Search found 147 matches

by Anatine Duo
Sat Aug 29, 2020 9:40 am
Forum: Pneumatic Cannons
Topic: Valve jam with liquid gas
Replies: 13
Views: 255

Re: Valve jam with liquid gas

propane doesn't behave with some rubbers; might be swelling the o-rings

When we switched from acetylene to propane at work we had some torch heads and regulators get fussy
by Anatine Duo
Fri Aug 21, 2020 6:45 pm
Forum: Pneumatic Cannons
Topic: Exhaust value with decent trigger feel
Replies: 1
Views: 248

Re: Exhaust value with decent trigger feel

lift off valve, sear release:)

Trigger feel as you design the trigger-sear geometry

Also saves on a blow gun ( I am extremely cheap)
by Anatine Duo
Wed Jul 01, 2020 8:12 pm
Forum: Ammo & Parts
Topic: Brass as the foundation of a projectile?
Replies: 6
Views: 852

Re: Brass as the foundation of a projectile?

I have wanted to do this for many years... thought 12 g hulls would be fun
by Anatine Duo
Fri Jun 12, 2020 5:03 am
Forum: Pneumatic Cannons
Topic: Browning Airstar 200
Replies: 4
Views: 630

Re: Browning Airstar 200

I love it, and the breech is interesting too. I have often wondered why the electric airsoft guns didn't use a sear. It would give the trigger a more realistic feel, completing the firing cycle rather than starting it, and would allow better reduction through the gears so a weaker motor could be use...
by Anatine Duo
Thu May 07, 2020 8:17 am
Forum: Pneumatic Cannons
Topic: is my valve good?
Replies: 3
Views: 537

Re: is my valve good?

I agree, that is a pretty extreme choke. I have used 1/2" valve on 20mm barrel. Valve has less than half the flow of the barrel, still good for velocities around 499 fps at bicycle pump pressures with light projectiles. If you want a significant portion of the velocity available then more flow is ne...
by Anatine Duo
Sat May 02, 2020 7:17 am
Forum: General How-To & Discussion
Topic: Canada prohibits spudguns over 20mm
Replies: 11
Views: 1404

Re: Canada prohibits spudguns over 20mm

"Also included are two new categories of firearms that exceed safe civilian use. These are characterized by the following physical attributes: a 20 mm bore or greater and the capacity to discharge a projectile with a muzzle energy greater than 10 000 joules " Since that refers to 2 new categories it...
by Anatine Duo
Fri May 01, 2020 7:39 pm
Forum: General How-To & Discussion
Topic: Canada prohibits spudguns over 20mm
Replies: 11
Views: 1404

Canada prohibits spudguns over 20mm

So it looks like my 20mmplus bores are now prohibited!!! What do I do... get them grandfathered and so non-transferable? Do I get a compensation for turning them in? All my pneumatics are firearms in Canada (over 500fps) and I think any combustion would be too (combustion = fire). Not happy with the...
by Anatine Duo
Sun Apr 19, 2020 3:16 pm
Forum: General How-To & Discussion
Topic: Question regarding spigot mortar style ammo.
Replies: 7
Views: 1105

Re: Question regarding spigot mortar style ammo.

I have been thinking about hollow spigot launchers more now... was it this thread that caused it or is it the Umarex Air Saber? For the arrow launchers do they not worry about the dead space? Maybe not since they are hunting-oriented. BTW fins don't need to be perfect especially on long projectiles....
by Anatine Duo
Wed Apr 15, 2020 6:28 pm
Forum: General How-To & Discussion
Topic: Question regarding spigot mortar style ammo.
Replies: 7
Views: 1105

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
Tue Feb 25, 2020 7:34 am
Forum: General How-To & Discussion
Topic: Nerf Launcher Valve/Design Question
Replies: 2
Views: 1168

Re: Nerf Launcher Valve/Design Question

I can't tell from the video but it could just be a linkage to a blowgun valve given the low performance, multi-shot capability, and apparent necessity to tap the trigger very briefly
by Anatine Duo
Fri Feb 14, 2020 12:44 pm
Forum: Ammo & Parts
Topic: Low-friction/Specialty Ball Valves?
Replies: 11
Views: 2954

Re: Low-friction/Specialty Ball Valves?

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...
by Anatine Duo
Tue Jan 21, 2020 12:42 pm
Forum: Pneumatic Cannons
Topic: compact precision launcher
Replies: 3
Views: 1806

Re: compact precision launcher

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 ...
by Anatine Duo
Tue Jan 21, 2020 12:21 pm
Forum: Ammo & Parts
Topic: Quest for paintball alternatives
Replies: 2
Views: 1747

Quest for paintball alternatives

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+- ...
by Anatine Duo
Fri Jan 17, 2020 6:41 pm
Forum: Pneumatic Cannons
Topic: compact precision launcher
Replies: 3
Views: 1806

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
Sat Dec 14, 2019 3:10 pm
Forum: Pneumatic Cannons
Topic: Syncing of multiple valves.
Replies: 10
Views: 2007

Re: Syncing of multiple valves.

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?