1941 jello vision

You mean because of the curvature? The blades flexed while in motion; you'll see that in pretty much any action shot of it. :)
 
They are flexing on the y axis! Think about it.

Anyhow, this is simply because motion picture films and cameras are not global shutter. The shutter of a film camera spin open and shut.... obviously letting one area of the frame receive and lose the light fractions of fractions of a second before the other side of the frame.

But if you think it's as bad as we have it on D90 and etc.... guess again.
 
X axis-right to left bending. Slight y axis bottom to top deflection. The picture was likely taken with a focal plane shutter still camera, a mechanical equivelent of a cmos imager as per the temporal nature of the exposure of one frame.
 
I remeber the days when wagon wheels would spin backwards through our shots and it was just about all anyone was posting on the forums.
 
Got to be the shutter. It looks as though it is bending in the x-axis toward the leading edge.
 
The stuff out in front of the nose is usually where the pitot-static (pressure) tubes are, to avoid interference from the flow over the body. All of that tubing out there indicates this may have been a test article.

And FWIW, helicopter blade dynamics are quite complex, the blades are actually twisting and bending about all three axes simultaneously depending on where they are in rotor circle.

Also, if the pic was taken with a focal plane shutter, as mentioned, then the direction left or right of the movement of the shutter, would have an effect on the appearance of the motion.
 
Dick Campbell said:
And FWIW, helicopter blade dynamics are quite complex, the blades are actually twisting and bending about all three axes simultaneously depending on where they are in rotor circle.
Click to expand...

Part of why the rigid rotor concept is so appealing. Stronger, and simpler...
 
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