http://www.aviationtoday.com Aviation Today en-us 2013 Sat, 25 May 2013 22:41:19 EDT Honda Aircraft Co. completed the first flight of its FAA-conforming HondaJet light business jet, the company announced Dec. 21. The airframer said the flight is a "significant step in Hondas aerospace program leading to delivery of aircraft in 2012." The first conforming HondaJet lifted off Dec. 20... http://www.aviationtoday.com/rw/what_the_experts_are_saying/rotorcraft_aerodynamics/Video-Army-AFDD-Director-Spivey-on-Helicopter-Aerodynamics_76767.html Thu, 12 Jul 2012 0:00:00 EDT Question: Why does a helicopter with rotors turning clockwise (e.g., Lama or Mil Mi-8) gain height in a steady spot turn to right and lose height in a left spot turn? Answer: In helicopters with a conventional main/tail rotor, any increase in pedal application that opposes the torque effect of the main rotor... http://www.aviationtoday.com/rw/what_the_experts_are_saying/rotorcraft_aerodynamics/Height-Variations-in-RightLeft-Spot-Turns-with-Rotors-Turning-Clockwise_75109.html Tue, 29 Nov 2011 0:00:00 EST Question: Why does the Eurocopter AS350 AStar flight manual list a different Vne (never exceed speed) for “power-on” vs. “power-off” flight? It lists 155 kts at SL, Std. Day power-on, and 125 knots at SL, Std. Day power-off. Shouldn’t the maximum speed of the aircraft be the... http://www.aviationtoday.com/rw/what_the_experts_are_saying/rotorcraft_aerodynamics/Velocity-to-Never-Exceed-VNE-Eurocopter-AS350_75110.html Tue, 29 Nov 2011 0:00:00 EST Question: Could you please address the issue of loss of tail-rotor effectiveness, specifically in a Bell 206. I would like to know why (on some helicopters) when the engine does not have sufficient power in high-power flight conditions the main rotor speed will slow and the aircraft will then start a slow... http://www.aviationtoday.com/rw/what_the_experts_are_saying/rotorcraft_aerodynamics/Loss-of-Tail-Rotor-Effectiveness-Bell-206_75112.html Tue, 29 Nov 2011 0:00:00 EST Question: How would you calculate the rotor downwash velocity (in mph), specifically for the Hughes 500? Answer: Following the advice of Mr. Newton, we know that our rotor must produce an upward force, or thrust, equal to our helicopter’s weight if we are to hover. Since Force = (Mass) x... http://www.aviationtoday.com/rw/what_the_experts_are_saying/rotorcraft_aerodynamics/Calculating-Rotor-Downwash-Velocity_75113.html Tue, 29 Nov 2011 0:00:00 EST