Honestly, it's a fair criticism. There probably won't be a visible performance increase with this configuration compared to a single valve and one chamber equivalent to the volume of the three chambers, unless the projectile is extremely light vis a vis its cross-section or the barrel has a much la...

[youtube]https://youtu.be/QT5aCabvHx0[/youtube] Figured I should post the final result. I ended up using 1/4 od tubing and push to connect fittings and check valves to accomplish the filling. The casement is a wood frame with plastic sheeting wrapped around it. I wanted it to fire about once per sec...

Is there an advantage to 3 valves? The pressure in the barrel once the valve opens can only be as high as the pressure in the chamber requardless of the number of valves. I would think that unless you had a very large barrel that the third valve would yeild a negligible performance increase. I am no...

This is for a product video and not everyone is cool with guns these days so we want to walk that line between cool gatling gun and harmless powder launcher carefully. I fdont want to make it look boring but I don't want to make it look violent either...it's the world we live in :roll: Why would yo...

Thank you! And yes we will absolutely avoid ignition sources. I was thinking about that as well. I believe the shoot will be in an empty warehouse and no fire will be involved. We will also forbid smoking. I did come accross those diesel check valves and I think you are right about them being my bes...

Finished the sequential trigger system just now. It is setup to be adjustable in terms of delay between each barrel and it ignores multiple button presses within 5 seconds. [youtube]https://youtu.be/hPp0oH_3fTw[/youtube] If you haven't worked with relays before what is happening in the video is that...

Here are some more build images. Ignore the build mess :lol: https://scontent.fmci1-2.fna.fbcdn.net/v/t1.0-9/34962531_10155629162317338_1107626508920291328_n.jpg?_nc_cat=0&oh=c34fb569f04c84d2b50c620f1b2010b0&oe=5BA5A19C https://scontent.fmci1-2.fna.fbcdn.net/v/t1.0-9/36003226_10155629162527338_80309...

Hello everyone, I haven't been on here for quite some time but what was once a small hobby has given rise to a potential buisness opportunity. We are putting together a video shoot for a product in which we want to film powder in high speed (possibly with a Phantom camera). I decided to take on the ...

Im planning to build my first piston valved potato (nature friendly) cannon. I have some experience with piston valves from my dart gun build which some of you may remember (see avatar). As of now I am not sure on the exact design as I am pricing it out and trying to see what pressure rated parts I ...

Now that the snow has melted im thinking of building an upscaled version. Ill keep you all updated

I decided to go for the gold and try a good ole quarter Atfirst after I shot I didnt here it fall like I normally do but eventually look what I found http://i293.photobucket.com/albums/mm53/braddubya/P1000159.jpg In the crotch http://i293.photobucket.com/albums/mm53/braddubya/P1000163.jpg Out the ea...

Yea im quite happy with its performance thus far. Could still use some tweaking though

I have not yet tried ggdt Casino. Is pretty straight forward?

Try number two http://i293.photobucket.com/albums/mm53/braddubya/P1000153.jpg http://i293.photobucket.com/albums/mm53/braddubya/P1000154.jpg It actually passed right through the penny and knocked the plastic fletching off before embedding itself atleast half an inch into a 2x4 but I put it back toge...

it was also at a distance of about 20' :D I may pull it apart get the piston to actuate better and the bump the psi up to 150ish and see how a coin handles it. EDIT: Ask and you shall recieve http://i293.photobucket.com/albums/mm53/braddubya/P1000150.jpg http://i293.photobucket.com/albums/mm53/bradd...

Thanks all for the comments and advice! If I decide to pull it apart I will definitely drill out the piston to reduce weight and make it fit tighter. For now though it is working pretty well :twisted: UPDATE: I tried it again at 100psi with some very interesting results! http://i293.photobucket.com/...