Alanstone wrote:Do you say the pressure is to high because of your butane measuring system?
My weapon would not support that mixing pressure at the time of the explosion. I'm shooting at 5x - 7x no more. I have planned to build a more solid weapon to go up to about 15x, but at the moment everything is built for less pressure.
What you propose will certainly work, as long as the air - gas mixture is stoichiometric, regardless of the pressure used.
In my case, in the present, to work at 5x, my values are these:
Volume combustion chamber - 40 ml
Amount of butane - 10 ml
pressure mix 5 bar
amount of air - 200ml.
To work as you propose I would need
Volume combustion chamber - 10 ml
butane amount - 10ml
pressure mix 5 bar
Air quantity 200 ml.
With a 10 ml combustion chamber, the force of the shot falls a lot, I've tried it.
otherwise, to maintain my 40 ml combustion chamber volume, I would need:
combustion chamber volume - 40ml
gas volume - 40 ml!
amount of air - 800 ml
Mixing pressure - 20 bar
Surely it can be used for a hybrid of 20 x or more.
I add
I mean that a combustion chamber of 10 cm3, in my particular case, to shoot at 5X, is very small. A 20X would work very well, solving everything else. I am referring to the system of closing the weapon, piston valve, rupture disc, etc, and the method to completely clean the camera after each shot, and the method to understand the gas and then the air in an almost automatic way, just by touching a button.