I decided to connect the battery pack and swingarm mount to the existing Heinkel engine mount with a 1/4″ (6.35mm) metal plate. That way I could slide the entire assembly in and out of the car if necessary. The original engine takes about 90 minutes to fully remove, and it is a pain in the neck! I thought I could improve upon that just a little.
The swingarm supports the hub motor and is a key part of the suspension. It took me three tries to design and fabricate something that would work.
The swingarm had to do several things:
- Hold the hub motor in place
- Incorporate the Heinkel shock at the same angle and position as the original
- Be built in such a way that it didn’t hit the battery case in its range of motion.
Axle is from a GSX 750 motorcycle. Thanks to Steven Keegan at Eastern Cycle http://easterncycle.net/ for helping me figure this out!
Here it is: three tries and 20 pieces of steel welded together: