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The NOTAR System :
The NOTAR anti-torque system gives superior safety and also the ability to be extreamly quiet. Those helicopters equipped with the NOTAR system have low insurance rates. They have the greatest compliance margain of any helicopter yet tested to both the ICAO and the FAA Stage 2 noise requirements.
The NOTAR System consists of an enclosed articulated fan driven unit by the main transmission, a circulation control tail boom, direct jet thruster, and vertical stabilisers. Low pressure air, forced through two slots on the tail boom, causes the main rotor downwash to ‘hug’ the contour of the boom, creating lateral lift that counteracts main rotor torque.
Originally posted by Figher Master FIN
Yeah, that looks a bit fake... a bit of The Commanche and a bit of the Apache... That's what my eyes tell me...
Originally posted by Shaker
One thing that you should keep in mind is that the speed of the blades as they spin towards the rear of the aircraft, left side if counter-clockwise spin and right if clockwise, determines maximum forward airspeed. Yes there are other factors such as drag and weight of the aircraft, but if the max speed of the blade is 220kts, that's the fastest it can theoretically go without the blade losing lift.
At least that's what a crew chief in the squadron told me...