SpudFiles

I've noticed that variability also. I wonder what that is? Deformation of the seal that creates a detente? Temperature? I play with the valves at the building center and notice that new ones are often very stiff. My 3/4" ball valve gun had a heavy hammer driven by bungees that easily overcame openin...

Stain is drying on the stock now. I'm going for something like... https://atlantic-firearms-prod.s3.amazonaws.com/media/sylius_shop_product_original/product/kel-tec-rbd-survival-223-rifle-11.jpg but more plant based, sustainable, carbon neutral and stuff. Also better trigger which isn't saying much ...

I have been seeking alternatives to paintballs for some time and thought I had the perfect solution in the "dimpled wax shell powder balls" but they are now not available apparently despite the continued listing by several retailers. I tried some yellow foamies which are fairly precise (52 grains+- ...

Velocity test on a can of water:



Almost finished...

It has a 1/2" qev, 0.875" barrel. My first breechloader I think. Barrel short enough to muzzleload an arrow.

Going for a California-legal look.

I hope to see you build this with shutoffs on the pilots for testing... it's very interesting. I had planned a 3 by 1" valve launcher piloted by a 1" until I realized one of the three is damaged. Piloting 2 by 1" with a 1" seems extreme, though I got the valves for free so whatever, right?

I was planning the same with irrigation valves. I guess the question is: how to know which one is opening first? If we knew that we could alter the tube length to the pilot valve to synchronize the openings of the main valves. Using identical-ish valves on a long barrel launcher with heavy projectil...

When I tried this I had similar results. I tried adding mass to the nose, tried some poorly made fins, and I think my long barrel helped, but never got more than 150 feet (measuring straight... projectile often covered much more than that in various directions) Perhaps with enough mass on the nose a...

added some furniture sv1 with stock.JPG Fairly ergonomic if I raise my right elbow until my arm is horizontal. Every time I hack one of these together with an assortment of adhesives and fillers instead of fittings and craftsmanship I tell myself it's the last time. It often leaks, and then it gets ...

Modify blowgun for better flow.

The offset bits are very appealing. Informal balance FTW!

Clean and simple, thumbs up!

Is this the fastest 1" sprinkler valve launcher at 100 -105 psi with a 26" barrel? After much chronograph testing and many spurious readings (up to 897.5 fps) I revised my set-up and got: IMG_5959.JPG with a 1.75 gram plastic and duct tape cone. The cone did multiple shots, 742, 760, 772 (from SV1) ...

I think there is other stuff going on that makes it hard to measure peak pressure. There might have been part of a thread here about it. Pressure gauges need time to indicate, and moving pistons create pressure spikes that last for very short times. I think to measure momentary pressure there are st...

I think we would all like to see something like this. I've played with the concept a few times but the big problem is the inefficiency of the spring piston set-up. I think they rarely get better than 35% efficiency https://airgunwarriors.com/resources/library/Internal_Ballistics_of_Spring_Piston_Air...

It's good to know I am at the extremes

The Hunter valve that I converted to barrel seal might give slightly better performance but the main advantage is how fast it seals when using a bike pump. The chamber seal version takes 3 pumps to seal. The barrel seal holds air instantly.