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which is more powerful?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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which is more powerful?

Unread postAuthor: coujin » Sat Dec 26, 2009 5:17 pm

i was just wondering which would be more powerful if built the same size, a inline or over and under?

and they will be powered by propane.
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Unread postAuthor: jrrdw » Sat Dec 26, 2009 5:26 pm

I would have to say inline, no bends to slow things down...
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Unread postAuthor: coujin » Sat Dec 26, 2009 5:27 pm

okay, would you say that there is a noticeable difference between the two?
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Unread postAuthor: jrrdw » Sat Dec 26, 2009 5:30 pm

Depends on how small you can measure time....millaseconds???
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Unread postAuthor: SpudBlaster15 » Sat Dec 26, 2009 5:32 pm

Do you mean the same length?

If so, the over/under will be more powerful, since you will be able to use a longer barrel for the same overall launcher length.

The 180 degree bend does slightly reduce flow, but the energy losses are not significant.
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Last edited by SpudBlaster15 on Sat Dec 26, 2009 5:34 pm, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 26, 2009 5:33 pm

Depends what you mean by "built the same size"

If you mean the same overall length, then an inline would have a shorter barrel and chamber than the over/under and this would negate any performance gained by lack of bends.
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Unread postAuthor: coujin » Sat Dec 26, 2009 5:33 pm

ah so you cant really tell that theres a difference. okay i've got more of an idea on what to build now :) thanks.

coujin wrote:okay i understand now.


Edited by jrrdw.
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Unread postAuthor: Daltonultra » Sat Dec 26, 2009 5:51 pm

If you mean OVERALL length, as in the length of the entire gun, then obviously an inline would have a massive disadvantage.
If you mean COMBINED length, as in barrel+chamber as measured individually, then the bend is the only disadvantage to the over/under.
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