We needed a way to accurately measure our engine thrust and there was nothing out there we could use.
So we created the CK Aero Thrust Measurement Tool!
It's tapped to easily screw onto any 8mm x 1.25 shaft. Compatible with YS engines and several electric setups.
3D printed out of lightweight plastic with 4 flat sides to verify measurements on each side. We recommend using the average of your measurements on each side.
We use this to setup every airplane we get our hands on. Now you can, too!