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Re: Dangers of High Speed Pneumatic Gun
Daniel,
You are correct... We have always used cylinders with 1/8" NPT ports before... And many valves usually don't have NPT fittings. I wonder if this isn't a typo...
Mike
Eric,
You are correct about requesting re-inspection.
About maximum safe speed, I'm thinking that <R94> applies here...
Any metal will fatigue and break if you hit it hard enough. There is no use in me questioning the 20"/s figure as a team can use any manufacturer.
If the team employs a precharged piston, venting to atmosphere without going through a valve with a very large cylinder port, the impact of the piston against the end of the cylinder housing could be very great indeed.
Since I can't make an engineering decision a priori, I'd put the burden of proof for a safe design on the team via <R94>...
Mike
__________________
Mike Betts
Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013
As easy as 355/113...
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