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Old 26th Sep 2016, 12:12
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balaton
 
Join Date: Mar 2007
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A Very Basic Technical Question

Hi Dear Guys,


Please accept the appologies of a FW guy who just recently started to fall in love with helis and started to admire and envy helicopter pilots.
I went through many books on the basics of helicopter flying/physics/aerodynamics and have a couple of hours in a simulator, still one technical question remained which is still bothering me (probably stupid):
To my knowledge the rotor "disc" of a simple system (like the B206) can "pitch" and "roll" freely (as seen in some tutorial animations).
If one exceeds the mechanical limits of this free motion you will have "mast bumping".
Now, despite this free motion of the disc, the body (airframe) of a helicopter is obviously pitching and rolling, so, there must be some moment exerted by the disc to the rotor mast.
How is it possible if the rotor "disc" (rotor blades flapping) is moving freely? How is it possible without bumping the mast?
I just hope that my question is clear enough, appreciate your help,


Tamas
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