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Second attempt at combustion

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Second attempt at combustion

Unread postAuthor: BadDNA » Fri Oct 13, 2006 8:21 am

Built a new cannon, this one for some reason, with a better C:B ratio doesn't seem nearly as good as the first. I used 3' of 1.5" sch40 for the barrel, and calculated back from that to get a 13.5" length for a 3" chamber at roughly 1.5:1. With all the fittings etc, it seems the C:B ratio is bigger than that, but bigger is better than smaller I thought. Anyway, here it is, I've got some tweaking to do with it still, I made it with a removable barrel for more adjustability.

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Unread postAuthor: mark.f » Fri Oct 13, 2006 8:41 am

Nice. I like how you calculate your optimal chamber length instead of adjusting the barrel to a small chamber. That way, you can use as long of a barrel as you feel like.
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Unread postAuthor: squeaks » Fri Oct 13, 2006 12:55 pm

Didn't I see this posted earlier? Owell, never mind. Looks better than your last gun, so I don't have a clue why it doesn't work as well as your last gun. maybe you need to play around with your ignition? Have fun experimenting
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