A cell housing for 7 tubes for a water fuel cell. I designed it to be size compatible with 4" inner diameter clear pipe. Untested by me at this time.
An updated version of this design can be found here:
Tubes it is designed for:
Outer diameter of outer tube 1"
Outer diameter of inner tube 3/4"
Outer tube is 77mm long.
Inner tube is 90mm long.
These are NOT the dimensions of Stan Meyer's tubes!
I make no claims whatsoever as to effectiveness, fit or suitability. This is here simply for interest sake.
This version has the same dimensions for the tubes as the original BUT extends the height by 3mm and makes the outer walls a little thicker. I recommend having wall thickness >1mm when printing. The holes for the contacts are 5mm in diameter, to be tapped for M6 screws. I have also made some nicer caps.