A Different Air Cannon Design

This air cannon is very reliable and does not use a normal valve system. It was designed to take up to 1000 psi, and has a barrel 5 ft long and 2-5/8" diameter. At 500 Psi it fired a 2 lb. aerodynamic projectile about 1000 meters. This is a rough first draft of the video, let me know if you have any suggestions. I am thinking I could add addtional videos around this: higher pressure operation (500 psi - 1000 psi) How fast can it shoot without self distructing? Evacuated barrel - See how much difference this makes. A detailed design tradeoff video: What really matters in an air cannon design ? High speed video : This would be really cool, but the camera rentals seem to be really expensive. re-do it to remove the crying child and wild parrots ? :-) I was inspired to do this video after watching Destin's video on Smarter Every Day where he shot a baseball at 1050 mph:    • World's Fastest Pitch - Supersonic Basebal...