:D
That's awesome dude. Very clean, nice and simple. Is that a stock off an airsoft L96?
So you did get the blowgun to work! Good to see! The error must be the deadspace in my cannon, then. Right now the seals are busted in my blowgun, but I do have another unmodded blowgun I could try out, since ...

Sounds good! I'm by no means knowledgeable on improving performance in the piston valve... I think GGDT would be your friend here. I remember reading somewhere about an ideal ratio between the seat diameter and the piston travel. It all has to do with how much air can flow between the sealing face ...

Hm, that's unfortunate :(

How far does the piston travel? For how long a distance is the back end ID that narrower diameter? If you reduced the travel by moving the barrel backwards (so that the piston only travels within that tighter ID), would that restrict air flow much?

Hope you get it ...

Nice! I wouldn't have thought to use hot glue to fill dead space. I'll keep it in mind.

On the flaky actuating piston, JSR probably has a lot more helpful advice than I do; I had similar questions on my pen gun that he helped me with. But I'll contribute what I can.

Possible problems could be ...

What did you fix and what did you machine the metal for?

I'm pretty sure my T setup will work with the right fixes. First, I need to modify the blowgun. There's also something called PEX pipe, which is like a softer plumbing pipe, even more dirt cheap than PVC at Home Depot, and the 1/2" size will ...

Wow, that's awesome! I'm really glad to return the help in the spudding community after all I've learned. hahaha :P Looking forward to the finished product!

On the blowgun pilot valve, yes... your suspicions are true. I actually never got the blowgun setup to work reliably because of all the dead ...

Sounds like a good improvement. I'll take care of that once time allows. Currently, college apps are overwhelming.

Thanks JSR!
There aren't any baffles in the suppressor... How much would they help? Would they just be, say, wood or plexiglass disks spaced apart?

the side surfaces of the 3/4" endcap needs to be a sliding fit inside the chamber.
The washer doesn't rub the sides of the chamber, so the evenness isn't critical, but make sure the washer can seal the barrel in all circumstances. The bolt joint with the washer and endcap should be airtight so air ...

You could trim that down, making sure to keep the edge even, but it's up to you. I used a 1.25" rubber washer.

Yep! It's a flat 3/4" endcap bound with electrical tape in order to close up the gap (because the endcap's side surface is tapered, this increases the diameter of the narrower end). There is a rubber washer bolted on the front (bolt head on the inside) with a small washer between the nut and the ...

Hello spudfiles! :) First, some background: Someone turned on the spudding switch on me lately... and so I was itching to get back in the groove. The last piston cannon I built (3 years ago, freshman year) failed because of flow issues... It was a 2 inch tee barrel sealing cannon. I'll work on that ...

OK, just did. Here's the video:

Hold on, doesn't the link work? Just to verify... I'm almost positive it should...

Wow, haha. That was a quick reply. Thanks for the comment!

yeah the pump was only 25 bucks at Sports Chalet. It was an impulse buy, actually (I knew I would be using it for guns like this even though I hadn't made any yet).