so... how does this work?

mobobuff

Lifer
Apr 5, 2004
11,099
1
81
My first reaction was that the frame rate of the camera happened to be synchronized with the speed of the prop, but it looks like the chopper rises at one point, meaning the props wouldn't be at a consistent speed, so you'd see motion. So I really don't know.

What supports this is the illusion that the tail prop is spinning extremely slowly, again because of the camera framerate.

There's a video I saw a long time ago of someone doing a power slide in a Porsche, and the framerate made the wheels look as though they weren't even spinning. You see this kind of illusion in videos all the time.
 

Vinfinite

Golden Member
Aug 25, 2005
1,639
0
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Originally posted by: mobobuff
My first reaction was that the frame rate of the camera happened to be synchronized with the speed of the prop, but it looks like the chopper rises at one point, meaning the props wouldn't be at a consistent speed, so you'd see motion. So I really don't know.

What supports this is the illusion that the tail prop is spinning extremely slowly, again because of the camera framerate.

There's a video I saw a long time ago of someone doing a power slide in a Porsche, and the framerate made the wheels look as though they weren't even spinning. You see this kind of illusion in videos all the time.

wow never thought of that, nice.

I'd like to change my answer to this please
 

esun

Platinum Member
Nov 12, 2001
2,214
0
0
If it isn't a physical illusion (i.e. a fake helicopter or a model), then it could be that the finite sampling speed of the camera happens to match the rotation rate of the blades (or some fraction of it making the blades appear stationary). This would be the same reason car tires appear to spin very slowly (or sometimes backwards) on film as well.
 

irishScott

Lifer
Oct 10, 2006
21,562
3
0
Unless they gave the chopper the direct lift system used in the harrier, I say fake. Didn't see an opening for a lift fan.