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I bought a $40 non-working mobility cart at a yard sale. I got lucky and, although the wiring was all screwed up , the 24 volt motor still worked.
When I bought it I told my wife this was HER aircraft tug. It was a way of getting her partially involved in the plane. Of course now the pressure was on me to actually make it work.
I ripped all of the wiring out and put a toggle switch on/off control on the mini-panel. I quickly learned that I would need a motor speed controller to be able to slowly accelerate the plane. Amazon came thru with a $6, 24 volt speed controller. I had no idea if it would work since I know pretty much squat about electrical systems. I added it to the circuit and it worked like a charm.
I made a tow bar from bolted together angle ( I don't know how to weld). Teh first one failed after the first use but the second one is working fine so far.
I needed the tug because I'm old and the plane has to be moved about 75 feet from my hanger to get to a paved area where it can be started (nothing but gravel in between).
Here's Linda towing the plane for the first time: