Loosen up the split gear on a Raptor 50

The Raptor 50 V2 uses a split gear to have a driven tail during autorotations. However, the gear needs to be loosened up before installation. If you do that, you loose less energy when going to throttle hold to enter the autorotation.

The original white gear moves very difficult over the aluminum autorotation hub. It is designed this way to give the white tail gear some support since it is pulled towards the back of the heli by the tail belt. It is supposed to wear in over time, but this takes way too long. The method described below, will wear in the tail gear so that it rotates freely, and is still properly supported by the aluminium autorotation hub.

Just put the main shaft in a drilling machine, and attach the autorotation hub with the grey gear and the white tail gear to the main shaft as shown in the picture below.

Now hold the grey gear as shown, and slowly start the drilling machine. Now increase the speed of the drilling machine, and keep it rotating until the white gear starts to spin freely. Let it cool down for a couple of seconds, and feel if it rotates freely. If not, repeat this a couple of times. This will perfectly match the new white gear to your aluminum autorotation hub so that it rotates as it should, and that it is still properly supported by the autorotation hub.

This fix will only take a couple of minutes and is much easier than grinding or sanding the white gear! Furthermore, this way guarantees a perfect round fit with good support.