This is a test of pitch change range in the new version (version 4) of variable pitch hub for scale RC plane. The previous version of this device is used in Tucano 60 (http://youtu.be/GttqkUZJZ0Q). The new device has less parts and should be stronger and easier to scale up.
Moving the pitch change lever by 20mm the pitch is changed by 120 degree (possible to setup from reverse thrust to prop feathering). Next step will be to test the hub running.