Helicopter main rotor blade flex - GIF

[Gadgeteer]

Helicopter main rotor blade flex.

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Previously:

http://www.homemadetools.net/forum/h...462#post135646
http://www.homemadetools.net/forum/l...486#post104356
http://www.homemadetools.net/forum/f...449#post135588
http://www.homemadetools.net/forum/m...677#post132967
http://www.homemadetools.net/forum/h...797#post129117
http://www.homemadetools.net/forum/h...3557#post78292

Great video, also shows how the rotor blade pitch changes on each revolution.