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According to the equation, the calculated FPE is 124.106 ft-lb which is the FPE I shot the 123kg bear around 100 meters on a cliff around 39.99 degree incline which then fell into a bottomless pit in the dream last night (joking). I don't know where did I go wrong in solving the equation.

Update if anyone is still interested. Got a new Z valve from Huben today. Ordered the one that came with a power plenum. Problem is that the fill probe is too close to the plenum and the coupler from my yong Heng cannot fit. But was able to find a temporary fix and now it's working great. The...

Update if anyone interested. Today, I tried to make sort of like a plenum using a co2 coupler with G1/2-14 thread on one size and m18 thread on the other. Used a tiny end cap thingy that came with the valve I have on the m18 side and the G1/2-14 thread on the coupler fit into the valve nice and...

Thanks for the advice, heavy_impact. So, 10cc is as per most post I've read would be 10fpe increase theoretically. Just need to figure out a way to measure thread sizes or a visit to lathe shop. I tried CNC router threading with a CNC I assembled out of plywood but didn't worked out well. And...

Good to hear that you like it. I'm trying to improve the build so that I can make my own homemade one with a lot of customizable feature based on this build. With better hammer adjustment, port sizes, valve and adjustable regulator built into the action block, adjustable 2 stage trigger and...

A broken car window and a banquet of flowers for my wife. Trust me. It's airgun related.😉😉

I did my tests this morning and came out failed happily. Changed to bigger port, removed the spring behind valve stem, set set point around 130 bar and installed short stiff spring that would reach its uncompressed length before the hammer hitting the valve. There was no change or rather a...

Thanks for the Advice, Long_Gun_Dallas. Tomorrow, I'll try that or some kind of other SSG with the same principle as there are some limitations because of the design of my gun. The principle behind is to stop the hammer spring before the hammer has touched the valve stem. That might definitely...

So, that means I need a bigger port? I do have a valve with bigger hole on it around 5mm. And I could just change the transfer piece behind the barrel. I know most airguns you guys have had transfer port made into barrel itself but mine had two pieces. One solid barrel with it's bore as it's...

Hi everyone!! 🤗 I'm new here and would like to put up a discussion on DIY airguns built with some AliExpress parts. For now, I don't own any big branded airguns. Neither PCP nor break barrel as the place I live in doesn't have much suppliers. So, my only option (sort of) is to buy locally made...