Search found 989 matches

by hectmarr
Thu Aug 11, 2022 11:09 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 17
Views: 1996

Re: Hybrid pumped weapon project

I did a test at 11X with a 16g .22 pellet and three disks, as Jack suggested. He drilled into an old 1mm stainless steel military pan and the noise is quite loud. The pellet seems to have penetrated through, but it was useless to find traces...The damage is in the first photo. Orificio acero inox. 1...
by hectmarr
Wed Aug 10, 2022 10:47 am
Forum: Combustion Cannons
Topic: How do you get consistent performance out of a "cheap" cannon?
Replies: 13
Views: 927

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

CHEAP, UGLY AND FUNCTIONAL! :) There is a caveat in that "pretty is as pretty does", so when something is functional, there is a certain beauty in it regardless of its aesthetic attributes. If you're right. There is an aesthetic of the function, which is independent of the aesthetic itself, (easier...
by hectmarr
Wed Aug 10, 2022 10:16 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 17
Views: 1996

Re: Hybrid pumped weapon project

Oh yeah !! it's the same... Keep in mind that your post you name here is my bible on this. I not only remember it, I have it complete in a word, on my pc and on a DVD... It is exactly the same as what you made, I only made it in the form of a weapon to be able to shoot and aim, with the air pump inc...
by hectmarr
Wed Aug 10, 2022 9:07 am
Forum: Combustion Cannons
Topic: How do you get consistent performance out of a "cheap" cannon?
Replies: 13
Views: 927

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

I share this point of view, CHEAP, UGLY AND FUNCTIONAL! :)
by hectmarr
Wed Aug 10, 2022 9:05 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 17
Views: 1996

Re: Hybrid pumped weapon project

I can pierce 0,7 mm sheet steel That's quite impressive for lead pellets to be honest. Have you tried with more than two layers of foil? No, I'm just using the gun with two rupture discs. Surely you can break three, with a little more precompression load, I estimate with 10 - 11X. At present it is ...
by hectmarr
Fri Aug 05, 2022 7:27 am
Forum: Ammo & Parts
Topic: Great video testing spud gun failure/safety (ThebackyardScientist)
Replies: 4
Views: 1517

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: 17
Views: 1996

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 724 times
by hectmarr
Tue Aug 02, 2022 5:10 pm
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 17
Views: 1996

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: 13
Views: 927

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: 432

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: 432

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: 223

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: 4522

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...