This is a Nitinol Heat Motor.

To assemble it you will need 3 ball bearing (20mm outer diameter, 10mm inner, 5 or 10mm width), one M10 bolt with at least 40mm length with matching nut, 10mm shaft for main hub, and last but not least 15 nitinol springs 20 to 30mm length.

Springs attach to the pins.
2 bearings go in the middle of the stand.
1 bearing goes to one side of the gear.
Bolt goes through the gear, nut attaches on the other side of the bearing.
Shaft for hub goes through the center, you could glue it in the hub for less wear.

If you are going to use water, fill the water up to the hub.

There is an alternativ place to attach the gear that will offset the motors bottom level. This is for testing the effectiveness of different settings.


This design is untested, if you build it please post your results!
File contains all STL files.