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Multy-stage combustion

A place to ask general spud cannon related questions.
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Multy-stage combustion

Unread postAuthor: chosen_way » Sun Aug 13, 2006 3:08 am

i just had the craziest idea, what you do is get a combustion cannon and a heap of smaller ones that can slide into each other, and set it all up so they go off 10 seconds after the other on so if you have 5 cannons, the first cannon is a would slide into b and the next into c the next into d the next into e and then set of e and then mid flight the next one would go off so on anf so fourth would this work? it might be classified as propelling an explosive out of a cannon so if it is just lock it.
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Unread postAuthor: killagorrila99 » Sun Aug 13, 2006 4:06 am

wow. stupidest idea ive ever heard. but if u want to waste that much propelant its up to u.
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Unread postAuthor: Atlantis » Sun Aug 13, 2006 8:10 am

I don't think it would work anyways. The ammo is propelled because the explosion is pushing against the ammo, if the gun is in midair the explosion will push against the back with a much greater force, the gun will fly back and the ammo will basically "fall" out of the barrel.
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Unread postAuthor: LucyInTheSky » Sun Aug 13, 2006 9:23 am

killagorilla, a waste of propellant?
Is propane really that expensive in austrailia?
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Unread postAuthor: spudkpi » Sun Aug 13, 2006 9:28 am

wow. stupidest idea ive ever heard. but if u want to waste that much propelant its up to u.


Thank you.
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Unread postAuthor: boilingleadbath » Sun Aug 13, 2006 7:53 pm

What's the advanteage?
Combustion spudguns are already capable of delivering several thousand fps (with proper ignition system and B:C ratio).

Until you start approching that velocity, complex systems don't make much difference.
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Unread postAuthor: benstern » Sun Aug 13, 2006 8:20 pm

boilingleadbath wrote: B:C ratio


never heard of that ratio! :lol:
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Unread postAuthor: M3NT4L » Sun Aug 13, 2006 9:15 pm

Yea what is b:c ratio. Anyways it isnt a good idea and its too much trouble, why do people have to go ahead and make complicated systems in order to have originality.
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Unread postAuthor: CS » Mon Aug 14, 2006 12:22 am

Frick'! lol

Ratios display a relationship between two numerical figures. So it doesnt matter which side of the : there on, as long as it is understood what side is which. Although, the ratio of Chamber and Barrel is usally stated and listed as C:B, instead of B:C.

Quite frankly I get annoyed at such posts... Personages stating ideas that they will never construct, and are far to complicated or plain in-effective. Like you know how many people have talked about PVC/ ballon cartiages? I dont think ive ever seen such a gun built in the spudding realm of guns.
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Unread postAuthor: boilingleadbath » Mon Aug 14, 2006 12:39 am

Ehh... yeah, what pimpmann said.
Methinks the people who commented about my "reversed" wording are just searching out any opertunity to up their postcounts.
Or, well, I'll give them the benifit of the doubt.

And now that I've gone and done the same, I best acctualy say something.

For high-velocity use, one will probably be best served by a relitivly low B:C ratio. The reason is simple; with high B:C ratios, each portion of gas does alot of work and thus lowers it's temperature significantly - note the condensing clouds of water vapor at the muzzle, folks. Lower temperatures mean lower mean gas partical velocitios - lower speed of sound - which (as all of us except "supersonic" acnolage) lowers the potential velocity.

Note that with the smaller B:C ratio, you'll really need a nice ignition system (with well distributed sparkgaps) to provide a fast pressure ramp-up.
Can't be wasting our precious barrel pushing things along at low pressures, especialy if you have any desire to get supersonic velocities!

("B:C" used instead of "C:B" intentionaly, to bother you inflexable peoples.)
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Unread postAuthor: chosen_way » Mon Aug 14, 2006 5:38 am

guys i did ask if this would work i didnt say it was going to work for sure, and who ever said propane is expensive is retarded a bottle of it is AUS$15.00 that is cheap for me. why is it when you post something everyone has to be reall mean about it and not just be nice and say that it wouldnt work and state why and no just say it wouldnt work it is a stupid idea.
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