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Old 22nd Dec 2007, 12:48
  #20 (permalink)  
NickLappos
 
Join Date: Apr 2003
Location: USA
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again, helicomparitor shows how little he knows about what makes helicopters tick.

The broad flat area of the horizontal tail, as well as the tailcone, present area for the main rotor downwash to act on, as vertical drag, even when the surface is stalled. In fact, the down force is greatest when it is stalled. They certainly produce download in a hover and in low speed flight. (How would the NOTAR work otherwise?)

The nose up for the 92 is greatest at about 10 to 15 knots of forward speed at aftmost CG, and even at that, trials by various independent agencies (including those who bought the aircraft for SAR) show that recovering a litter is quite easy, as long as the large door (1.33M wide) is fitted. Door size, cabin width to rotate the litter and surprisingly decent downwash are all judged to be supportive of the task.
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