A while ago I drew up some plans for a scratch built turntable, and for several years they only remained drawings. A few weeks ago I started building this thing and it's been a lot of fun so I wanted to share my my progress. Hopefully this can entertain and inspire some!
The bridge frame is 30" long (to accommodate my J1a) and made from 7/32 brass tubing soldered together. I wanted to use tubing in order to keep the weight down and the result is lightweight and very strong.
I plan to make the bogies out of these brass I beams I made. One on either side of a couple of insulated bearings which will act as the wheels. The weight of the turntable is going to rest on the pit rail and it will supply power to the center rail.
The bridge is going to pivot inside this wider diameter brass tube which should carry the power for the outside rail.
This is what I have so far. And it's my first time attempting a project like this so please send questions and suggestions my way! More updates to come!