Mmmmm ....
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Means the Tail Rotor uses less horsepower.
Yes to a certain extent .... what it really does is to improve the aerodynamics around the tailboom which in turn allows for reduced T/R pedal inputs.
This also reduces the stress on the tailboom structure (which on the 205/212/412 series is significant).
For more info try .....
BLR Aerospace - Performance Innovation.
Cheers ...
