With some paint

There is a loading gate which is not a tight fit so it lets out enough air to keep the balls pushed up, it fires really good at 100psi.

Bit of a cosmetic update, just need to get a spring on the loading gate, makes a mess if I forget to close it

pdf here: https://archive.org/details/Caselman_Ai ... 9/mode/2up

another version: https://ia800207.us.archive.org/18/item ... prints.pdf

hectmarr wrote: ↑

Thu May 06, 2021 4:49 pm

A safety valve for pneumatic installation that says 1.8K, how many bar or psi is it? It is a rupture disc of a pressure regulator and I do not understand when it is 1.8K ...

kilopascal ? Kpa. 1 Kpa = 0.01 Bar, 0.145 Psi. But 1.8K would be so low

In this specific case, 1.8K means 1.8 psi x 1000, it is 1800 psi, about 124 bar. Thanks for your answer. I confirm that is the case, a 1800 psi burst disk is typically one you will find on the exit side of a 850 psi regulator on a paintball bottle. A 3000 psi bottle will typically have a 5K disk, a...

Voila with a 1 meter barrel:



50cm barrel gives 319 m/s and 43J, 66cm gives 356 m/s and 53J

The blow forward bolt definitely works and is relatively easy to build:



What projectiles are you looking to fire though?

hectmarr wrote: ↑

Fri May 07, 2021 10:27 am

wow is supersonic!!

I imagine some of your creations also exceed the speed of sound even though your projects focus mostly on function and not maximum performance.

hectmarr wrote:I like holes!

The very definition of masculinity! Admiring holes and finding new and interesting ways to make them

Very nicely done! I really like the magazine lid.

A practical implementation of the valveless/popoff concept.

Would the quickness of releasing the slide valve make any difference on a QEV to the speed of the projectile being launched. Faster piloting means faster valve opening which means better performance, to a point. Here is a virtual launcher modeled in GGDT: https://i.imgur.com/jaMwUuq.png As it is, w...

Who were the guys building those beutifully machined sound guns ?

Think this it

How about 85,000psi