Search found 968 matches

by hectmarr
Mon May 09, 2022 9:23 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Semi-automatic airsoft gun, very simple
Replies: 4
Views: 1420

Re: Semi-automatic airsoft gun, very simple

It was more or less like that, like in the drawing.
carga bb`s.png
by hectmarr
Sat May 07, 2022 10:45 am
Forum: Hybrid Cannons
Topic: Armadas 1500 II (hybrid pump rifle)
Replies: 3
Views: 179

Re: Armadas 1500 II (hybrid pump rifle)

Thank you so much guys! :)
by hectmarr
Sat Apr 30, 2022 6:19 pm
Forum: Hybrid Cannons
Topic: Armadas 1500 II (hybrid pump rifle)
Replies: 3
Views: 179

Armadas 1500 II (hybrid pump rifle)

This is a project called "Armadas 1500 II". It is a weapon that works with an integrated air pump, it is a single shot, hybrid that precompresses at 8X - 10X. The firing barrel is with 12 microgrooves, caliber .25 and fires common pellets. The inverted bolt is made of 1045 steel, the combustion cham...
by hectmarr
Sat Apr 30, 2022 9:38 am
Forum: Hybrid Cannons
Topic: Small semi automatic hybrid project
Replies: 126
Views: 39120

Re: Small semi automatic hybrid project

I thought it doesn't last much use, but it works very well, up to 10 bar. I'm about to buy the 5-way, two-position one to shrink everything a bit.
by hectmarr
Thu Apr 28, 2022 4:22 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Convert a Gas refill cylinder to an air cylinder?
Replies: 7
Views: 304

Re: Convert a Gas refill cylinder to an air cylinder?

You can adapt this way. If you use only one one-way valve for charging and exhaust, one end of the long inner tube must be perfectly capped and secured. You can assemble everything outside, and then seal the inner tube with epoxy. In my opinion, if you secure the valve well with a pin, it is safer t...
by hectmarr
Thu Apr 28, 2022 12:26 pm
Forum: Hybrid Cannons
Topic: Small semi automatic hybrid project
Replies: 126
Views: 39120

Re: Small semi automatic hybrid project

Sistema carga de munición accionado por gases, diagrama, (1).gif The problem with the automatic loading of balls is that the spring of the tube that houses the ammunition does not survive more than two or three shots because when it opens, the pressure of the explosion expels the bb`s towards the s...
by hectmarr
Thu Apr 28, 2022 11:22 am
Forum: Hybrid Cannons
Topic: Small semi automatic hybrid project
Replies: 126
Views: 39120

Re: Small semi automatic hybrid project

Updating of this project, in this case, the LB VI, (lansa bolillas 6). :) LB VI.JPG This prototype is the one that I recently built, which has several important simplifications with respect to the previous one, the first one. Shoots 5X, .25 caliber steel bbs. The loading in the chamber of the ammuni...
by hectmarr
Sun Apr 17, 2022 8:10 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Semi-Automatic Airsoft Pistol
Replies: 7
Views: 1273

Re: Semi-Automatic Airsoft Pistol

it looks very cute. Nice job!
by hectmarr
Wed Nov 17, 2021 5:23 pm
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3351

Re: Designing a inline piston pressure regulator - Fluid statics math model

This regulator was designed to be manufactured with inexpensive precast bronze parts, available anywhere. Does not use lathe machining for metal. The two grooves for the two o'rings are made on the domestic bench drilling machine and a small file. It can be put together in a couple of hours ... What...
by hectmarr
Mon Nov 15, 2021 4:14 pm
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3351

Re: Designing a inline piston pressure regulator - Fluid statics math model

It is not so difficult to make the air passage channel. I drilled a hole in the body of the regulator "A" and then made a slot with the Dremel, as the drawing shows, but without breaking the inside of the body, where the piston moves. In this way, there is a conduit through which air can pass betwee...
by hectmarr
Sun Nov 14, 2021 10:17 am
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3351

Re: Designing a inline piston pressure regulator - Fluid statics math model

Actually the one I show in the photo has only two o'ring, which are 2 mm thick. The inlet hole is very small, 0.75 mm and is polished on the inside, which added to the lubrication, a little silicone, which does not come off, does the job. It works as a shut-off valve for the "HPA" bottle, which I us...
by hectmarr
Sat Nov 13, 2021 10:16 am
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3351

Re: Designing a inline piston pressure regulator - Fluid statics math model

This little pressure regulator, I made it. As the areas on the two faces of the piston, (6.3 mm) are equal, the high pressure compressed air, (arrow in dark blue), that enters produces the same force in both directions, and the piston is balanced, without any math. The displacement of the piston is ...
by hectmarr
Wed Aug 25, 2021 9:57 am
Forum: Hybrid Cannons
Topic: Hybrid Piston Pilot Air Ratio
Replies: 18
Views: 5422

Re: Hybrid Piston Pilot Air Ratio

jackssmirkingrevenge wrote:
Tue Aug 24, 2021 10:45 am
hectmarr wrote:
Thu Aug 19, 2021 6:47 pm
It is not a very neat job, but it works fast and it pays quite little, it is what it is.
Almost like a T-34 tank :)

It's good that you have this resource to better flesh out your ideas!
Oh yeah! Like the Russian T 34, exactly that! 8-)
by hectmarr
Thu Aug 19, 2021 6:47 pm
Forum: Hybrid Cannons
Topic: Hybrid Piston Pilot Air Ratio
Replies: 18
Views: 5422

Re: Hybrid Piston Pilot Air Ratio

I had the valve and the entire bolt system of the weapon that I am planning built by a turner. I actually drew everything in detail, and measurements, exact, and I passed it to him.
It is not a very neat job, but it works fast and it pays quite little, it is what it is.