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by Anatine Duo
Fri Jan 17, 2020 6:41 pm
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compact precision launcher

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.
by Anatine Duo
Wed Apr 15, 2020 6:28 pm
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Re: Question regarding spigot mortar style ammo.

I like your thinking. I fooled around with the dowel inside the hollow projectile idea too, but gave up because I am lazy.
by Anatine Duo
Sun Dec 20, 2020 8:46 pm
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Re: My first working pengun- ammo questions...

looks fun... I really need to make one too
by Anatine Duo
Wed Feb 03, 2021 10:16 am
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Re: "In the world of spuds today"

Looking forward to seeing progress!
by Anatine Duo
Wed Aug 18, 2021 6:45 am
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barrel thoughts

I've been thinking (uh oh) again about barrels. First, rifled chokes. I have a scrap .22 cal that maybe could be used as a rifled choke on the end of a smoothbore barrel. There is a hypothesis that a high speed slug slamming into the rifling might be bad for accuracy, but at pneumatic velocities pro...
by Anatine Duo
Sun Aug 22, 2021 8:02 pm
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Re: barrel thoughts

So interesting! I was also considering modifying a current coax muzzleloader to have a longer barrel... if successful there is huge potential for adding rifling or choke or simply barrel length.
by Anatine Duo
Sun Mar 20, 2022 8:56 am
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Re: Little help with my first prototype

Looks fun! I agree A is oversize. The reservoir will lose pressure every shot, and if A is not very much smaller than the reservoir, that loss of pressure will be quite noticeable every shot. The hammer valve can have a self regulating effect but that is totally different technology. I have a slide ...
by Anatine Duo
Sat Mar 26, 2022 7:48 am
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Re: A bit of Nerf fun

another nice one... reminds me of Fallout
by Anatine Duo
Sat Mar 26, 2022 7:47 am
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Re: Little help with my first prototype

I think that the pressure drop is for the chamber. When you see the warning about barrel choking flow it's a sign your chamber is too large for the barrel... should be nice and loud but maybe not the balanced performance you want. Increasing barrel diameter nearly always increases energy, and veloci...
by Anatine Duo
Thu Mar 10, 2022 4:27 pm
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the air cartridge we wanted

Joerg's new toy. I fooled around with this cartridge design decades ago but gave up because it was long before 4500 psi handpumps were available. This sparked interest in it again, maybe with a 40mm size cartridge 8-) ... maybe rimless for better feeding in JSR's brain. https://www.youtube.com/watch...
by Anatine Duo
Sat Apr 02, 2022 7:46 pm
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Re: Throwbag Cannon

More important for me is the failure mode. PVC makes sharp shrapnel, most ABS yawns or makes squared off pieces.
by Anatine Duo
Sat May 07, 2022 7:29 am
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Re: Armadas 1500 II (hybrid pump rifle)

Sick! Looks very well put together. Inspiring actually!
by Anatine Duo
Mon Mar 07, 2022 11:44 am
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Re: tennis ball gun for my dog

How does your dog aim it?