the energy that goes into pressuring the propellants isnt waisted
that energy is converted to KE too (through the injectors and as pressure
drop across the nozzle)
if we are assuming perfect environment of course
i think the reason it stops spinning is "real world" friction etc
in an ideal environ
.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Pierce Nichols
Sent: Saturday, June 12, 2004 1:50 AM
To: Jake Anderson
Cc: [EMAIL PROTECTED]
Subject: RE: Multiple engines (was RE: [ERPS] Liquox)
On Fri, 2004-06-11 at 05:28, Jake Anderson wrote:
> why wo
why would you use square nozles?
the plates would be laser/water cut (presumably something like 8mm?)
then a whole bunch of machined up round nozles stuck in
if you got creative with your machining and nozle design you wouldnt even
need to weld the nozles in
it'd all "just fit"
-Original M
reposted to list with permission (2 emails stiched togther)
At 04:01 PM 4/19/2004 +1000, you wrote:
>just something i noticed when looking at your vane vehicle
>it looks like the vanes are pivoted in the center, wouldnt that make them
>unstable in the gas flow (ie fluttering when at 0 angle) and r
it'd be interesting to see what ammount of kerosene or some other chemical
would be needed to make the powder into something liquid like.
or
hmmm
H202 + Al2O3 hybrid anybody? ;->
- Original Message -
From: "Henry Spencer" <[EMAIL PROTECTED]>
To: "ERPS" <[EMAIL PROTECTED]>
Sent: Friday,
This is a rocketry list, please don't fill it up with crap like this post.
Personally I was put off using linux by people and messages like this.
- Original Message -
From: "David Masten" <[EMAIL PROTECTED]>
To: "ERPS Main List" <[EMAIL PROTECTED]>
Sent: Sunday, August 31, 2003 12:27 PM
Su
you just want to build the satellite delivery system ;->
- Original Message -
From: "David Weinshenker" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, August 27, 2003 2:56 PM
Subject: Re: [ERPS] FYI: Final Columbia Accident Report
> Randall Clague wrote:
> > "Gotten their
al Message -
From: "Randall Clague" <[EMAIL PROTECTED]>
To: "Jake Anderson" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, June 11, 2003 1:20 PM
Subject: Re: [ERPS] Linux Rocket Blasts Off This Fall
> On Wed, 11 Jun 2003 12:20:40 +1000, &qu
as with most things ion engines have their uses and they are good at what
they do. there are however some areas where they arent so good.
hmmm thaught, CD/NOx hybrid. get a small pile of CD's (say star office) use
that as the grain, and you could have a litterally open source powered
rocket. the A
my only real concern with resin type laminates for TPS in this sorta set-up
would be delamination.
the environment of the TPS seems like it could fairly easily cause a
significant horizontal delamination or at least microscopic Z axis cracks
(IE "into" the material). in a single use set-up it proba
I think going back to ablatives is the wrong way for NASA to go
ablatives would be a good option for a commercial venture but NASA is meant
to be progressing
generally the commercial world is a step or 2 being the Govt research world.
they should replace the tile TPS system for sure but perhaps wit
dont forget that MR Daffy Duck is persona non grata
that whole incedent with planet X you know.
- Original Message -
From: "Randall Clague" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Friday, January 31, 2003 6:04 AM
Subject: Re: [ERPS] Re: Monatomic Hydrogen
so tell them about the dangers.
its "people like you" who keep rocketry so tightly regulated though for the
large part it is safer than filling your car up at a crowded service
station. say this person listened to your advice "don't do rocketry, you
will die and btw you and your teacher are just so
yeah, way to encourage people there.
most people aren't too fond of loosing their limbs and when the dangers are
pointed out will take steps to prevent harm. rather than just saying in
effect "how dare you even think about it" perhaps take a minute longer and
actually give the person some informati
you wouldn't even need a fully fledged chute for that stability thing, a
streamer (think the tail of a kite) would be all you would need and you
could start it short and let it extend as the vehicle went higher if you
felt like it, it would probbably have a fair bit less drag and might do the
job a
just think about it a person could be arrested for carrying around 80kg of
this dihydrogen monoxide concealed on/in their person then to go from a
felony unlicensed explosives charge to a full blown terrorism charge when
they are discovered in position of a car battery for the purposes of
processin
just a correction to my last
they have sample rates up to 40Mhz
___
ERPS-list mailing list
[EMAIL PROTECTED]
http://lists.erps.org/mailman/listinfo/erps-list
have you guys seen
http://www.bitscope.com/
they are an open source group that have plans (and kits) for 20Mhz digital
ocilloscope complete kit runs to $395
anyway they have some funky A/D boards in order to do this and i was
thinking perhaps you could stick them (the A/D boards) onto your gyro's
you guys are just using the raw IMU data for position information?
even a simple kalman filter or dogified version of it might have helped
reduce the problems you had (though the solutions you propose are by far a
better way of doing things. (Solving the problem is better than working
around it ;->
yeah well allegedly god created the world in 7 days, us mere mortals might
find it a touch more difficult ;->
- Original Message -
From: "John Carmack" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 13, 2002 10:07 AM
Subject: Re: [ERPS] Some thoughts on the Open VTVL
Just for reference this is the same/simmilar design as the mercury system.
differrence being they used pure O2 at 5psi. that worked for missions up to
gordon coopers 34hours and 20 minutes.
I am just struck by the similarity between what is happening now and the
mercury 7 sub-orbital flight
-
e of their peroxide was affecting their entire run not just the
start.
- Original Message -
From: "Randall Clague" <[EMAIL PROTECTED]>
To: "ERPS" <[EMAIL PROTECTED]>
Sent: Saturday, November 02, 2002 4:15 AM
Subject: [ERPS] Peroxide tank heating
> On S
warm-up time
- Original Message -
From: "Randall Clague" <[EMAIL PROTECTED]>
To: "ERPS" <[EMAIL PROTECTED]>
Sent: Friday, November 01, 2002 7:51 PM
Subject: Re: [ERPS] KISS III Propulsion System Test
> On Fri, 1 Nov 2002 18:45:05 +1100, "Ja
why fly the heater at all?
if the tank is at the right temperature or thereabouts it shouldnt change
that quickly put a sensor in your tank and the heaters in a jacket on the
outside when its hot enough drop the jacket and hit the button
- Original Message -
From: "Randall Clague" <[EMAIL
just had a thaught
peroxide decomposes rapidly at high temperature (well i hope so because the
rest of my thaught is based on that)
so if you placed say a piece of carbon with "the right shape" TM
in the combustion chamber such that the peroxide was sprayed onto it
and a portion of it was in the
one small hop for
i'm sorry i'm sorry don't hurt me ;->
- Original Message -
From: "John Carmack" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, September 29, 2002 3:49 PM
Subject: [ERPS] Armadillo Update (manned hop)
> http://www.armadilloaerospace.com/n.x/Armadillo/Ho
just 2 small things
a swirl sufficent to mix propellants would be a "Bad Thing" (TM pat pend) in
a rocket with a single motor, the torque it would put on the rocket would
probbably be signficant. i think it may be better to have the configuration
is something of a dome shape with fuel being inject
"simple, catapult launched giant water rockets that can take a load of
skydivers to 15,000 feet in under a minute. This would be safer than
airplanes. "
cough hack ahem
I cant really decide on just one witty remark/retort to that so I'll trust
in your ability to choose the one you feel most apt.
even a few hours warning could be significant in reducing "direct" deaths IE
people could get underground / basments etc (think "duck and cover") a few
minutes could potentially save a significant number of lives. Whilst the
devestation would still be unthinkablle if it saves a few thousand people
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