Search found 148 matches
- Sun Dec 20, 2020 8:46 pm
- Forum: Pneumatic Cannons
- Topic: My first working pengun- ammo questions...
- Replies: 15
- Views: 1289
Re: My first working pengun- ammo questions...
looks fun... I really need to make one too
- Sat Aug 29, 2020 9:40 am
- Forum: Pneumatic Cannons
- Topic: Valve jam with liquid gas
- Replies: 13
- Views: 1062
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
When we switched from acetylene to propane at work we had some torch heads and regulators get fussy
- Fri Aug 21, 2020 6:45 pm
- Forum: Pneumatic Cannons
- Topic: Exhaust value with decent trigger feel
- Replies: 3
- Views: 815
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)
Trigger feel as you design the trigger-sear geometry
Also saves on a blow gun ( I am extremely cheap)
- Wed Jul 01, 2020 8:12 pm
- Forum: Ammo & Parts
- Topic: Brass as the foundation of a projectile?
- Replies: 6
- Views: 1426
Re: Brass as the foundation of a projectile?
I have wanted to do this for many years... thought 12 g hulls would be fun
- Fri Jun 12, 2020 5:03 am
- Forum: Pneumatic Cannons
- Topic: Browning Airstar 200
- Replies: 4
- Views: 1111
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...
- Thu May 07, 2020 8:17 am
- Forum: Pneumatic Cannons
- Topic: is my valve good?
- Replies: 3
- Views: 817
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...
- Sat May 02, 2020 7:17 am
- Forum: General How-To & Discussion
- Topic: Canada prohibits spudguns over 20mm
- Replies: 11
- Views: 2753
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...
- Fri May 01, 2020 7:39 pm
- Forum: General How-To & Discussion
- Topic: Canada prohibits spudguns over 20mm
- Replies: 11
- Views: 2753
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...
- Sun Apr 19, 2020 3:16 pm
- Forum: General How-To & Discussion
- Topic: Question regarding spigot mortar style ammo.
- Replies: 7
- Views: 1661
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....
- Wed Apr 15, 2020 6:28 pm
- Forum: General How-To & Discussion
- Topic: Question regarding spigot mortar style ammo.
- Replies: 7
- Views: 1661
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.
- Tue Feb 25, 2020 7:34 am
- Forum: General How-To & Discussion
- Topic: Nerf Launcher Valve/Design Question
- Replies: 2
- Views: 1396
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
- Fri Feb 14, 2020 12:44 pm
- Forum: Ammo & Parts
- Topic: Low-friction/Specialty Ball Valves?
- Replies: 11
- Views: 3702
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...
- Tue Jan 21, 2020 12:42 pm
- Forum: Pneumatic Cannons
- Topic: compact precision launcher
- Replies: 3
- Views: 2192
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 ...
- Tue Jan 21, 2020 12:21 pm
- Forum: Ammo & Parts
- Topic: Quest for paintball alternatives
- Replies: 2
- Views: 2096
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+- ...
- Fri Jan 17, 2020 6:41 pm
- Forum: Pneumatic Cannons
- Topic: compact precision launcher
- Replies: 3
- Views: 2192
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.
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.