[Graeme Smith]

I did this conversion a long time ago to see if putting a Diesel Deltahawk engine into a RW would be a good idea. we managed to get it all working and started the testing. for the test we wanted to be safe so we tied down the RW in a tandem trailer still connected to my car and started the engine.
This setup has a centrifugal clutch and an isolating donut style damper with a seperate one way between the engine and the gearbox. I decided to keep the Vee belt drive line to the tail rotor so I replaced the secondary with a simple shaft and from the input to the gearbox we installed a toothed drive pulley driving the shaft to which the standard Vee pulley was mounted.

WE decided to not proceed with offering this upgrade, as the power that the engine put out was, in my opinion, way too much for the rotor system, as with the RW tied down to the trailer and 4 separate scales beneath each wheel we could pull and hold full up (+10deg) collective and raise and lower the RRPM via the throttle. at that point 2 of the scales had gone to zero and the other 2 showed we were lifting over 1000kg (2204lbs) I decided I could not trust that the RW rotor system could handle that much power so we abandoned the idea and built a brand new helicopter with the DH engine , the DH2