Search found 51 matches
- Mon Aug 05, 2024 4:14 pm
- Forum: Pneumatic Cannons
- Topic: Rapid firing air cannon?
- Replies: 20
- Views: 89530
Re: Rapid firing air cannon?
I am wondering how people build air cannons that seemingly have no air refilling time. Here's a couple videos showing some of them. https://www.youtube.com/watch?v=75osjenPLWw https://www.youtube.com/watch?v=3PJIiQ3tkIc I don't see any air compressor anywhere, not even a large noticeable air tank l...
- Sun Mar 10, 2024 2:03 pm
- Forum: Pneumatic Cannons
- Topic: What valve type to use for medium-pressure (12-30 bar) long barrel system?
- Replies: 7
- Views: 39414
Re: What valve type to use for medium-pressure (12-30 bar) long barrel system?
Are QEVs available also to 30 bar?
- Sun Mar 10, 2024 1:01 pm
- Forum: Pneumatic Cannons
- Topic: What valve type to use for medium-pressure (12-30 bar) long barrel system?
- Replies: 7
- Views: 39414
Re: What valve type to use for medium-pressure (12-30 bar) long barrel system?
It might be - but the labor associated with making a custom piston valve isn't worth it. I'll have enough work with the whole metal gun. And solenoid valve is able to push a lightweight projectile at reasonable speeds from 2L air reservoir even in this setup (around 70 m/s2 which for this tank gun e...
- Sat Feb 24, 2024 10:48 am
- Forum: Pneumatic Cannons
- Topic: What valve type to use for medium-pressure (12-30 bar) long barrel system?
- Replies: 7
- Views: 39414
Re: What valve type to use for medium-pressure (12-30 bar) long barrel system?
It is unusual to answer your own topic - top-quality solenoid valves are the only reasonable options. It depends on the length of a barrel whether two smaller but faster valves or one bigger and slower valve are alright.
- Thu Feb 15, 2024 8:21 am
- Forum: Pneumatic Cannons
- Topic: What valve type to use for medium-pressure (12-30 bar) long barrel system?
- Replies: 7
- Views: 39414
What valve type to use for medium-pressure (12-30 bar) long barrel system?
Hey all, I'm gonna need to build a system with 75 mm caliber barrel of 3.5 m length. The installation space in a tank turret will be very limited, thus I cannot go with a huge and low pressure chamber. All will be steel-made. The expansion chamber is expected to be around 3-4 litres and hold up to 3...
- Thu Apr 06, 2023 1:56 am
- Forum: Pneumatic Cannons
- Topic: Complex yet small regulator with multiple preset options possible?
- Replies: 3
- Views: 13522
Re: Complex yet small regulator with multiple preset options possible?
Good advise! I didn't know such things exist. So far I had an idea with two to three regulators set to different pressures and regular safety valves behind them.
- Fri Mar 24, 2023 2:16 pm
- Forum: Pneumatic Cannons
- Topic: Complex yet small regulator with multiple preset options possible?
- Replies: 3
- Views: 13522
Complex yet small regulator with multiple preset options possible?
Hey guys. I'm using a heavy paintball AT gun powered by HPA ranging from 9-14 bar (depending on the shooting distance). It does currently have a standard regulator with two gauges on the scuba bottle. But anytime shooting distance suddenly changes (which happens often), I need to adjust the pressure...
- Tue Aug 20, 2019 2:52 am
- Forum: General How-To & Discussion
- Topic: GGDT/HGDT Request Thread
- Replies: 120
- Views: 270189
Re: GGDT/HGDT Request Thread
You are my hero, Jack! Thank you
- Mon Aug 19, 2019 11:06 am
- Forum: General How-To & Discussion
- Topic: GGDT/HGDT Request Thread
- Replies: 120
- Views: 270189
Re: GGDT/HGDT Request Thread
Does anyone have a GGDT installler/exe file? I lost it on the old PC and now I would like to make some compressed-air mortar calculations. This tool was so handy!
- Wed May 09, 2018 8:52 am
- Forum: General How-To & Discussion
- Topic: GGDT/HGDT Request Thread
- Replies: 120
- Views: 270189
Re: GGDT/HGDT Request Thread
Hi guys, I finally tried GGDT and it is really useful tool. If nothing else I was able to calculate the drag coefficient of my shots based on that :) Is there a way to calculate the velocity at a distance? Like I would like to calculate a velocity drop after 50 meters, can I do that inside the tool?...
- Mon Feb 05, 2018 5:34 pm
- Forum: Pneumatic Cannons
- Topic: Simulated recoil on heavy cannons
- Replies: 18
- Views: 14501
Re: Simulated recoil on heavy cannons
The performance itself may not be that big of a trouble, but as you mentioned before the effect has to be at least somewhat believable. Regarding your concerns: - the system is under pressure for a brief moment only (and it is not exactly air tight in the breech area either). That's why I wanted the...
- Mon Feb 05, 2018 4:56 pm
- Forum: Pneumatic Cannons
- Topic: Simulated recoil on heavy cannons
- Replies: 18
- Views: 14501
Re: Simulated recoil on heavy cannons
Ok, here is how the setup looks like.
- Mon Feb 05, 2018 4:03 pm
- Forum: Pneumatic Cannons
- Topic: Simulated recoil on heavy cannons
- Replies: 18
- Views: 14501
Re: Simulated recoil on heavy cannons
Just to make sure I got it correctly, Ragnarok: by tapping gas off the barrel you mean to put something like a T-piece in the hose that currently leads the air into the barrel and connect in to the cylinder? Or something more elaborate? The air discharge is very quick but the cylinder needs the pres...
- Mon Feb 05, 2018 2:14 pm
- Forum: Pneumatic Cannons
- Topic: Simulated recoil on heavy cannons
- Replies: 18
- Views: 14501
Re: Simulated recoil on heavy cannons
Here is my simple drawing. What I have in mind is a modified pneumatic cylinder with an exhaust. Upon opening the valve the cylinder pushes the barrel-breech assembly backwards for a moment. Then the piston reaches the exhaust and the air rushes to the barrel to make the shot. Piston then travels fu...
- Mon Feb 05, 2018 4:33 am
- Forum: Pneumatic Cannons
- Topic: Simulated recoil on heavy cannons
- Replies: 18
- Views: 14501
Re: Simulated recoil on heavy cannons
Thanks guys! The launcher is so heavy and made of steel only for realistic look and feel. And I'm afraid I can't make the shot heavier even in the form of extra dispensable flour. These parameters are constants limiting the amount of remaining options. That being said, Ragnarok is right about the mi...