I do the exact same thing, never had a single problem.

1000 meters tho? seems a little high, correct me if im wrong.

i would use a sprinkler valve, but the person who i am making it for wants to spend no more than 50 dollars, but he does however have a 1 inch ball valve. if it wasnt for these damn -5 temperatures i could acctually test it's operation.....I hate iowa

This is actually my first coaxial, if i can get the pictures to come accross my network id show you the pictures but other than that all i've really built are marble cannons. When it warms up i will try these suggestions thank you very much

My piston is just a sanded 3 inch endcap inside the 4 inch chamber and the barrel end has a rubber coupling for the piston (endcap) to seat against. and there is about 2 inches of space between behind the piston. It does create a very tight seal with no leaks. Should i perhaps fill the piston so it ...

i have made a barrel sealing coaxial air cannon and the piston seals just fine, but when i pilot the air, the piston does not move back and stays sealed against the barrel until all the air is out of the chamber. my pilot is 1/4", chamber is 4" di., and barrel is 3/4" di. any help would be much appr...

really like the design of your electric box. i made one with a fly-back transformer inside, but when i screwed it together, on of the screws accidentaly scraped the insulation off and contaced the screw, and when i hit the power, i was standing in sandals on wet ground, 150Kv stings a lil

i always hated piloting towards me, i usualy use air compressor hose and face it away from me

i wish i could get cheap fittings, i live in the midde of nowhere and the closest harware store way over charges...scheiBkopf bastarden...

you know, after i think about it, i think it is money better spent launching projectiles in real life then rotting in front of a tv screen

well if you wanted 300 psi you could first get a metal chamber, then a ball valvwe and a 12 gram CO2 adapter and use a couple cartridges per shot, the ball valve would just be closed after each fill so no air would leak back out the adapter, just curious tho, for a high powered shot like that, what ...

if you want a good looking pilot valve you could always use a modded sprinker valve and just elbow it around out of the way, but i do know what you mean, i just finished a steel marble gun (will post when i get my camera back) and when i tried to pilot with the air gun trigger it would just plop out...

i tried one of those advertise for stuff things before, they just tried to rip me off, goodthing it wasnt my computer or email address, although i did want the X-box 360 they said they would give me

why so hostile?

thats what drinking does to ya