[TANKS] Re: Throwing a track

[Derek Engelhaupt]

I have learned from my experimentation with roller chain tracks that
the chain should be as large as possible.  In gravel I would get small
pebbles stuck in my chain links that would affect they way the chain
meshed on the sprockets.  Usually the motors would push through the
obstructions, but it did cause the tracks to come off on occasion.
That's why I like the 2060 chain since there are large cavities for
the pebbles to fall out of instead of getting stuck.

Derek

On Thu, Jan 8, 2009 at 5:53 PM, Mike Måne  wrote:
> Speaking of tracks, I was wondering if you veterans could lend some advice
> on sprocket chains. I was thinking about making a simplified version of the
> T80 HVSS Sherman tracks. The horns, like most tanks, run between the double
> road wheels. They will probably be made of plain wood, wood with rubber,
> masonite, plastic, or something similar. (Haven't gotten that far) But more
> than likely I will not be leaning towards metal links. Would you recommend a
> sprocket chain along the middle of the tracks? If so, what size? If not,
> what else?
>
> Thanks,
> -
>
> On Wed, Jan 7, 2009 at 10:00 PM,  wrote:
>>
>> how tall of a guide can you make before it hits the bolt going through
>> your road wheel? maybe make your guides half of that - or at least double
>> what you have.
>>
>> i am worried about having the same problem with the tiger as the guilds
>> will only be as tall as the attachment chain - but until i get a bit
>> further, i won't know either
>>
>> Chris,
>> Odyssey Slipways
>>
>>
>> 
>> New year...new news. Be the first to know what is making headlines.
>>
>>
>>
>> --
>> -Mike Måne @
>> http://moonrcprojects.googlepages.com
>>
>>
>> >>
>

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[TANKS] Re: Throwing a track

[Mike Måne]

Speaking of tracks, I was wondering if you veterans could lend some advice
on sprocket chains. I was thinking about making a simplified version of the
T80 HVSS Sherman tracks. The horns, like most tanks, run between the double
road wheels. They will probably be made of plain wood, wood with rubber,
masonite, plastic, or something similar. (Haven't gotten that far) But more
than likely I will not be leaning towards metal links. Would you recommend a
sprocket chain along the middle of the tracks? If so, what size? If not,
what else?

Thanks,
-

On Wed, Jan 7, 2009 at 10:00 PM,  wrote:

>  how tall of a guide can you make before it hits the bolt going through
> your road wheel? maybe make your guides half of that - or at least double
> what you have.
>
> i am worried about having the same problem with the tiger as the guilds
> will only be as tall as the attachment chain - but until i get a bit
> further, i won't know either
>
> Chris,
> Odyssey Slipways 
>
>
>
>  --
> New year...new news. Be the first to know what is making 
> headlines
> .
>
> >
>


-- 
-Mike Måne @
http://moonrcprojects.googlepages.com

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[TANKS] Re: Throwing a track

[Steve Tyng]

There are several factors that come into play for a successful track
system.  In my mind they are:

Lateral flex: How much twist does the track have? The more it can
twist the more the top of the guide teeth can get out of alignment.

Side flex: How much can the track bend side to side? The more side-to-
side bend the more chance of guide teeth going out of alignment.

Guide tooth height: The taller the guide teeth the less chance of them
disengaging from the road wheels.  This is one area IMHO that scale
heights for guide teeth SHOULD NOT be followed!  Teeth should be as
high as your mechanism will allow.

Number of guide teeth:  The more the better, nuf said!

Tension:  To me, high tension is the last resort in proper track
design.  If a track has to be highly tensioned to keep it on then the
track system is deficient in one or more other areas.  High tension is
usually required in a friction drive setup to keep the drive wheels
from slipping to much, not to keep the track on.


Steve Tyng







Your guide teeth are to short.

On Jan 7, 8:35 pm, "Crooks, Steven M" 
wrote:
> At the moment I'm using hand built tracks with side links:
>
> So the sprockets engage each link on the side.
>
> I notice some have very taught tracks (like Steve Tyngs tread wheels)
> And some are slack tracks, like the Bt-7
>
> Steven C
>
> -Original Message-
> From: rctankcombat@googlegroups.com
>
> [mailto:rctankcom...@googlegroups.com] On Behalf Of Frank Pittelli
> Sent: Wednesday, January 07, 2009 7:16 PM
> To: rctankcombat@googlegroups.com
> Subject: [TANKS] Re: Throwing a track
>
> Crooks, Steven M wrote:
> > What is it that causes tracks to be thrown?
> > Are the road wheels immediately adjacent feeding the idlers/sprocket
> > That are most important? Is it the track design?
>
> > How do you make a track and running gear arrangement that doesn't get
> > thrown (much) ?
>
> What type of track and drive wheels are you using?
>
>         Frank P.
>
> The contents of this electronic mail message and any attachments are 
> confidential, possibly privileged and intended
> for the addressee(s) only. Only the addressee(s) may read, disseminate, 
> retain or otherwise use this message. If
> received in error, please immediately inform the sender and then delete this 
> message without disclosing its contents
> to anyone.
>
>
>
>  FubarTrack.JPG
> 39KViewDownload
>
>  ShermanSteelShod.jpg
> 29KViewDownload
>
>  FieldTrials07302008 002.jpg
> 77KViewDownload
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[TANKS] Re: Throwing a track

[Paul Hilton]

I would simply try what you've got, Steven.  In looking at pics of actual 
Sherman tracks, the guide teeth look pretty much like what you have.  As for 
"slack track" configurations, most tend to use longer guide teeth.  In 
Christie system, the guide teeth are also what drives the track, sort of a 
roller chain and sprocket in reverse with the rollers on the sprocket and 
the teeth on the chain.

Paul H.
- Original Message - 
From: "Crooks, Steven M" 
To: 
Sent: Wednesday, January 07, 2009 8:35 PM
Subject: [TANKS] Re: Throwing a track


At the moment I'm using hand built tracks with side links:

So the sprockets engage each link on the side.

I notice some have very taught tracks (like Steve Tyngs tread wheels)
And some are slack tracks, like the Bt-7

Steven C

-Original Message-
From: rctankcombat@googlegroups.com
[mailto:rctankcom...@googlegroups.com] On Behalf Of Frank Pittelli
Sent: Wednesday, January 07, 2009 7:16 PM
To: rctankcombat@googlegroups.com
Subject: [TANKS] Re: Throwing a track


Crooks, Steven M wrote:
> What is it that causes tracks to be thrown?
> Are the road wheels immediately adjacent feeding the idlers/sprocket
> That are most important? Is it the track design?
>
> How do you make a track and running gear arrangement that doesn't get
> thrown (much) ?

What type of track and drive wheels are you using?

Frank P.








The contents of this electronic mail message and any attachments are 
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message without disclosing its contents
to anyone.





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[TANKS] Re: Throwing a track

[jvragu47]

Steve,
 I've run 3 different types of tracks, bicycle chain with
riveted pads, interlox, and TTS.
 Not one ever threw track. I did succeed in throwing plenty of
pads off of the bicycle track and also tore open the joint in the TTS.
The TTS problem occurred due to lack of adhesive between the pads and
treadmill belting. Proper tensions are needed on whatever system that
you're running. Plenty of trial runs will help you dial in that sweet
spot. Good luck, the track looks great.

John


On Jan 7, 7:46 pm, "Crooks, Steven M" 
wrote:
> Ok,
>
> So we have here wise veterans of a decades combat,
>
> Who are more experienced than I'm likely to ever be.
>
> What is it that causes tracks to be thrown?
>
> Are the road wheels immediately adjacent feeding the idlers/sprocket
>
> That are most important? Is it the track design?
>
> How do you make a track and running gear arrangement that doesn't get
> thrown (much) ?
>
> Steven Crooks
>
> The contents of this electronic mail message and any attachments are 
> confidential, possibly privileged and intended
> for the addressee(s) only. Only the addressee(s) may read, disseminate, 
> retain or otherwise use this message. If
> received in error, please immediately inform the sender and then delete this 
> message without disclosing its contents
> to anyone.
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[TANKS] Re: Throwing a track

[OdysseySlipways]

how tall of a guide can you make before it hits the bolt going through your  
road wheel? maybe make your guides half of that - or at least double what you  
have.
 
i am worried about having the same problem with the tiger as the guilds  will 
only be as tall as the attachment chain - but until i get a bit further, i  
won't know either
 
Chris,
_Odyssey  Slipways_ (http://hometown.aol.com/odysseyslipways/index.html) 
**New year...new news.  Be the first to know what is making 
headlines. (http://www.aol.com/?ncid=emlcntaolcom0026)

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[TANKS] Re: Throwing a track

[Derek Engelhaupt]

Did you build a track tensioner into the chassis?  Proper track
tension will go a long way to keeping tracks on.  I agree with a few
of the others about the guide teeth, I don't think they are tall
enough.  Tracks being thrown can be caused by a miriad of problems.

Derek

On Wed, Jan 7, 2009 at 7:35 PM, Crooks, Steven M
 wrote:
> At the moment I'm using hand built tracks with side links:
>
> So the sprockets engage each link on the side.
>
> I notice some have very taught tracks (like Steve Tyngs tread wheels)
> And some are slack tracks, like the Bt-7
>
> Steven C
>
> -Original Message-
> From: rctankcombat@googlegroups.com
> [mailto:rctankcom...@googlegroups.com] On Behalf Of Frank Pittelli
> Sent: Wednesday, January 07, 2009 7:16 PM
> To: rctankcombat@googlegroups.com
> Subject: [TANKS] Re: Throwing a track
>
>
> Crooks, Steven M wrote:
>> What is it that causes tracks to be thrown?
>> Are the road wheels immediately adjacent feeding the idlers/sprocket
>> That are most important? Is it the track design?
>>
>> How do you make a track and running gear arrangement that doesn't get
>> thrown (much) ?
>
> What type of track and drive wheels are you using?
>
>Frank P.
>
>
>
>
>
>
>
>
> The contents of this electronic mail message and any attachments are 
> confidential, possibly privileged and intended
> for the addressee(s) only. Only the addressee(s) may read, disseminate, 
> retain or otherwise use this message. If
> received in error, please immediately inform the sender and then delete this 
> message without disclosing its contents
> to anyone.
>
> >
>

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[TANKS] Re: Throwing a track

[Frank Pittelli]

Crooks, Steven M wrote:
> What is it that causes tracks to be thrown?
> Are the road wheels immediately adjacent feeding the idlers/sprocket
> That are most important? Is it the track design?
> 
> How do you make a track and running gear arrangement that doesn’t get 
> thrown (much) ?

What type of track and drive wheels are you using?

Frank P.

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