RE: Japanese F3A Championship in Kurobe
Undoubtely the system develops more torque and less rpm; so he can choose to use more pitch or more diameter.
I made some numbers for gearboxes and the first result indicates me that a 50% rpm gives a gearbox in no less than 800 g. This system is for sure less than that.
I suspect that we will see that solution more ofetn from now.