When Hybrid Rockets go wrong 2 (Hybrid post mortem)

[soverato3]

what does a bottle of nos costs?, can you refill it?? and for how many engine fires can you use it???

thnx!! 

[pereduranofcourse]

Are you mad, aluminium melts at 640 degrees celcius but steel at 1350 degrees celcius! Next time think which materials you are using. You were lucky that the box safed you!

[Atevra]

@pereduranofcourse that has nothing to do with it

[pereduranofcourse]

@Atevra sir, it does...

[Atevra]

Have you built a rocket motor before? have you seen a commercial high power rocket motor? Aluminium is a more widely used material than steel for rocket motor casings, for many reasons so you can use Google. Look at tensile strength/motor operating pressures, thermal liners/temperatures in combustion chamber, (fuel grain is often used as a heat barrier between aluminium casing in amateur hybrid motors) and materials used professionally for rocket motors, (solid fuel and hybrid).

[pereduranofcourse]

@Atevra look, you can't have an aluminium nozzle when you have a very high pressure and temperature. Usually you would use graphite because it will not melt at high temperatures and will not burst at high pressures. and thanks for the google tip, i already knew, btw...

[Atevra]

@pereduranofcourse thanks for pointing out the aluminium nozzle

[NOBOX7]

well boys the design is perfecto,he

just needs better metals ,,lol

[conoba]

KAbooooom!

A nice explosion can be as entertaining as a good launch. It is fun either way and you learn if something works or not.

[GoibniuGodOfTheForge]

what was the fuel?

[Draxius]

maybe you souldnt use nos next time

[Zobrak80]

BLOOD!!!

[david1513]

water pipe is cast iron use gas pipe though with out the galvenizeing on it,, and dont cry over your failures just carry on like it never happened,,salvage what you can from that pile of mess and carry on,,get back to work ok... dave coffin

[david1513]

here's some good advice to help.. use cast iron build a brass blow out plug into the main body, try useing nos and alchol like the germans did dureing ww 2 nitrus is the oxidizer and alchol the fuel,, take care be safe david coffin,,,

[Kilkman]

Maybe time to start engineering a weak point into the housing to prevent the obvious danger. So if it blows, it blows in a predictable manner.

[knikerpython2003]

hmm lawn mower not fast enough eh

[berin99]

oops likes like aluminum is not strong enough :)

[Rocketmang]

heheh, yep, time to try carbon fiber.

[Miata822]

carbon burns, would make a good fuel. try small stainless tube and a bigger nozzle to start.

[VooDooRocketry]

Aluminum is plenty strong