Very interesting and another illustration of how 3D printing is allowing innovation that would have been difficult to flesh out with traditional manufacturing techniques.

It would be nice to see it in action at that rate of fire

An interesting question and I thought worth investigating, so I made the following modifications to the Mini Hybrid II : Blunt endcap insert: 20231123_211452.jpg Insert bore tapered: 20231123_214925.jpg I fired two shots each with both endcap variations, for each shot I used a 63cm long 0.177" barre...

This is very interesting. Intuitively, the highest pressure accumulated before burst would result in the highest velocity. It would stand to reason, though, that you want the disc to burst late enough to raise the chamber pressure sufficiently, but early enough for there to be unburnt fuel mix bein...

Am I off my mark? The way I understand it, in a pneumatic the pressure is more or less constant while in a hybrid it's a brief spike. If we have a disk on a chamber that bursts at 1000 psi, then by filling that chamber until the disk bursts there will be 1000 psi of air to push the projectile. With...

Ok ChatGPT are there any real people left on the internet?

X2 Almost 200 posts and not a single useful one that I've seen. Maybe I'm just gettin old and cranky at this point lol. Your continuous and immensely annoying thread necromancy serves no purpose beyond increasing your post count, and making forum utterly unusable for anyone interested in actualy dis...

nice gun and great work How, in the name of all that's holy, could you possibly know that? The photos are dead, the videos are private, and apart from one post in 2019 the whole thing hasn't been touched since you were literally in diapers. SpudFarm themselves haven't posted since 2017. Your contin...

I'm not sure that the speed of sound is an overly useful measure. As I understand it, and I've probably totally misunderstood, even in a "conventional" firearm, the combustion is subsonic even though the actual projectile velocity can be at least supersonic; and that it's pressure and the time the p...

A few thoughts in no particular order.... 1 - Post-combustion chemistry absolutely matters. It can drastically alter the local sonic velocity. 2 - Traditional powder-based guns can go much faster than OP's listed 5200 ft/s. I've personal experience with a gun that runs at 8,900 ft/s. 3 - I'm a bit b...

Very interesting. At those velocities, does the sabot shatter on exit? I would be lying if I said I haven't been thinking of ways to pack a 2 stage gun into a rifle-esque design. Well, they're multi-piece designs that are literally held together by the bore of the gun. The moment they're clear of t...