jackssmirkingrevenge wrote: ↑

Tue Feb 09, 2021 11:23 am

I'm guessing you had missed this one? viewtopic.php?t=26708

I DID, nice.

Also lol at hectmarr's last post.

Oh my goodness ! yes yes yes, "tame" is the correct word

jackssmirkingrevenge wrote:Finally had time to do some testing:

[youtube][/youtube]

Imgur album

Just what I need to dominate my mother-in-law

Nice electromechanical prototype. I did something similar, is what I showed, (thinking of feeding the automatic hybrid), with an advantage and a disadvantage. The advantage is that it is simpler, and the disadvantage is that I cannot exceed 9 or 10 bar, which is the maximum that the solenoid valve s...

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...

Avoid beating off in public. It'll get you on a list. Sorry, that was a cheap joke. An aluminium tank can only, AIUI, be rated up to 3000 psi. That's around 200 bar, and the absolute maximum safe rating, tank direct from the factory, you can possibly expect. However, liquid CO2 only requires a bit m...

hectmarr wrote: ↑

Fri Feb 12, 2021 6:45 pm

Look at this, it can illustrate for you how to work with rupture disc.

LOL, looks like the fittings salesman's wet dream.

I agree with what they tell you. For your first hybrid barrel a rupture disc system is the simplest thing to do and is VERY EFFECTIVE! :evil: You have to draw a picture of what you have in mind, hybrid barrel size, projectile type, fill pressure and all that. On the other hand, list your specific do...

Simple. In my case, (this is independent of the mixture retention system that the hybrid has, rupture disc, piston with pilot, o'ring only), for a given combustion chamber volume, I measured with my pressure gauge that with 6 pumps, I have 5 bar. As long as you give 6 pumps you will have 5 bar ... S...

Yes! If the amount of gas exceeds what your syringe can hold, get yourself a bigger one, or make one the size you need, with recycled materials. Example: If in the gun in the video I use 30 bar, the amount of air is 30 times 20 cm3, (which is the volume of my combustion chamber), about 600 cm3 of ai...

Will the fueling method of syringe work for up to 6x or maybe 8x? The biggest syringe that is easy to get is 70ml. If you fuel into a vented chamber you are probably limited to putting in no more than about 20% of the chamber volume. After that you'll be losing an unknown amount of fuel as it leaks...

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...

People have had success using a spark plug connected to a stun gun at 10x. I use a cheap stun gun and it's been reliable. I used one of those super cheap step up voltage thingies and it broke. It just stopped working. I think I even tried a second one if I remember right, and it broke too. Not sure ...

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 ...