Dang, I was hoping nobody would notice. I made the actual cannon when I knew about nothing about PVC. I have brought it up to 50-60 psi though. Is this too high/dangerous?

Yes, while making it I realized it was probably not the safest firing mechanism as dropping the nunchuck would most likely fire the gun...

However, I can also easily make it remote controlled by simply attaching the servo to a R/C receiver, which I have done with success. The R/C also may actually ...

Hi Spudfiles,
Today I decided to show you the awesome-but-unnecessary trigger I made for an old air gun. Basically, it uses the accelerometer from a Wii Nunchuck to turn a servo, which in turn presses the blowgun valve. This is done using an Arduino and a high torque servo.The airgun is just your ...

I previously had the groove in my piston, but that didn't work. The piston that I'm currently using has no groove.

I am using 70 psi with the plastic container in the picture, not sure what I was using with the water bottle. Something much lower. Now that I look at the container, I'm thinking that maybe the problem is with the piston allowing enough air into the plastic container and the small bottle only ...

Actually, the water bottle is significantly smaller than the plastic container. You can't really see it in the picture but the plastic container is actually quite large. The piston is pretty tight, but it is well lubricated.

Hi spudders, I am currently in the process of finishing up my first piston valve launcher based on the design of mrredrooster (not sure of his spudfiles username). Here is the exact link if you are interested:
http://www.youtube.com/watch?v=vmxaI3_SJCg&feature=related
Anyway, I constructed the gun ...

What about something like this?
<a href="http://www.flickr.com/photos/45735212@N03/4199523629/" title="pistonthing by electrictape22, on Flickr"><img src="http://farm3.static.flickr.com/2736/4199523629_8d001d3f19_o.jpg" width="640" height="400" alt="pistonthing"></a>

Still, how do I put in the 1 ...

Hey there, recently built my first pneumatic with a sprinkler valve which is awesome. Now I am making a 2" piston valve gun. I was able to create the piston already from plywood discs and some rubber. However, now I have to create the gun. Here is my design:
<a href="http://www.flickr.com/photos ...