Originally Posted by
Bell_ringer
A 22 is somewhat lighter, you can operate a 22 hot and hi, you can't in a cabri. Heavy and low power isn't a good combo.
It is also assumed that - all things equal - a Fenestron uses twice the power compared to a traditional tail rotor. In the hover this can easily exceed 20% of the power produced by the engine (vs 10% in a R22).
The experts will have more accurate figures. But by any standards, that's a lot of power that is not available for lift.