Back at the start I said I couldn’t find a cross compound air pump, well I did find one made by AccuCraft by didn’t feel I wanted to pay their price for it so I built this one instead.
It is just made up from Styrene shapes and brass wire as you can see. Far from perfect but once painted and mounted I think it will serve the purpose.
For the low pressure air cylinder, bottom right in the finished picture, I couldn’t find anything the right diameter so turned down a CPVC 1/2 inch coupler and then mounted it in a vise and left it for a couple of days. This treatment caused it to hold the elliptical shape until I got it glued down.
That thing hanging off the side is the air intake/filter
All for now.