Search found 94 matches

by keks2033
Sun Feb 24, 2019 4:06 pm
Forum: Pneumatic Cannons
Topic: preloaded pneumatic cartridge
Replies: 338
Views: 205222

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...
by keks2033
Sun Feb 24, 2019 1:40 pm
Forum: Pneumatic Cannons
Topic: preloaded pneumatic cartridge
Replies: 338
Views: 205222

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...
by keks2033
Sun Feb 24, 2019 1:31 pm
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 5460

Re: Want to build my first hybrid

Vadim wrote:Well, you probably right. Thank you for advice!
Я могу помочь.Я уже делал гибриды,даже не один,увлекался этим. Напиши https://vk.com/id111087416
by keks2033
Fri Feb 08, 2019 12:51 pm
Forum: Hybrid Cannons
Topic: hectmarr's Semi-Auto Hybrid - Theory of Operation
Replies: 19
Views: 8958

Re: hectmarr's Semi-Auto Hybrid - Theory of Operation

I agree that using the projectile as a "burst disk" in a detent would probably be the simplest way to implement this. Any energy spent moving the piston is energy that is lost. The critical part would be ensuring that the projectile is more or less airtight so that no gas can flow around it. Here i...
by keks2033
Fri Jan 25, 2019 2:06 pm
Forum: Pneumatic Cannons
Topic: Help finding a valve for my airgun
Replies: 8
Views: 3961

Re: Help finding a valve for my airgun

Hello I want to make a airgun that uses a solenoid valve. I have looked for an hour but I can't find a valve that will fit my needs. I need a valve that can withstand 300 bar, open quickly, and run off of 12 volts. Thanks for helping me out I am a huge noob when it comes to this stuff but I really ...
by keks2033
Thu Dec 20, 2018 2:43 pm
Forum: Pneumatic Cannons
Topic: Balanced Hammer Valves
Replies: 19
Views: 17908

Re: Balanced Hammer Valves

I tried to make a balanced valve and I did it. The flow area in the valve is now 8.5 mm, piston diameter 7 mm. Such a valve opens with a light drummer and soft spring, tested at a pressure of 70 atm. The lead ball after the shot went into the board by 30 mm, the air in the tee is enough for 2 shots.
by keks2033
Mon Dec 10, 2018 12:08 pm
Forum: Combustion Cannons
Topic: Self Contained Hydrogen Repeater
Replies: 30
Views: 16157

Re: Self Contained Hydrogen Repeater

At what pressure does the hho compress the combustion chamber? Or shoot at atmospheric pressure? I ask because I can not understand anything in the video. In the future I will try to learn the Russian language, apart from English, (and my own better one). :shock: It would be good to see the physical...
by keks2033
Sun Dec 09, 2018 2:17 pm
Forum: Combustion Cannons
Topic: Self Contained Hydrogen Repeater
Replies: 30
Views: 16157

Re: Self Contained Hydrogen Repeater

I also did the hydrogen gun. The sound of the shot is very sharp and strong, but the bullet flies slowly. Perhaps this is because the tank is small.
[youtube][/youtube]
by keks2033
Tue Nov 20, 2018 10:20 am
Forum: Pneumatic Cannons
Topic: PNEUMATIC GUN WITH VALVE QEV
Replies: 5
Views: 5374

Re: PNEUMATIC GUN WITH VALVE QEV

wow, this is a gun!The first time I see this!
by keks2033
Mon Nov 19, 2018 2:50 am
Forum: Pneumatic Cannons
Topic: PNEUMATIC GUN WITH VALVE QEV
Replies: 5
Views: 5374

PNEUMATIC GUN WITH VALVE QEV

Made a gun of 40 mm caliber, used a piston valve. The gun works well at pressures up to 20 atm, no longer possible, because the rubber on the piston is torn.
[youtube][/youtube]
here is an approximate diagram of the valve. Used a coarse water filter.
by keks2033
Fri Nov 16, 2018 2:41 pm
Forum: Pneumatic Cannons
Topic: pneumatic spearguns...
Replies: 19
Views: 11858

Re: pneumatic spearguns...

I plan to make just such a pneumatics. There won't be much of a rock, 20-40 atm, depending on the diameter of the pump rod. Perhaps the pump handle will play the role of fits. I know that this is not the most effective scheme, but it must be done.
by keks2033
Thu Nov 15, 2018 1:43 pm
Forum: Pneumatic Cannons
Topic: Mechnanically locked spool valve
Replies: 4
Views: 2226

Re: Mechnanically locked spool valve

warm, only -5, snow. I understand that the flow section should be more, but this requires large parts, they are expensive, but I can not afford to spend a lot of money on a hobby. And further. Was everything okay with the site? From 07 to 15 November, I could not create a topic, could not answer, ga...
by keks2033
Thu Nov 15, 2018 12:20 pm
Forum: Pneumatic Cannons
Topic: Mechnanically locked spool valve
Replies: 4
Views: 2226

Re: Mechnanically locked spool valve

I thank for the scheme, I just experiment with a large caliber. I make a valve with a large flow area
Image
[youtube][/youtube]
by keks2033
Tue Nov 06, 2018 12:09 pm
Forum: Off-Topic Hobbies
Topic: Help name the valve
Replies: 6
Views: 6022

Re: Help name the valve

Please give links to sites similar to this one. It is necessary that it would be discussed precisely homemade pneumatic gun, very interesting. I could find it myself, but because of the language barrier I always get to the sites with industrial pneumatics, it’s not interesting, I can read it too. I ...
by keks2033
Tue Nov 06, 2018 12:01 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2461
Views: 1586075

Re: "In the world of spuds today"

Theory and development is listed in this thread with plenty of other designs and configurations discussed.[/quote] In minute 0, 34 of the video the ammunition hitting the target sound better than my drummer! :shock: jajajajaja :bounce:[/quote] [youtube]https://youtu.be/IBdYoMJ4SoA[/youtube] I also d...