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Long a$$ marble cannon
Posted: Mon Jun 05, 2006 6:37 am
by rna_duelers
I plan to make a long marble pneumatic cannon useing a modded sprinkler valve and 6' of 1/2"pvc pipe and a 2' piece of 2" pipe for my chamber.I was wondering if some ine would be so kind as to GGDT at 120spi so i can see the distance and fps it would be greatly apreaciated.Ohh and does a marble fit cpvc better or pvc?
Posted: Mon Jun 05, 2006 6:44 am
by Benny
lol, GGDT said 37 fps with a 50 gram projectile and 100 psi, and it said the barrel was chocking flow.
Posted: Tue Jun 06, 2006 2:48 am
by rna_duelers
BAHAHAHAHA..lol,thats quite funny.But a marble isnt 50 grams is about 3-4 grams...But still thats shocking..lol
Posted: Wed Jun 07, 2006 9:54 pm
by taterjim
You can use cpvc without drilling it, The 1/2" pvc I also use is drilled with an 11/16. I have a marble cannon with a similar design to the one pictured and I have it mounted on a home made wooden stock . I installed sights on it.
It's kind of long but shoots really well. My other one is an under over design. The under over is a little easier to hold and shoot and has a longer barrel with yet a much shorter overall length.