Spud Cannon Size

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SpudFiles Forum Index » General Spud Cannon Related » Spud Cannon Size

Spud Cannon Size

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cfrehr

Posted: 06/21/2008 21:44 PM Post subject: Spud Cannon Size

Private

Joined: 21 Jun 2008
Posts: 2
14.13 Spud Bux

I just made a potato gun using 2 feet of 4" pvc, 1 foot of 3" pvc and 1 foot of 2" pvc as the potato barrel. My cannon does not work well at all. Is the 2" barrel too short? im confused as to why my Big spud gun (4 feet) works worse than my Little spud gun (2.5 feet).....any answers?

MrCrowley

Posted: 06/21/2008 21:50 PM Post subject:

Blizzard of Ozz
<b>Moderator</b>

Joined: 23 Jun 2006
Posts: 6137
3165.90 Spud Bux

C:B ratio.

Your barrel is far too short. It should probably be 10-15' with a chamber that size. A 1' 4" chamber and a 5' or 6' barrel will be decent enough.

Lentamentalisk

Posted: 06/21/2008 21:57 PM Post subject:

Resident Tinkerer
Brigadier General

Joined: 07 Aug 2007
Posts: 801
818.16 Spud Bux

your barrel is only 1 foot long. given your chamber size, you should make it about 10 feet long, for maximum velocity.

The ideal chamber to barrel ratio (C:B) is approximately 1:1, in volume. Though people will argue over that number, it varies largely with projectile weight, and other such factors.

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