This is my version of Joel's TSL-1500 except that I used a Rainbird PEB-150 instead of a Supah Valve. This launcher is an O/U design, as are most of my launchers. I like the looks and the OAL of the launcher is dramatically reduced. Note that I could have probably doubled the length of the barrel which would have increased the performace by quite a bit, but at the sake of portability. I may still do that, and the inter-changeable barrels should make it an easy task. Testing with this barrel has been limited, but shows a lot of promise.
Arsondevine posted this drawing for me on his site. Thanks Arson. Arson has posted many pics from various spudders along with his own handiwork. His Air Powered Guns site contains a wealth of info and pics. Check it out.
In an over-under design such as this, I always try to reduce the space between the barrel and the chamber to a bare minimum, mainly for aesthetics, but also to strengthen the joint at the two elbows. This is done by careful measurements with the street elbows together, but not glued. Measure the distance between the elbows with the launcher "mocked up". Then measure the distance from the outside edge to the bottom inside "stop ridge" of the elbow and add this measurement to the previous measurement. This is the length of the pipe that will connect the two elbows together. I also make sure that the two elbows are perfectly aligned to each other during glue-up, otherwise the barrel and the chamber will be skewed and not aligned with each other, not a pretty sight! Note that the barrel and the chamber are strapped together to further stabilize the weak point, the elbow connection.The elbows in this case are 1 1/2" and the pipe that connects the two elbows together is, of course, also 1 1/2".
The Rainbird PEB 150 was chopped for pneumatic actuation and the solenoid discarded. Plug the solenoid port with JB Weld or equivalent. This valve has a manual flow adjustment that is not used in this application. I removed the offending parts and replaced them with a 5/8" bolt that was drilled and tapped for a 1/8" NPT thread. This tapped hole was used to install the blowgun pilot trigger.
See the pic below for the details on the bolt. |
