This makes a great addition to the helicopter controls. This design is based on the twist throttle of the Bell 212. The throttle grip rotates a 180 degrees. A precise hall sensor is used for position data. Designed to fit on a 25mm shaft. 
 
This can be used a single or twin engine throttle by simply creating two units. 
 
The build guide and components list can be found here:
https://www.737diysim.com/copy-of-build-guides-1