8

[Mike Lyons]

Excellent advice.  I used a couple of the thick-shelled rounds to sight in 
my marker without making a big mess, then tested a dum-dum round.  A 
Tyngmelon makes a nice target.  Video: 
http://www.tcm.com/mediaroom/video/476322/Day-Of-The-Jackal-The-Movie-Clip-Quanto-Costa-.html

On Thursday, September 19, 2013 8:48:14 PM UTC-4, jvragu47 wrote:

 ... 

These rounds do however lend themselves to making dum-dum rounds. Since 
 that is not prohibited,yet, this is what you do. Take the finest,sharpest 
 x-acto blade and place a very light x on a non-seamed area.  Makes 
 certain that on impact ,no matter the surface, the round will explode. 

... 


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Re: [TANKS] Re: R/C switch suggestions

[Mike Lyons]

DPDT (good for fwd-off-rev for small motors).
Solder connections for switch contacts sized for optional screw terminals.
Status LED(s) nice but not necessary.


On Tuesday, September 10, 2013 5:57:16 PM UTC-4, Frank Pittelli wrote:

 Simple, yes.  Profitable, NO. 

 That said, I will be starting work on some prototype circuits after the 
 next battle.  So, if anyone has suggestions, now's the time to post them. 
 ...

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Re: [TANKS] Re: M4A3 75mm Build Project

[Mike Lyons]

Agreed.  It would be very nice to have a SPDT R/C switch instead of the 
SPST functionality each of these provides.


On Monday, September 9, 2013 5:30:54 PM UTC-4, Frank Pittelli wrote:

 Both are decent products.  It's just a shame, however, that they can 
 only control a single device using a full servo channel.  They could 
 have easily added a dual relay or two MOSFETs to control two devices 
 using a single servo channel without much additional cost. 


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Re: [TANKS] Re: M4A3 75mm Build Project

[Mike Lyons]

I used a Dimension Engineering PicoSwitch (see 
http://www.dimensionengineering.com/products/picoswitch ) in Bazooka Joe. 
 It's a nice little relay with a green LED that lights when the relay 
contacts are closed.  There is a also an audible click as the relay changes 
state.  There are two screw terminals and an RC plug - couldn't be simpler. 
 Polarity is not an issue on the contacts.  I soldered a pair of wires 
across the trigger contacts of my electronic marker (so I can fire it 
manually as needed for testing) and screwed the other ends into the relay. 
 It fires when the RC control is about half-way to one end.

I'm about to test a Pololu low-side MOSFET switch a (see 
http://www.pololu.com/catalog/product/1210 ) and will report when I have 
news.  This will require some soldering but is less than half the price. 
 My marker trigger switch operates on the low side (connecting the 
electronics to the circuit ground) so this is ideal.  The circuit diagrams 
I could find for the Turnigy thing seem to indicate it's a high-side switch.


On Wednesday, May 22, 2013 3:19:44 PM UTC-4, Mike Mangus wrote:

  Another for firing an electronic trigger marker is an electronic on/off 
 switch.  The Turnigy switch from Hobby King costs less than $7.  Course, 
 there is shipping too ... heh.
  
 Mike

   *From:* Frank Pittelli frank.p...@gmail.com javascript:
 *To:* rctank...@googlegroups.com javascript: 
 *Sent:* Wednesday, May 22, 2013 11:13 AM
 *Subject:* Re: [TANKS] Re: M4A3 75mm Build Project
 ... 

5) Fire control is the simplest of all systems.  If your marker has an 
 electronic trigger, you only need a stock servo ($10) and a micro-switch 
 ($1).

...


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[TANKS] Re: Quartermaster Provision Requisition

[Mike Lyons]

I will be attending with my #1 cadet (9 years old).
We'll arrive late Saturday afternoon and stay for the Sunday battles.

Bazooka Joe has had an overhaul and looks to be in fine fighting form.
I can neither confirm nor deny that a brand-new asset will debut at this 
event.

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[TANKS] RCTC standard for tow hitches

[Mike Lyons]

I'm working on a towed artillery piece.
Is there a standard/convention/recommendation/guideline/suggestion for the 
towing hardware?
I'm leaning towards a simple eye bolt on the towed end.
What (if anything) do existing vehicles have on the towing end?

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[TANKS] Re: Field Marshal Tyng demoted?

[Mike Lyons]

DoD http://www.rctankcombat.com/teams/DOD/ intelligence has just received 
a field report documenting *the 
technology*http://www.youtube.com/watch?v=V17duGlHEYYbelieved to be behind 
the Tyng Transformation.

DERPA scientists believe the transformation process involves a Minié ball 
in a .68 cal paintball sabot.
The device can be extracted in *a simple, painless 
procedure*http://www.youtube.com/watch?v=mSiFXhrxE3Y
.

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[TANKS] Re: Bazooka

[Mike Lyons]

I bought one of these 
http://www.rap4.com/store/paintball/p/001297/m68-thunder-grenade a while 
ago.  It wouldn't charge with CO2.  After reading of similar problems I 
contacted the vendor, who said they had a lot of problems and offered a 
full refund.



On Monday, November 24, 2008 8:19:25 AM UTC-5, Paul wrote:

  I'm not sure how I got on the RAP mailing list, but they've sent me 
 another interesting email!  The price is a bit steep, still interesting:
  
 http://www.rap4.com/paintball/news/news_article.php?news_id=221
  
 Paul H.


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[TANKS] Bazooka Joe's Debut

[Mike Lyons]

 

*Bazooka Joe's Debut*

I had Bazooka Joe operational around 2am so I hit the sack for a few hours, 
took care of a family commitment, and hit the road eager to put Joe into 
action.  Two hours later I had gone about 3 miles (Washington area traffic 
+ accident = gridlock) and eventually arrived after the first battle had 
ended.

After sides had been picked (Joe was picked last, only fair for an unknown 
quantity) the RCTC Rules Committee voted unanimously (1-0) to approve a 
one shot, one kill rule for Joe.  I liked this idea as I couldn't imagine 
how I would be able to get multiple shots loaded and fired against a mobile 
tank.

As seen from our home 
basehttp://www.rctankcombat.com/battle-reports/BridgeTooFar/photos/DSC_0598-large.jpgthere
 was a 
wide stone 
bridgehttp://www.rctankcombat.com/battle-reports/BridgeTooFar/photos/DSC_0591-large.jpgon
 the left flank, a 
narrow wooden 
bridgehttp://www.rctankcombat.com/battle-reports/BridgeTooFar/photos/DSC_0593-large.jpgin
 the center, and a 
shallow 
fordhttp://www.rctankcombat.com/battle-reports/BridgeTooFar/photos/DSC_0594-large.jpgon
 the right.  
The Navarone Gun was set up to cover the center bridge and I positioned Joe 
in some broad-leafed plants on the right side of the stone bridge (on the 
right edge of the photo).  On the far side the road went straight for about 
5 yards then turned right.  There was a narrow goat track running parallel 
to the stream on the far side, joining the road very close to the bridge.

There was a pot of gold in the center of the bridge so I took a few 
practice shots to get an idea of the range.  This was the first time I had 
fired a paintball from the assembled unit, and I was pleased to get in the 
general area after a handful of shots.

When the battle started there was a lot of action in the center.  Joe 
brought his Hetzer down to the bridge and collected the pot of gold with no 
resistance.  After a few minutes Frank's Tiger came clanking along the road 
from the rear right.  As he turned my way I lined up for a flanking shot – 
it was straight but high by a couple of feet.  It's a lot harder to judge 
the elevation on the short bazooka than on the long guns.  I reloaded 
quickly but Frank was approaching front-on and I had no shot.  It didn't 
take long for him to score the first hit ever on an armed infantryman, 
knocking Joe' helmet flying.  I only found it while cleaning up at the end 
of the day, about 3 feet from this position.

Later Frank approached more cautiously, creeping through the long grass 
between the road and the goat track.  Again I had no shot as he presented 
only his front.  He landed a nice shot from about 15 feet away.

After reincarnating again I moved Joe across the bridge to the junction of 
the road and the track.  Things were quiet for a while so I tried a couple 
of long shots into the area behind the center bridge.  I didn't hit 
anything (too high again) but it sure caused confusion for the enemy 
commanders over there.  It also attracted the attention of the Cromwell.  Steve 
worked his way along the goat track and showed me only a brief side shot 
for a moment - I took the shot but was wide by a few inches.  While I tried 
to reload the Cromwell raced up and blew Joe away.

After being killed by Frank yet again (and accidentally hitting him square 
in the chest – sorry!), there was a long time with no action (I later 
learned most of my comrades were in the repair shop).  I relocated to the 
enemy's side of the battlefield, setting up close to the big tree shown 
herehttp://www.rctankcombat.com/battle-reports/BridgeTooFar/photos/DSC_0602-large.jpg
.  Doug's Tiger was circling Turncoat Tyng's Cromwell about 30 feet away.  I 
took my time to line up a shot and splattered Doug's rear – one shot, one 
kill!  A successful debut, breaking even on combat points and sharing in a 
small number of mission points for a net positive result.

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[TANKS] Re: Testing 1 2 3

[Mike Lyons]

4 5 6

On Monday, October 1, 2012 6:14:23 PM UTC-4, Frank Pittelli wrote:

 ... If you think that a message from you was lost by the mailing list in 
 the last 
 couple of days, please post a test reply to this message ...

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[TANKS] Just testing

[Mike Lyons]

... to see if a new topic works now.

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[TANKS] Re: Transmission teaser

[Mike Lyons]

Not necessarily reduction in both parts.

Those 72-tooth sprockets (that look like circular saw blades) give a ratio 
of 1:6.545.
They were the largest I could find for #25 chain.

The pulleys I can fit on the front and middle shafts would allow as low as 
1:9.164 and as high as 1:3.273.

As you can see I used every inch of available space inside the hull and 
then a little more.

For my first installation I am using the nominal rated speed of the motors 
and aiming for scale replication of the actual top speed.  I'll drop it 
down if it makes traverse aiming too twitchy.


On Monday, September 17, 2012 7:24:42 AM UTC-4, TyngTech wrote:

 Good work.  Nice to see a good ole' fashioned double reduction 
 transmission.


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