PPRuNe Forums - View Single Post - Certification of Robinson Helicopters (incl post by Frank Robinson)
Old 20th Nov 2000, 22:54
  #111 (permalink)  
Try_Cyclic
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Lu,
you say you are not getting through to me.
That isn't the problem. I understand your position rather well, but don't agree with it.
Now getting to your last example:
Yes, if I were to do the experiment that you suggest, then when the stick is moved fore and aft, the robby blades will move, etc, etc.
Yes, all this is true on the ground.
Unfortuneatly the blades are not rotating during this demonstration.
If you do the demonstration when the rotor is up to speed and THEN look at the way the rotor tilts you will see no difference betwen the Bell and the Robinson.
Magic? No it is called rotor dynamics.
There are forces on the rotor that come into play only when it is moving. Specifically I refer to the pitch-flap coupling.
The blades don't flap when they are standing still, so all you see is the effect of cyclic tilt. But that's not the whole picture.
Mr Robinson did not change the laws of physics. He simply understood them.
Lu, instead of twiddling the stick on the ground, perhaps you should actually fly in a R-22. I fly them and I see no indication of the ship not flying where I point it.