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by hectmarr
Thu Jul 28, 2022 12:59 pm
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Re: Bolt action pcp rifle with a magazine

It looks very good, I like it.. Good work!
by Bazooka
Mon Jul 25, 2022 9:04 pm
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Bottle Launcher "Mad Hilda XXL

This is my advanced Bottle Bazooka. I had an account here, but lost my email. So maybe you will remember some of the used parts. I wanted to get my Bazooka loaded clean and fast. I wanted to get the perfect fuelmix "out of the box", so I use premium lighters with high output and some one-way valves ...
by Bazooka
Fri Jul 29, 2022 2:03 am
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Re: Bottle Launcher "Mad Hilda XXL

The Boga principle. You know this water fountains, that shot clear water ? In a wide range looking like a solid "piece of water" ? They use the same tech. They "order" the stream in a line, straight, without interference. The water is traveling faster and concentrated through the air. With combustio...
by Moonbogg
Tue Aug 09, 2022 2:58 pm
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Re: Gel block calibration BB gun

I'd buy a high-end PCP airgun and swap the barrel with a smooth one for BBs and just use that. You can connect the gun to a large air tank.
by hectmarr
Tue Aug 02, 2022 5:10 pm
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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
Tue Aug 02, 2022 7:49 pm
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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
by hectmarr
Sat Jul 30, 2022 9:31 am
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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 Bazooka
Sat Jul 30, 2022 8:29 am
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Re: How do you get consistent performance out of a "cheap" cannon?

Easyest Nerf Cannon with direct fueling and firing I ever made. It was a 30min Project. This morning. The chamber is waaayyy tooo big. So U see what happens with normal Nerf Darts... But this is only to show the direct fueling by a Torch WITH use of a bigger Lighter or Torch. 4 seconds load and booo...
by Dembouz921
Fri Jul 29, 2022 1:14 pm
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Re: Bolt action pcp rifle with a magazine

Thanks yall ,to lncrease power I can either increase the volume between the preset and the valve or increase the pressure (for instance 9mm pcp rifle that shoots 200joules uses ~20ml at ~120 bars, mine is ~5ml at 60 bars), but both increase will lead to lower shot count and higher firing pressure. I...
by hectmarr
Fri Jul 29, 2022 12:45 pm
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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
Wed Aug 10, 2022 9:05 am
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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
Wed Aug 10, 2022 10:47 am
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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 mmk8283
Wed Aug 10, 2022 1:40 pm
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Re: A look inside the "bleacher reacher" t-shirt launcher

Thanks for the clarification, I guess I've never seen an o-ring used in that way. I think I have the concept pretty well figured out here...

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