If you watch the blades carefully while the chopper climbs and drops, you can see the rotors changing their pitch, that is essentially how they control the ups and downs. Cool vid.
Personally I don’t read any comments to things on youtube etc. The stupid just makes me crabbier than usual.
Theres also a hell of a lot of kinetic energy stored in the rotor, and its not maneuvering that hard, so the speed is not going to alter terribly fast.
Awesome video though…
Actually, to get really pedantic, the frame rate needs to be an integer fraction of the RPM divided by the blade count.
I think they look just lovely with this paintjob:
Hmm… I don’t think this is true.
If N is the number of blades.
The absolute fastest frame rate that stops motion is equal to the rotor RPM x N. So if the rotor is turning at 1 RPS, and N = 5, you can have a frame rate of 5 FPS and appear to stop the motion, but you will then be seeing each successive blade in the same position.
Then, 1, 2, 3, 4, 5 etc. FPS will appear to stop the motion, and in this case, you will see the same blade in the same position.
Note that at integral multipliers of RPM x N yields an image that is frozen, but has more blades than reality (10 FPS gives the appearance of 10 blades, for 1 RPS, N=5).
Good catch. We now agree the blade count is significant, but I short-stroked the actual math.
I just want to say thanks, Johnny L.A. - I simply giggled through the whole video. 