Piston materials question
Posted: Mon May 04, 2009 6:32 pm
I'm building a steel cannon out of an old oxygen welding tank (I already cut it, and am still alive) and had some engineering questions for the piston. I plan to take the cannon up to about 200 psi, and with a barrel inner diameter of 3 inches, that means about 1400 pounds of force on the sealing face. I was considering using some 1/4" thick fiberglass for the sealing face, and then 1/2" polycarbonate for the parts that hit the back of the pilot chamber upon firing. Do you guys think these materials are appropriate?
(the piston diameter is 4 inches)
I was thinking fiberglass because it has good tensile and compressive strength, and polycarbonate because it has great impact resistance)
I plan to post up a complete worklog when I get the time, but here is a render of the piston, and a teaser pic:
Thanks for your help
(the piston diameter is 4 inches)
I was thinking fiberglass because it has good tensile and compressive strength, and polycarbonate because it has great impact resistance)
I plan to post up a complete worklog when I get the time, but here is a render of the piston, and a teaser pic:
Thanks for your help