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Fist cannon

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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Unread postAuthor: Insomniac » Fri Feb 23, 2007 8:01 pm

Ok well I thought venting would reduce power because of this (they test a vented barrel at the bottom of the page)

What your saying makes sense though, it all depends on how the barrel vents are arranged and how many there are.
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Unread postAuthor: SpudBlaster15 » Fri Feb 23, 2007 8:24 pm

Hate to sound like an asshole, but while it appears you researched the propane meter and fan portion of the gun well, you dont appear to have done much homework on chamber to barrel ratios. Your chamber to barrel ratio is roughly 1.9:1, and you are losing substantial amounts of power. With a longer barrel, performance would increase dramatically. I suggest extending it to at least 6 or 7 feet. Decreasing the chamber size would also boost power if you want to maintain that barrel length.

Great job none the less, the paintjob is awesome.
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Last edited by SpudBlaster15 on Sat Feb 24, 2007 6:45 pm, edited 1 time in total.
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Unread postAuthor: joannaardway » Sat Feb 24, 2007 4:53 pm

Looking at this again, I feel my praise wasn't strong enough, so I'll re-attempt:

Excellent work - this is one of the finest first cannons I've ever seen - it easily beats the second or even third cannons of a large majority of people. Keep up the awesome work.
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Unread postAuthor: risto » Sat Feb 24, 2007 10:11 pm

wow. i'm new to this forum, but i've been working with potato guns for a few years now and you did a very impressive job. Especially for your first gun.

only issue is the barrel, like it was already stated, a little longer would be better.

Any way we could get a pic of you holding it, to see your stance and the comfortability of it?
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Unread postAuthor: itwentboom » Sun Feb 25, 2007 1:47 pm

I am trying a 10'5 barrel just waiting on my cam-locks. That is one upgrade im doing. Thanks for all the praise and barrel info. Look out for next week as my twin Mauler pneumatic will be complete. I also just got my chroni and will be testing different barrels and projectiles. Another combustion is also being made with two combustion chambers.
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