Here is a screen shot of the basic design;
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I started on a jar-top valve mod.
The solenoid thread is 3/4-20. I had the tap on hand, so I chucked up the lid;
And popped out the centre bit with an end mill;
Then finished bored to the tap drill size;
Then continued the threads, through to the inside;
I then turned and threaded an insert to match;
A generous chamfer was added to capture and seat the o-ring;
And together;
Here are some of the other parts in progress;
Mr Smith has a PVC tank in between the air supply and the valve. Is there any need for this if you are running from an air compressor. A bit of a reservoir charging up while the gun is firing?
What would be a good shape for the projectile?
Thanks!
-KB