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So back in 2018 or 2019 I made an HPA engine for my old Double Bell VSR-10 and quite liked it, but eventually I got a Wolverine BOLT in a separate gun and the homemade engine broke not long after.
The cause was I didn't use any glue to affix a gasket into a little piston and the gasket came out, and since I pressed and glued the engine together there was no fixing it.
The second failure was the trigger valve, I assume because I didn't know about oils back then and had used WD-40 on the O-rings.
Excuse the terrible camera quality, this was an extremely bad phone.
Fast forward to 2 weeks ago, where I made this here GEN2 engine
So the major improvements
Not inside of a cylinder, replaces the cylinder
Better nozzle geometry
COMPLETELY DISASSEMBLES
Better refresh rate
Lower volume (more controllable power)
Better trigger valve
More simple
Cooler looking
So this system is a QEV (Quick Exhaust Valve) with a 2/3 (2 position 3 way) normally open trigger and can output probably 4J with a good length barrel and heavy BBs, and will do so with good FPS consistency.
Not really much else to say except that I'll be putting it in my current ultra custom VSR-10 and selling it once I am pleased with how it shoots, so look forward to that upcoming post if you are interested.
Also, here's a blank firing demonstration
Another thing, you guys are completely allowed to make these if you so desire, but you need an understanding of airguns and air systems.
Still, 13-14 year old me was able to build my first one which lasted 30K shots or so, so it's not rocket science.
For better information on these, look of QEV airgun and QEV pen gun/flashlight gun and maybe try building one of those first as they aren't so hard.
The cause was I didn't use any glue to affix a gasket into a little piston and the gasket came out, and since I pressed and glued the engine together there was no fixing it.
The second failure was the trigger valve, I assume because I didn't know about oils back then and had used WD-40 on the O-rings.
Excuse the terrible camera quality, this was an extremely bad phone.
Fast forward to 2 weeks ago, where I made this here GEN2 engine
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So the major improvements
Not inside of a cylinder, replaces the cylinder
Better nozzle geometry
COMPLETELY DISASSEMBLES
Better refresh rate
Lower volume (more controllable power)
Better trigger valve
More simple
Cooler looking
So this system is a QEV (Quick Exhaust Valve) with a 2/3 (2 position 3 way) normally open trigger and can output probably 4J with a good length barrel and heavy BBs, and will do so with good FPS consistency.
Not really much else to say except that I'll be putting it in my current ultra custom VSR-10 and selling it once I am pleased with how it shoots, so look forward to that upcoming post if you are interested.
Also, here's a blank firing demonstration
Another thing, you guys are completely allowed to make these if you so desire, but you need an understanding of airguns and air systems.
Still, 13-14 year old me was able to build my first one which lasted 30K shots or so, so it's not rocket science.
For better information on these, look of QEV airgun and QEV pen gun/flashlight gun and maybe try building one of those first as they aren't so hard.