Next version of my water fuel cell. Still under development.
Uses tubes with part #'s from McMaster-Carr.
89785K844 - 1/2" x 3.5" tube X 6
89785K837 - 3/8" x 4" tube X 6
Designed to fit in a 4" ABS tube. Use accompanying hole template to make holes in tube for the electrical contacts. Use the cap ring to isolate the middle tubes from the top.
With tube part numbers above, the gap between the tubes should be 0.7mm. With the length of the tubes indicated, the capacitance of each pair of tubes with air as the dielectric should measure approximately 43pf.
Dimensions are a very important element in the design of the water fuel cell if you want it to work the way Stan Meyer made them work. The dimensions here are according to my calculations for my system and won't necessarily work for your design. Do your homework.
Untested as of 2018-06-18
The original .stl for the main unit was 9mm too short. This has been corrected.
Updated some dimensions and corrected flaw that would prevent flow.
Major change. Shortened main cell body and made tube caps singles. Tubes should fit better now.