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  #21  
Old 02-09-2017, 12:23 AM
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Originally Posted by weldor2005 View Post
Our stored pressure ABC (Dry chemical, not CO2) units are pressurized at ~125 psi.

I am starting to wonder where this thread has morphed to? I thought we were keeping it simple and safe for kids, and now we are looking at heavier metal projectiles fueled by hydrocarbons?
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Ya know, your absolutely right. My apologies to gimpyrobb for dragging this thread off the rails...
No worries guys, I am not on a "mission", I mentioned it to my best friends kid and he wanted more info. I might just make a quick and dirty one that we can tweek.

I enjoy the tangents. I once saw a guy put a mix of oxy/acet into a spud gun for a distance attempt. I will NEVER try that one.
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  #22  
Old 02-09-2017, 12:37 AM
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No worries guys
I enjoy the tangents. I once saw a guy put a mix of oxy/acet into a spud gun for a distance attempt. I will NEVER try that one.
Why not? Did it burst on him?

Some of the mechanics I worked with made a launcher out of hydraulic tubing that had been ruined. It would shoot a 'D' sized battery almost out of sight..it was oxy/acety fueled

We had great fun shooting at ground squirrels about 500 yards away
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  #23  
Old 02-09-2017, 12:44 AM
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My daughter created this aircraft for a science project in middle school. The tube is a florescent light protection tube with a plastic Easter egg for a nose cone. Cardboard fins and a bunch of duct tape as well as a 2-liter bottle round out construction. I believe they used a manual tire pump to pressurize the vessel but I don't know the pressure they went up to.
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  #24  
Old 02-09-2017, 08:55 AM
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Why not? Did it burst on him?

Some of the mechanics I worked with made a launcher out of hydraulic tubing that had been ruined. It would shoot a 'D' sized battery almost out of sight..it was oxy/acety fueled

We had great fun shooting at ground squirrels about 500 yards away
Yup, it shattered quite violently. I was amazed he wasn't hurt.
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Old 02-09-2017, 02:11 PM
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A tire seating air blaster (I'm not sure what they are called) with the air pipe replaced with a straight pipe makes a great apple gun. An apple, just slightly larger than the tube, and crammed into it will go a couple of hundred yards. The rate of fire depends on the size of the compressor used to recharge the tank. It could be used for spuds too, but we had a bunch of inedible apples so that is what we used.
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Old 02-09-2017, 03:02 PM
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A tire seating air blaster (I'm not sure what they are called) with the air pipe replaced with a straight pipe makes a great apple gun....
My young one welded up a fitting to a 20 lb. propane tank and added one of those fast pneumatic dump valves as are used to blow debris out of dust collection systems. I think it's maybe 1.5" ID. He added a 10 foot pipe barrel (2 - 2.5" ?). Thing is scary. Never took it to a place big enough to test it for distance.

He had another made from PVC with 3 big pipe reservoirs and I think a couple of those lawn sprinkler valves. It would be ideal for launching rockets made from paper tubes covered with masking tape.

http://makezine.com/2008/12/13/compressed-air-rocket/
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