I remember it--and my also long-gone Estes Screamin' Eagle Land Rocket (car)--well. That XR 100 motor had a tiny hole in its forward closure, which spurted liquid RP-100 when the motor was full, preventing the motor from bursting. It also powered the Vashon/Estes Shrike and XS-1 Space Shuttle foam rocket planes (and it would also make a good "drop-in" replacement for the Jetex/Jet-X and Rapier motors, in jet plane, car, and boat models, including the new-production classic and new Jetex kits (see: https://www.vintagemodelcompany.com...red-models.html and https://jetex.org/ ).

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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
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NAR #54895 SR

Really . . .

Imagine what "pressure motor" could be created using THIS ( with the proper nozzle design ) .

https://www.nuvair.com/nuvt-asme.html

That is 7000 PSI !

This one weighs less ( 6000 psi tank )

https://www.nuvair.com/nuvt-6000.html

Dave F.

A couple more XR 100 pics.

Dave F.

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Thank you--looking at those, and remembering mine, I can't help thinking that the XR 100 would be the easiest of the Cold Propellant motors for a machine shop, and/or perhaps Shapeways (with their metal 3D printers) to duplicate, if Estes (hint, hint, any lurkers from Penrose, CO!) didn't make them. Also:

The XR 100 would also find a market among Jetex/Jet-X/Rapier jet model enthusiasts (of which there are surprisingly many: https://jetex.org/ ), as the XR 100 powered the Jetex-like Vashon/Estes Shrike and XS-1 Space Shuttle hand-launched rocket planes (see: http://www.ninfinger.org/rockets/ca...73/73est44.html ), as well as the Estes Land Rockets (see: http://www.ninfinger.org/rockets/ca...75/75est42.html [there were/are also Jetex car and boat models]).

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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
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http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR

Manuvering THRUSTORS, Yes.
Actual main rocket propulsion source ??
That's a BIG KING SIZED CAN of HFN ( Hell-Frakkin'-NO). to THAT.

I stand by my original statement.
OBSOLETE even before Vashon brought them to market.
No FIRE=NO ROCKET.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !

So, Ion propulsion is "not a rocket" ?

https://en.wikipedia.org/wiki/Ion_thruster

Dave F.

Cold-gas thrusters (nitrogen, xenon, helium, etc.) work great in a vacuum, and even--for lightweight re-entry vehicles--in the atmosphere, until the aero-surfaces (if any) take hold. The Mercury capsules used hydrogen peroxide monopropellant thrusters, but most of them were low-thrust [1 pound] units, yet they worked effectively even after re-entry, and:

Rear Admiral Robert C. Truax made steam rockets (and not just for Evel Knievel) that worked on the same pressurized propellant pressure drop/phase change principle as the Vashon motors; only the propellant formulae (and motor sizes) were different. He developed an educational steam rocket (with a water heater/launcher base; a low-melting point alloy nozzle plug blew out at launch) that was about three feet long. (In Mexico, steam rocket car races are popular, with both local and foreign drivers and car crews taking part.) Any self-contained propulsion system that hurls matter--regardless of whether or not it's burning, or even hot--in one direction, to produce motion in the opposite direction (which enables it to produce motion in a vacuum), is a rocket. (Likewise, even an electric ducted fan [EDF] is a jet--a pressure jet, whose exhaust isn't heated by burning a fuel with the air [or heated by a nuclear reactor, or by hot filaments]--because a jet engine is any air-breathing propulsion system that produces thrust by accelerating and directing its exhaust out of a nozzle.)

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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
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http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR

Arthur C. Clarke expressed it well in two brief paragraphs in his non-fiction 1968 book "The Promise of Space" (on the last page of Chapter 3, 'Nothing to Push Against'):

"Almost all rockets that have been built so far have obtained their thrust from chemical reactions: burning substances have generated hot gases that escape from a nozzle. However, there are endless ways of producing the same effect: any power source may be used, from a nuclear reactor to an electric battery. And any material may be used to provide the jet: solids, liquids, gases, electrons, ions, subatomic particles. As long as they have mass and can be aimed in a definite direction, they will give thrust.

"Perhaps in the far future there may be spacecraft propelled by the swiftest 'jet' than can exist--beams of pure light of unimaginable intensity, created by generators brighter than a billion suns. But they will still be rockets, in the direct line of descent from the crude vehicles which, in our time, first broke through the barrier of the atmosphere." ALSO:

Space sails (solar sails https://en.wikipedia.org/wiki/Solar_sail , laser-pushed lightsails https://www.space.com/laser-sail-ce...h-starshot.html , electric sails [E-sails: https://en.wikipedia.org/wiki/Electric_sail ], and magnetic sails [magsails: https://en.wikipedia.org/wiki/Magnetic_sail ]) also operate, as rockets do, according to Isaac Newton's Third Law of Motion ("For every action there is an equal and opposite reaction"), but they are not rockets because a rocket, by definition, is a completely self-contained propulsion system. The various types of space sails also operate by the action-reaction principle, but their "propellant" (solar [or one day, stellar] photons, photons from lasers, charged particle beams, charged solar wind [or one day, stellar wind] particles, and planetary, solar, and/or stellar magnetic fields) isn't contained within the sails, but comes from outside them.

__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR

Yes, but only in an upright. Flights are too short in a canister. They get really dusty in there unless you put a new bag on first.

__________________
I love sanding.

I found some highly-classified images of the propulsion unit for the U.S.S. ELECTROLUX . . .

Dave F.

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