jackssmirkingrevenge wrote: Something like this will probably work better but make sure you have a safety pop-off or burst disk in your circuit, if a seal fails inside then it's full reservoir pressure to your system.

I bought several of these, work wonders. Air flow is healthy and stable.

If the combustion chamber is on board and metering unit is remote what does the cartridge do besides holding the projectile obviously

So it's basically a rocket but the propellent isn't onboard... The twist to cancel the rifling is very well thought tho.

Tried to make one and it did work, a lot of little holes tho. Kinda impressive open a 1000 psi valve with a light press of your thumb.

Any thoughts on these?
Seems cool to make grips or stock... Dunno if scam tho.

Boy pumping that looks uncomfortable af... No to mention if the barrel is any shorter it's gonna be right next to your face

Me neither, I only went back to this topic because I have been eyeing the PDI barrel for VSR for a few years and they gradually changed from 6,01 to 6,08. I just noticed 6,08 very recently, before it was 6,05. Since it's claimed to be cold hammer forged I don't think they did it to reduce cost, sinc...

Just a quick thought, considering BB diameters vary, maybe wide bore barrels are better because compared to the bore size the variation of the bb diameter represents a smaller percentage? Per example: a bb is about 5,95mm +- 0,01mm, so maximum of 0,02mm between bbs. With a 6,01 barrel that's 0,05-0,...

jimmy101 wrote:If you want to be taken seriously quit using the stupid name "HHO". There is no such thing. You are using 2H2 + O2.

Give him a break Jimmy, the guy is probably the only one around here who built a self contained hybrid repeater. He is more than worthy of being taken seriously.

Just buy one of these, 40 bucks shipped. Healthy exercise and environment friendly.

Meanwhile ordered a PDI spring and machined a carbon fiber+SS piston and bearinged guide, gonna compare the performance with the floating oring version.

Diminished the leak, however the friction of the o-rings became problematic, the FPS actually rises a little when the pressure starts to drop before start diminishing.
FPS is also lower than the floating o-ring version, the piston is moving slower.

Well butter me rear and call me biscuit, I did not expect this [youtube][/youtube]
This would cause the need to increase the pre charge pressure and make the leak less noticeable.

Oh that. Well I built some gliders from kits(pretty good ones, balsa wood with proper wing structure and fuselage) when I was a kid and most of them had this so I kept it here, plus the tail wing is small so I thought it might add stability?

Quick update: The seal got better after I used slightly larger o-rings. So I'm gonna redo the aluminium part, make it squeeze the o-rings a bit, also gonna change the rear to thread mount instead of just o-rings slide on. If this works would be great, the thing is real crisp to shoot and quiet. The ...