Greetings, fellow tinkerers :) after finishing my first Corona project - a 12mm, 140J PCP operated with a paintball tank (I'll post more about that, I promise) I'm tinkering on a hybrid again. My first try 10 years ago was a rather normal 14mm, 6x piston hybrid, but I had problems with the valve sea...

I used to fill my first hybrid by injecting the fuel into the bicycle pump (suction hole on top) with a big syringe while drawing the handle up, and continued to fill plain air to the desired pressure.

You'll need to seal that .22 if there is any pressure in the shell.

CO2 tanks have a nominal pressure of about 58bar at 20°C, that's why all those paintball air regulators reduce the pressure from whatever is in the bottle to that level (850psi) so air and co2 is interchangeable. About the max. working pressure, looking at the steel tank I have here I think the mark...

Having the o-ring go past the transfer port in high performance applications is not really a good idea. Well, you were right. :roll: Did work perfectly at the first try on the PCP air pump, everything sealed fine, popped open nicely at about 30bar - and sheared the top of the O-ring clean off. Seem...

Ahhh, right to the next sore point :D I have a little 3mm PA plate (will replace it with rubber) where the angled plate hits the end of the casing, you can see it in the second picture of this post: https://www.spudfiles.com/viewtopic.php?p=389404#p389404 But right, that bolt builds up a lot of kine...

Hi, well, so much for "Keep It Simple". :roll: What was 2 parts - bolt and stem - is now made of 7 parts: stem, angled plate, bolt (only shown assembled), front bolt (reworked .357 casing), insert, washer and screw. I turned off the rim and recessed the base of the brass casing, so there is a 0.3mm ...