THUNDERLORD wrote:Double (but new info/ques.):
I really like this design,:
But I think it could be simplified (Greatly)
I have a question. Something I don't understand is how the pulse chamber continues to fill after the valve starts to move. If the initial pressure isn't high enough, and a cycle doesn't reach the ball launch position, I can see this as getting stuck with the piston just off the rear fill valve. Am I missing something?
Nevermind I think I figured it out. The main piston is a pop off valve with a small seat. I missed that. Maybe a slight change to the drawing to show a thin valve seat gasket would help.
I do like the design.
Maybe the valve ball and rod can be replaced with a caped pipe or tube. In the initial position, air would go into a port in the pipe to the chamber. As the valve pops off, the fill port remains open for part of the travel until the port goes through the back wall o ring gasket.
This design change with the longer rod won't suffer the possibility of the present rod from getting vibrations and missing the fill valve hole.
After launch, the chamber would get a head start refilling. It would make the rod lighter being hollow and possibly increase the fire rate. Maybe the o ring would add too much friction. I should stop typing while brainstorming.
Just an idea. I do like the design.