Search found 815 matches

by hectmarr
Mon Oct 26, 2020 9:37 am
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 59
Views: 10591

Re: JSR's workshop chronicles

Excellent! I see in the future well finished weapons and a lot of fun for you, and for me. :)
by hectmarr
Wed Oct 21, 2020 10:34 am
Forum: General How-To & Discussion
Topic: Fly-K mortar - "captive piston" variation
Replies: 10
Views: 5514

Re: Fly-K mortar - "captive piston" variation

Air at atmospheric pressure within the barrel and projectile appears to act like an elastic. The gases of the combustion chamber compress this air and only then the ammunition survives, and the shot is observed smoother. The air inside the projectile where the force of the compressed air is exerted ...
by hectmarr
Tue Oct 20, 2020 12:20 pm
Forum: General How-To & Discussion
Topic: Fly-K mortar - "captive piston" variation
Replies: 10
Views: 5514

Re: Fly-K mortar - "captive piston" variation

This is. I know it is not the same because the weapon has a firing barrel, but it has something to do with it, I think.
by hectmarr
Tue Oct 20, 2020 11:42 am
Forum: General How-To & Discussion
Topic: Fly-K mortar - "captive piston" variation
Replies: 10
Views: 5514

Re: Fly-K mortar - "captive piston" variation

I like the system, I did not know it. I have a kind of "grenade launcher" that works with a rupture disc, but it is not exactly like the drawing. The projectile is simply housed in the firing barrel. It is an ancient weapon that I built, that I adapted for this purpose. The "cartridge" that houses t...
by hectmarr
Sun Oct 18, 2020 8:59 am
Forum: Hybrid Cannons
Topic: Autonomous pistol .22
Replies: 13
Views: 1152

Re: Autonomous pistol .22

What I should do is build a piston valve like the one you drew and compare with the other, to see directly how they behave. I have compared it to the rupture disc system that I have, that which I built at the beginning, with aluminum foil discs, and I am working on that. I haven't noticed much of a ...
by hectmarr
Sat Oct 17, 2020 8:32 pm
Forum: Hybrid Cannons
Topic: Autonomous pistol .22
Replies: 13
Views: 1152

Re: Autonomous pistol .22

I made a more detailed drawing of this type of trigger valve that I am testing. In fact, it is necessary to contain the kinetic energy of the ball, when it has left the main retention that blocks the combustion chamber. The problem that appears is that the ball tends to bounce and obstruct the gas o...
by hectmarr
Fri Oct 16, 2020 8:15 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: stonebow
Replies: 4
Views: 364

Re: stonebow

Nice work, congratulations! I love crossbows, maybe I'll ever try to build one. It is interesting what you comment on the precision of the balls in the absence of a firing cannon, and the magnus effect.
by hectmarr
Sat Oct 10, 2020 7:35 pm
Forum: Hybrid Cannons
Topic: Autonomous pistol .22
Replies: 13
Views: 1152

Re: Autonomous pistol .22

In the drawing of the valve the screw that compresses the o'ring is not drawn. It is a simple valve but it has a very tight regulation. The best thing is that it can be very small. With the piston and spring systems that I also use in long guns, it is impossible to build small, which is important fo...
by hectmarr
Wed Oct 07, 2020 7:22 pm
Forum: Hybrid Cannons
Topic: Autonomous pistol .22
Replies: 13
Views: 1152

Re: Autonomous pistol .22

Hi Jack! Thanks for your comment. :) Answering your question about the opening pressure of the captive ball valve, I do not have to measure the pressure, but the effects of that pressure. I comment the following. When I test this weapon, (and all the others), I always block the outlet completely, an...
by hectmarr
Mon Sep 14, 2020 3:05 pm
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1567

Re: pages won't open

PCGUY wrote:
Mon Sep 14, 2020 2:36 pm
Alright guys, at a new host - still sorting a few small things out for transitioning server/settings/etc but our white pages seemed to have immediately disappeared!
Everything ok, I can already see everything. Thank you very much. :)
by hectmarr
Fri Sep 11, 2020 7:33 pm
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1567

Re: pages won't open

Follow the problem in my case. On some pages, like "The short question", I get a white screen, and only that. :(
by hectmarr
Mon Sep 07, 2020 3:02 pm
Forum: Hybrid Cannons
Topic: Autonomous pistol .22
Replies: 13
Views: 1152

Re: Autonomous pistol .22

I got a good price for a silencer that is just right for the barrel thread. The gun was literally silent! 8-) , in good time.
pistola híbrida autónoma 1
pistola híbrida autónoma 1
by hectmarr
Tue Sep 01, 2020 8:07 pm
Forum: Pneumatic Cannons
Topic: Valve jam with liquid gas
Replies: 13
Views: 641

Re: Valve jam with liquid gas

Study the possibility of using a lubricant that enters the gas spray, similar to lubrication systems for compressed air, which is used in compressors. On the other hand, the solenoid valves that I have have a maximum and minimum operating temperature, and are for gases, and not for liquids.
by hectmarr
Sat Aug 29, 2020 7:45 pm
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1567

Re: pages won't open

Is the same for me
by hectmarr
Wed Aug 26, 2020 8:42 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1488
Views: 114563

Re: Short question topic

Since you make all the same way, try a barrel from a consistent shooter that you have, so on so forth the process of elimination... I'm going to change the barrel. For some reason, I suspect that the bb`s acquires an energetic rotation movement and that produces the deviation, due to the magnus eff...