Hollywood Foundry (of Australia of all places) builds these finely crafted mechanisms built to perform and last. So I had them build one for my Ken Kidder Birney.
The specifications I used for the Birney car drive mechanism are: 28mm wheelbase, 26” wheels, Mashima 1024 motor, a 31:1 gearbox reduction ratio, and wired for common wheels and trolley pole reversing.
Time to build up the momentum on this project again and get it moving full steam ahead. Yessir! Full steam ahead!