Search found 984 matches

by hectmarr
Fri Aug 05, 2022 7:27 am
Forum: Ammo & Parts
Topic: Great video testing spud gun failure/safety (ThebackyardScientist)
Replies: 4
Views: 1366

Re: Great video testing spud gun failure/safety (ThebackyardScientist)

Watching a piece of 3" PVC hold until 1000psi+ makes me wonder what it would take to cause my aluminum cannon to burst. I'm starting to think 3.5X combustions just might not have the energy to cause that thing to come apart. Possibly it will never be destroyed, if you do not abuse the pressure in t...
by hectmarr
Tue Aug 02, 2022 7:49 pm
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 13
Views: 1728

Re: Hybrid pumped weapon project

The "cartridges" that includes the rupture disk, seal o'ring and the pellet is as in the drawing. In case of planning a repeating or semi-automatic weapon, with an ammunition magazine, it is necessary to build many.
Cartucho balines copita.png
Cartucho balines copita.png (14.29 KiB) Viewed 540 times
by hectmarr
Tue Aug 02, 2022 5:10 pm
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 13
Views: 1728

Re: Hybrid pumped weapon project

Adapting this weapon to shoot with rupture disk. It gave me more power and regularity in the shots. I love plain old bursting records... I am using aluminized paper. I'm using two layers, which work fine for 9X of precompression that the hybrid has. The face that is made of paper itself is faced and...
by hectmarr
Sat Jul 30, 2022 9:31 am
Forum: Combustion Cannons
Topic: How do you get consistent performance out of a "cheap" cannon?
Replies: 10
Views: 773

Re: How do you get consistent performance out of a "cheap" cannon?

The "lost gas" method is what I use for my air pump guns and it works perfectly fine. Yes, it is true that it wastes a little gas but it makes everything more practical and faster to refuel. The trade-in is a practical thing for a little more butane in the process. Without hesitation, I accept the "...
by hectmarr
Fri Jul 29, 2022 12:45 pm
Forum: Combustion Cannons
Topic: Bottle Launcher "Mad Hilda XXL
Replies: 9
Views: 404

Re: Bottle Launcher "Mad Hilda XXL

https://youtu.be/3mROfmdKqAg This yasu user gets the noise with the detonation. Check out his channel on youtube because it is interesting to see his concepts and techniques for simple, semi-automatic and fully automatic noise cannons. Maybe it will come in handy for your future noise cannons or lau...
by hectmarr
Fri Jul 29, 2022 9:25 am
Forum: Combustion Cannons
Topic: Bottle Launcher "Mad Hilda XXL
Replies: 9
Views: 404

Re: Bottle Launcher "Mad Hilda XXL

I knew this, and I find it very interesting. I once tried a small "double combustion chamber" pistol that actually shot with more energy. It was a combustion weapon (not hybrid). I imagine that the space between the two cans is the second chamber and the PET bottle is the first. It obviously has mor...
by hectmarr
Thu Jul 28, 2022 12:59 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Bolt action pcp rifle with a magazine
Replies: 4
Views: 186

Re: Bolt action pcp rifle with a magazine

It looks very good, I like it.. Good work!
by hectmarr
Mon Jul 11, 2022 4:33 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Benjamin Model 30/30 CO2 Carbine Repeater "Hot Shot"
Replies: 8
Views: 3707

Re: Benjamin Model 30/30 CO2 Carbine Repeater "Hot Shot"

I have always considered that around here we are designers of homemade weapons and not inventors. Any old idea can be adapted, perfected and everything is functional to our design. Probably the old idea used by those who marketed this weapon is even older... and anonymous author. Builders have our t...
by hectmarr
Mon Jul 11, 2022 11:06 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Benjamin Model 30/30 CO2 Carbine Repeater "Hot Shot"
Replies: 8
Views: 3707

Re: Benjamin Model 30/30 CO2 Carbine Repeater "Hot Shot"

The system of this rifle is very creative. I like the idea because it comes out of the conceptual "box" and is repeated all the time. There is always a different way to do the same with its pros and cons for sure. Nice acquisition! :) Adapting it to pcp would improve it substantially, and it will in...
by hectmarr
Sun Jul 10, 2022 9:17 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Palmer Cap-Chur "Red's Special" Tranquilizer Dart Gun
Replies: 19
Views: 8737

Re: Palmer Cap-Chur "Red's Special" Tranquilizer Dart Gun

Nice acquisition. Are you going to restore it?
by hectmarr
Thu Jun 16, 2022 10:34 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 13
Views: 1728

Re: Hybrid pumped weapon project

It is a very simple and not exact way to retain mixture at low pressure, enough to fire later.
by hectmarr
Thu Jun 16, 2022 9:40 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 13
Views: 1728

Re: Hybrid pumped weapon project

Speaking of this weapon, this is version "2". The number "1", it is valveless... it does not have any valve. I am trying to seal the chamber directly with the pellet in the barrel. The pellet is "prepared", it has a bit of spelling corrector to increase the seal, (it's perfect), and increase the fri...
by hectmarr
Thu Jun 16, 2022 9:33 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 13
Views: 1728

Re: Hybrid pumped weapon project

Not in this case because the gun is a bit heavy about 3.4kg... I used 3mm tri-ply wood with a layer of thin fiberglass on the inner side, and screwed to the metal. In other models yes, I have used hard balsa because the weapon is very light.