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-   -   How does this helicopter fly? (https://www.airlinepilotforums.com/hangar-talk/26976-how-does-helicopter-fly.html)

hotshot 06-02-2008 12:31 PM

How does this helicopter fly?
 
Try figuring this one out:
http://www.youtube.com/watch?v=b8Ck2CxXAdk

airventure 06-02-2008 01:35 PM

The rotors are moving, it's just the video camera's shutter/refresh rate that causes them to appear to stop.

flightfreak86 06-02-2008 01:37 PM

Because it is so ugly the earth repels it.

flyingback 06-02-2008 03:12 PM

Russki antigravity.

SmoothOnTop 06-02-2008 04:13 PM

Do y'all see the rotor's shadows on the fuselage?

rickair7777 06-02-2008 06:56 PM


Originally Posted by SmoothOnTop (Post 395604)
Do y'all see the rotor's shadows on the fuselage?

I've seen Mi-23's operate, and their rotors have always been turning like any other helo :rolleyes:

If the frame rate equaled the rotor rpm (or a fraction equal to the blade spacing) then both the rotors and their shadows could appear stopped. The pilot may have been deliberately trying to produce this effect, because it appears that he tried hard to keep the rotor rpm constant while manuevering...I would have expected more rpm variations.

It could also be photoshop job.

hotshot 06-03-2008 01:08 PM


Originally Posted by airventure (Post 395481)
The rotors are moving, it's just the video camera's shutter/refresh rate that causes them to appear to stop.


Originally Posted by rickair7777 (Post 395691)
I've seen Mi-23's operate, and their rotors have always been turning like any other helo :rolleyes:

If the frame rate equaled the rotor rpm (or a fraction equal to the blade spacing) then both the rotors and their shadows could appear stopped. The pilot may have been deliberately trying to produce this effect, because it appears that he tried hard to keep the rotor rpm constant while manuevering...I would have expected more rpm variations.

It could also be photoshop job.

I didn't shoot the video, but that would be my guess as well. It certainly looks pretty neat.

Scout 06-03-2008 02:01 PM


Originally Posted by rickair7777 (Post 395691)
I've seen Mi-23's operate, and their rotors have always been turning like any other helo :rolleyes:

If the frame rate equaled the rotor rpm (or a fraction equal to the blade spacing) then both the rotors and their shadows could appear stopped. The pilot may have been deliberately trying to produce this effect, because it appears that he tried hard to keep the rotor rpm constant while manuevering...I would have expected more rpm variations.

It could also be photoshop job.

It's a MI-24J (export version); tail rotors turn approx 3:1 to the main rotor. The engine(s) governor keeps the main rotor at 100% RPM with very little rotor droop as long as there is a low demand as far as collective or anti-torque (tail rotor) imputes. No photoshop needed! If your near El Paso TX, you may see some flying, at Ft. Bliss the U.S. Army has a half a dozen they are teaching the Afghan and Iraqi Army to fly.

CrimsonEclipse 06-03-2008 02:13 PM


Originally Posted by flightfreak86 (Post 395484)
Because it is so ugly the earth repels it.



It beats the air into submission.

CE

wrxsteve 06-03-2008 04:17 PM

its the refresh rate of the camera.... thats why you see most racing videos where the back of a cars taillight when it brakes looks like its blinking constantly when in reality its not


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