RE: Prerotator devices
Hi,
If you want to install a pre-rotator on the PTGyro, it's not difficult, thanks to Mickey's engineering. First, the PTGyro uses about a 2.4 mm rotor shaft and the PT 25 uses a 3.3 mm or .125". The GW/EPSC gear box will will accomadate the different size shafts. The standard is 3 mm. Then you mount the GW/LPS gearbox for the pre-rotator. You don't have to use the GWS brushed motor. By accident I discovered that the Feigao 128425 brushless motor fits the GWS gearbox perfectly and use a little 10 amp speed controller.
The GW/EPSC will mount on a .4" square tube, so now you have the holder with bearing and your pre-rotator. Now just remove the original bearings from the rotor head, install a bushing or whatever and pin the shaft to the rotor hub.
I have attached a picture, and also you will need the one-way bearing, available from Boca, any size that you need.
Phil