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Steampunk Sidearm

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Steampunk Sidearm

Unread postAuthor: mako » Tue Apr 10, 2018 12:01 pm

It's been a LONG time since I was on Spudfiles...

In the interim, I got a minilathe and I've played with it a lot. Obviously, airguns are the goto project for a lathe and since my family used to play a lot of airsoft, I went with an airsoft style system. In steampunk. Obviously.

Barrel and Chamber Exploded view;
Image

Barrel and chamber 90% Assembled;
Image

Barrel and Chamber assembled;
Image
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“Whenever you find yourself on the side of the majority, it is time to pause and reflect.”

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Re: Steampunk Sidearm

Unread postAuthor: jrrdw » Tue Apr 10, 2018 1:29 pm

What are you going to use for frame and grip?

Welcome back! :mrgreen:
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Re: Steampunk Sidearm

Unread postAuthor: mako » Tue Apr 10, 2018 2:19 pm

It's good to be back. I really enjoy Spudfiles, particularly all the great guys on here.

I've got a peice of curly red oak I cut into two identical grips. They'll sandwich the single action trigger mechanism and a white pine spacer. I'm away from my shop right now, so pics when I get home.
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Re: Steampunk Sidearm

Unread postAuthor: mako » Tue Apr 10, 2018 7:27 pm

The frame and grips will be the same piece, similar to the flintlocks of ye olde days.
The pictures aren't perfect, so if you can't see it well, the red wood is some beautifully curly red oak I bought from a local specialty lumber mill. Once it's shaped and polished, it ought to be gorgeous, especially with that white pine stripe from the spacer.

Here it is uncocked;
Image

Here it is cocked;
Image

The hammer spring is a piece of piano wire bent to the right shape. The hammer and spring are just scrap steel and key stock, (respectively) bent and shaped as needed. The hammer is a pretty blocky due to weight requirements; it's propane powered like most gas airsoft guns, so I need the hammer to over-travel, strike the valve, and return to rest without fully emptying the reservoir) That makes the hammer pretty ugly, so I prettied it up by doing a heat-bluing job on it. You can't see it very well in the picture, but it starts out deep blue, goes to peacock purple and down through the straw colors to steel-grey again. It's the first time I've tried heat-bluing and it turned out so well, I did it to the trigger, too.

I've tested it out by holding the mechanisms together and firing and it works. I had to adjust the fit of the o-ring on the valve stem, because I had been testing it with just compressed air. When I used propane (higher pressure) the o-ring slipped down the stem and maintained it's seal, even with the stem completely depressed! Enlarging the o-ring groove fixed this problem. Now, with tests, I can get multiple shots from a single charge of propane. Now, to figure out a propane charger nozzle that doesn't leak and freeze up my check-valve o-ring...
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Re: Steampunk Sidearm

Unread postAuthor: jackssmirkingrevenge » Wed Jun 13, 2018 4:23 am

Welcome to the minilathe master race :D

Your stem o-ring needs better support, ideally the only exposed rubber should be the diameter that seals. How are you re-loading BBs?

I really like the hammer spring mechanism, very unique. Looking forward to see it finished!
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Re: Steampunk Sidearm

Unread postAuthor: mako » Fri Jun 15, 2018 11:16 am

Glad to finally have joined it! :twisted:

Are you referring to the o-ring you can see in the picture where it's assembled? If so, that's not the stem o-ring, that's the fill port o-ring.

Thanks! I may modify the trigger design, but I'm keeping the color bluing... it's so cool!
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Re: Steampunk Sidearm

Unread postAuthor: jackssmirkingrevenge » Fri Jun 15, 2018 2:42 pm

I edited the image of what I assume is you stem valve to show what I mean:

valvestemmodmake.jpg
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Re: Steampunk Sidearm

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Re: Steampunk Sidearm

Unread postAuthor: mako » Mon Jun 18, 2018 2:21 pm

Oh, derp... I forget who I'm talking to. Yeah, I see what you mean now. Machining it like that WOULD cut down on any chance of blow-by knocking the o-ring out of place.
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Re: Steampunk Sidearm

Unread postAuthor: jackssmirkingrevenge » Wed Jun 20, 2018 3:53 am

It's the solution I had used for the Apace Fireball rebuild.
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