I’ve gotten a bit started on my copy of Joni’s single nozzle chip generator.
My dimensions are to his drawing but scaled by x1.27. Using the original 10mm nozzle diameted of his drawing I could not find a sturdy enough piece of steel. I have a roughly 12.~mm bore piston wrist pin however. It fits loosely in 3/4" black steel pipe so I welded that in place. Yes yes, the welds are ugly.
My restriction is 2" at the most narrow, recessed into the bottom of this 20lb propane tank. It is two bearing races welded together.
Joni prescribes the grate be attached directly to the recovery zone. I haven’t added this yet I am still looking for a thick enough tube to make for that.
After I get the reduction welded in, I will use another propane tank as the bottom. The top will be that car rim to size up for my other 20 gallon drum not being used for the Mazda reactor.
I’ll place gas exit high on the base to avoid grabbing as much char and ash as possible and I’ll weld in a pipe clean out at the bottom.