it past over 1 year and still cant figure out how to make a new topic ,, admin explained me couple of times but i just cant find "new topic" like it was old times any how i'll ask here, where the heck do i get particles of dust inside barrel ( accuracy issue ), unscrewed airtank couple of times and...

Ah good, he's still alive! :) Interesting observations. I always figured that in hybrids, since the mixture is pressurized the homogeneity is achieved without the need for further mixing. Have you tried filling from the reservoir and leaving it for a few minutes to see if it makes a difference? I d...

Came to see a Penguin

I like it, and also, it is the perfect "weapon" to annihilate the state bureaucracy and its henchmen that take many hours from our ephemeral and interesting existence. You waste my time, and I pierce you!

So you guys were on the money. I was lean for sure. I think higher mixes helps aswell. I have been successful up to 30x with roughly 20psi propane 420psi air. Now it seems to be on par with the phenumatic counterpart. I do intend on mounting it on a stock or something of the sort. Like a bulpup conf...

Also it is a barrel sealing piston. The "face" sits inside the barrel instead of pressing up against it. The rear oring is a "floating oring" so air passes one way to fill the chamber. It cannot flow in reverse.

Does this make any sense? Art is not a talent I have...

Thanks again, although I believe I've found a different solution. Crude magazine.jpg This is a crude magazine I've cobbled together with some brass pipe, compression springs, epoxy and heat shrink tubing. The capacity is about 50 .177 bbs. There's a large "L" shaped groove I cut to allow the followe...

Mr Foo hit on the major point...the ends are where most failures occur first, and it can be pretty dramatic...even deadly. Wasn't too long ago that a fellow was working on a modified Benjamin Discovery and had the valve blow nearly through his thigh...barely missing the femoral artery. Another fello...

There's also the question of how it's capped, etc etc. Pressure vessels aren't, perhaps, rocket surgery, but there's still a lot of hard theory involved, and major consequences if you get it wrong. The only way to be sure, without putting yourself in danger, is hydrostatic testing. Fill it *complete...

I just want to note that a proper weld joint is MUCH stronger than any threaded arrangement. Note only that but a proper weld is stronger than the base metal in most cases. The primary concern is most certainly HAZ and proper execution. The chamber on my air rifle is a section of 3/4 hydraulic pipe ...

If I had the money, I'd make 3 of every cannon I have and test two to failure under different conditions. That way I'd really know the safety factor in a practical way and discover the weak spots and failure mode. Unfortunately, you could buy a nice car for what all that would cost, so it is what i...

I was hoping to find a solution to avoid removing the spark plug. I am also putting some thought into a glow plug ignition instead. Trial and error... I was even debating placing a "silicon desiccant pouch" in the chamber to absorb excess moisture.. I figured it would end up fired out the barrel so ...