farcticox1 wrote: ↑

Thu Feb 13, 2020 4:56 am

McMaster Carr have this in brass https://www.mcmaster.com/8950k552

Just wanted to say I went ahead and ordered a piece of this and is an excellent airtight fit for store bought 1/4" slingshot ball ammo, airsoft barrel wall thickness, arrived un-bent too. Good find!

Porting and piston form is going to be important to get air out of a short, squat, cylinder into a long, slender, barrel in a hurry. The big issue is, IMO, going to be changing the direction of the air, as such I'd probably go for a conical piston face mating to a conical cylinder end, with highly r...

Howdy Gents! Don't remember the last time I signed into the files and made a post. Honestly, I'm surprised I even remembered my pword :lol: Interested to see who all is still active on here from the old days! @PCGuy I like what you've done with the place! Anywho, I want to drop a quick thanks to eve...

You see a very good construction, (as always, in your projects). It is nice to see someone who has and carries out a project from these sides. I congratulate you, and I look forward to new things from you.
 

Ah, that makes sense. I should probably invest in making some of those since all I have are rings and buckets of sand to use until the gyms open back uip.

Thank you all for the support 8-) honestly pretty surprised to hear back from all of you so quickly haha! With your ever expanding knowledge and access to materials and tools, you'd think there are a few spudding projects knocking about in the works... NOW BUILD SOMETHING! :D Who ever said I stopped...

What's the construction? Using pure oxygen + fuel in plastic piping isn't a great idea. Maybe that's why you didn't actually fire the thing in the video.

farcticox1 wrote: ↑

Mon May 18, 2020 5:48 pm

127mm or 12.7mm

Good catch, edited.

Very very very good construction job, I like it! The weapon is a little gem, in my opinion. Sometime in about 200 years I will be able to approach its high level of construction. The best I have seen in this forum. Keep building your things, much need. Greeting

Nice work!

It is the same in airsoft, as you explain. The concept survives there.

I found this quite interesting:



The Tank Museum's channel in general is worth looking through, a lot of illuminating material that is very well presented.

This one is just a fun experiment to answer a question that's been nagging me for over 30 years. Demonstration is at the end.

that's a beauty! Can't wait to see it in action!

My new self-made short gun. It is a hybrid pistol, with a built-in air pump, that operates with 8x and five strokes only. It shoots common pellets, .22, and the firing barrel is 12 micro-ridged, 200mm long. My friend's chrono gave about 650 fps on 4.5 ml of butane. It weighs about 900 grams, and ret...