Search found 93 matches

by keks2033
Sat May 23, 2020 11:53 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Valve thing
Replies: 4
Views: 166

Re: Valve thing

Image
by keks2033
Sat May 16, 2020 2:12 pm
Forum: Pneumatic Cannons
Topic: PNEUMATIC GUN WITH VALVE QEV
Replies: 5
Views: 1054

Re: PNEUMATIC GUN WITH VALVE QEV

A few days ago, I managed to make and test a piston valve with a caliber of 40 mm. I managed to make an exit into the barrel with a diameter of 14 mm. I pumped 50 atm into a cannon with a homemade pump.
by keks2033
Sat May 16, 2020 1:42 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: QEV blowback mod?
Replies: 7
Views: 395

Re: QEV blowback mod?

Hey guy's me again Ive tried a few design's and idea's for my homemade blowback uzi but they didn't work so well. So I decided to use a qev this one to be exact https://encrypted-tbn3.gstatic.com/shopping?q=tbn:ANd9GcTTE4lUtjnpS6IxJ-J2xkwNrblpyn5sxob2zCMU76pP5viKfH12k9dFP-8DaiUv9yUXF9k6qWeN4SI&usqp...
by keks2033
Mon Sep 09, 2019 12:50 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: qev and pop off problem
Replies: 12
Views: 3130

Re: qev and pop off problem

[youtube][/youtube]
[youtube][/youtube]
I did it once. Maybe it will help you.
by keks2033
Mon Sep 09, 2019 12:42 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: qev and pop off problem
Replies: 12
Views: 3130

Re: qev and pop off problem

there is too much extra volume in the gun. Pop of the valve does not have time to lower everything, so that the piston valve would work. Try to fill the whole empty space with cold welding or epoxy glue. For air, make a channel 3-4 mm in diameter, this is enough.
by keks2033
Mon Sep 02, 2019 2:41 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: qev and pop off problem
Replies: 12
Views: 3130

Re: qev and pop off problem

Air goes too fast through the gun to pump the wheels. Due to the large flow of pop-off, the valve cannot close. After the gun and in front of the pop-off valve, put a partition with a very small hole, with a diameter of 1-0.5 mm, not more, this will help.
by keks2033
Fri Jul 19, 2019 1:19 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Fionda Mod. 63 Semi-Auto CO2 BB gun made in Brazil
Replies: 3
Views: 1646

Re: Fionda Mod. 63 Semi-Auto CO2 BB gun made in Brazil

[youtube][/youtube]
I have a video with shooting from this rifle.
by keks2033
Sun May 19, 2019 11:54 am
Forum: Pneumatic Cannons
Topic: Powerful homemade pneumatic gun
Replies: 10
Views: 1902

Re: Powerful homemade pneumatic gun

My friend made another gun. It is made of a fire extinguisher, the valve is balanced. He made her keak toy for his younger brother.
by keks2033
Sun Apr 28, 2019 12:58 pm
Forum: Pneumatic Cannons
Topic: .68 call pistol bike pump powered
Replies: 3
Views: 1191

Re: .68 call pistol bike pump powered

Try to connect instead of the pump cylinder with Greengas. This can be done even with cold welding and electrical tape.
by keks2033
Sat Apr 27, 2019 9:04 am
Forum: Pneumatic Cannons
Topic: Powerful homemade pneumatic gun
Replies: 10
Views: 1902

Re: Powerful homemade pneumatic gun

But what I did. A pistol with a balanced valve as in the picture. I pumped up and 100 atm, but the best bullet speed starts from 70 to 50 atm, from 160m / s to 130 m / s. The number of shots is 30.
[youtube][/youtube]
by keks2033
Sat Apr 27, 2019 7:57 am
Forum: Pneumatic Cannons
Topic: Powerful homemade pneumatic gun
Replies: 10
Views: 1902

Re: Powerful homemade pneumatic gun

[youtube][/youtube] And what can you say about such a gun?)) The pressure is 120 atm, the barrel is smooth, the accuracy is 20 cm by 20 meters. A balanced valve is used.
by keks2033
Sat Apr 27, 2019 6:19 am
Forum: Pneumatic Cannons
Topic: Powerful homemade pneumatic gun
Replies: 10
Views: 1902

Re: Powerful homemade pneumatic gun

Strange, it is impossible to attach a video, only the link.
by keks2033
Sat Apr 27, 2019 6:16 am
Forum: Pneumatic Cannons
Topic: Powerful homemade pneumatic gun
Replies: 10
Views: 1902

Powerful homemade pneumatic gun

My friend has long been interested in medium and high pressure pneumatics. Just like me, she does it with the help of plumbing and simple tools. For example, here is one of his guns. This is a coaxial circuit, caliber 20 millimeters, pressure 40 atm. Homemade fully in the style of this site. https:/...
by keks2033
Mon Mar 04, 2019 1:20 pm
Forum: General How-To & Discussion
Topic: Caselman air machinegun
Replies: 101
Views: 23003

Re: Caselman air machinegun

Jack, this scheme will not be more effective? The piston in the bypass is smaller than the volume in the drummer.
by keks2033
Sun Feb 24, 2019 4:06 pm
Forum: Pneumatic Cannons
Topic: preloaded pneumatic cartridge
Replies: 331
Views: 53618

Re: preloaded pneumatic cartridge

Interesting, my only concern is that since the o-rings have a large diameter, even though they are balanced there will be considerable friction at higher pressures so a larger force will be needed to actuate the cartridge. Yes, it is probably as you say. I thought about using it at about 15 bar whi...