My new toy. It shots nerf darts and everything attached to a dart. The Problem with the "uncompressable" venturi mix is solved by some valves. . The first valve is a one way valve operatet by gravity. from there the mix goes in the Chamber. it is coaxial in the T-Piece. there is a 1/2 inch steeltube...

I have built a nice little 1kg chamber golf ball launcher with QEV valve and slide release, the barrel about 13inches long with bore diameter .5mm windage play with ball. Using a skirted ball from pvc tubing the ball shoots fine at 100psi, twice as far with 200. A bit new to the game and asked many ...

A piston valve works well, and you can build it yourself. Actually, it is quite simple.
viewtopic.php?f=26&t=8157
spud_wiki/index.php?title=Piston_valve
This type of valve releases the air very quickly.

Hi all. It's been quite some time since I've logged on, I like the new site layout! I just realized I only have a thread on my 4L propane cannon and not my pneumatic. Just dug it out of the basement. I will clean it up and work on removing the non pressure rated bell reducer in favor of some bushing...

Does anyone have the internal design of the trigger mechanisms for the t-shirt launcher?

What Jack said.

Plus, more than one spark increases the spark gap, that means the gaps need to be smaller if you are going to use the BBQ piezo.

BTW, multiple sparks must be wired in series, not in parallel.
http://www.advancedspuds.com/multiple.htm

Been away too long. Remembered this site after coming across photos of my old gun MFIC from https://spudfiles.com/viewtopic.php?f=27&t=25266 - lots of changes in m life from 8 years ago! Time to update the build log with the fate of MFIC.

I designed one launcher using a Deltrol 3/4" QEV and their published Cv feeding a tennis ball barrel (SDR21 2.5). Actual performance was about half of predicted, as I recall (it was a very long time ago). I suspect they measure Cv for exhausting an air cylinder (their intended application), and this...

Ah, nostalgia. It sure is! I thought you were gone from the forums! I havent had much time to stay updated the last decade or so.. Writing this makes me feel old! I don't visit often any more, but the week you posted this thread happened to be the same week I decided to check the forum for the firs...

Shot a few shots agains today, something happened to the video during export though. Will have to do for now.

Good to see you back here. I'm pretty sure Larda still holds the record for the most extreme hybrid, barring the circus man-caliber sized cannon VERA of course. No way anyone passes VERA in the energy category without some serious resources and permits and all kinds of crap. It's a 2X hybrid the siz...

Norguns wrote: ↑

Sat Mar 27, 2021 11:56 am

I get what you are saying, I might not get any real velocity gain from it. That being said, the entry fee for evacuating the air from the barrel is low on my setup and i might play with it at a later time.

You owe it to yourself to try :)

SpudBlaster15 wrote: ↑

Sat Mar 27, 2021 9:10 pm

Ah, nostalgia.

It sure is! I thought you were gone from the forums! I havent had much time to stay updated the last decade or so.. Writing this makes me feel old!
Anyone heard from DYI?

Ah, nostalgia.

Fantastic shooting area you have there! Yes, once I get the gun mobile and aimable I can do whatever I want. I plan on getting it up to 40x mixes once its more practical, and more if nothing has failed yet. Depends on how much pressure I can get before ignition with a spark gap becomes impractical....