First of all, here's a link to the design i am currently making :
I'v been working for the past months to achieve a semi/full-auto pneumatic 6mm launcher design that would not require any springs nor special tools. I have'nt posted a lot since after seven different protoypes, only one worked relatively well (http://www.spudfiles.com/forums/6mm-sem ... 15353.html)
But i am having surprisingly good results with the protoype in the making. Out of the whole design i have completed the upper and lower tube setup and the twin pistons (separated by a shaft). The reason why i have not finnished the whole thing (i am missing the bolt in front of the piston and the magazine, wich i am sure it will work as i have done it in the past) is because my main priority was to try this double piston and see how it works.
And it works! And much better that what i was expecting, in fact, i was able to go full auto by using a simple pop-off safety valve as the pilot and simply putting constant air flow into the chamber.
A few other details : the pop-off goes off at 110 PSI, the burst of air that is shot would feel like a sting if my hand is about 4 inch or closer to output of air. I am estimating 10 burst of air per second, but i would need to record it to be sure. Long story short : Satisfing design, at last. Coupling the piston with a loading bolt will result in a full auto 6mm launcher.
I'll probably be able to trow in a video and a few pics of the prototype if anyone is interested.
Before going through with the rest of the design, i need to rebuid the whole thing. The epoxy was not applied correcly at many places and some tweaking in the internals could have made the whole thing faster/more powerful.
I'll get back to you as soon as i go through significant progress.
, nice work with jb weld.