Ertl Ford 7710 Tractor

[frizzen]

I was going to post that it's about this far along. Made a pair of wheel adapter bushings out of brass shaft couplers, body has the axle tubes cut off and opened up to accept motors, gearmotors ready to epoxy in.


Apparently Imgur did some 'update' so i've got to relearn how to use it

https://imgur.com/a/1cnOYB3



Yes, that's a garden tractor, should also be interesting...

[sparkycuda]

To make an "electrical differential", wire the two motors in series. When one wheel senses a heavier load (usually the inside wheel when turning) the other wheel will speed up. Of course, you have to use different voltage motors than normal - ex: if 12V battery, then each motor should be rated at 6V.
This method is used in some model wheel loaders that have 4 wheel motors. Motors on each axle are in series, while the front & rear axles are wired in parallel.

Ken