Did u know russian copters can fly with stopped rotors?

[Murmur 3,941]

http://clipaday.com/videos/how-can-this-helicopter-fly;) Marco

[Fitz505 21]

That's an easy one. I'm no expert, but I believe it's called the strobe effect, where it just looks like the rotor's are standing still. I'm sure someone will jump in with a more scientific explanation. I probably shouldn't have replied as I suspect you already know that. lol John

[tf51d 284]

> That's an easy one. I'm no expert, but I believe it's>called the strobe effect, where it just looks like the rotor's>are standing still. I'm sure someone will jump in with a more>scientific explanation.> I probably shouldn't have replied as I suspect you already>know that. lol>> >JohnI don't think thats the case here, notice the rotors are moving freely with the momentum of the helicopter! This has to be an elaborate hoax!!

[Murmur 3,941]

>I don't think thats the case here, notice the rotors are>moving freely with the momentum of the helicopter! This has to>be an elaborate hoax!!I think John is right. The rotor RPM, multiplied by the number of blades, is a multiple of camera frame/shutter rate.The slight RPM variations (inevitably happening during transitory power/load changes) give the impression of a freely moving rotor. :)Marco

[C-JEAN 1]

Hi, detective PICs ! > called the strobe effect, where it just looks like> the rotor's are standing still. . . .LOOKS like. . . Exactly. And the proof that the big rotor ISrotating is: The small tail rotor, out of timing withthe video's FramesPerSecond ( FPS ), IS rotating. And we all know that the 2 rotors are interconnectedthrue a "gear box". . .Blue skies.

[Guest Adrian Wainer]

The blades of a helicopter are in fact similar to the wings of an aircraft, it may be this was a technical demonstration of flying this helicopter with a stopped rotor. If, so the stub wings on the fuselage would provide some lift and the exhaust for the gas turbines some forward thrust and with the helicopter lightly loaded e.g. small amount of fuel, armour removed etc, perhaps this helicopter can fly a shallow descent with a stopped rotor.http://avia.russian.ee/helicopters_eng/ka-22.phphttp://www.rcgroups.com/forums/showthread.php?t=679820http://www.internetage.com/cartercopters/pics9.htmhttp://en.wikipedia.org/wiki/Gyrodynes_and_Heliplaneshttp://www.gyropilot.co.uk/downloads/Rotod...20RTF%20Mod.pdf

Best and Warm RegardsAdrian Wainer

[Guest Adrian Wainer]

Piasecki flies X-49A SpeedHawk compound helicopter http://www.geocities.com/tacticalstudiesgr...iaseckivtdp.htmhttp://www.flightglobal.com/articles/2007/...helicopter.htmlBest and Warm RegardsAdrian Wainer

[Fitz505 21]

I doubt if those little stubs would provide much lift for gliding a huge beast like that (I think a Hind weights over 9 tons empty!) , especially through all the maneuvers he was doing. He was doing 360's while almost in a hover at one point. Plus I think the rotors continue to rotate even if they are shut down. Isn't that what they call auto rotation? I think I'll stick with the strobe effect for now. However, I also wouldn't put pass someone doing some digital editing. John

[Cessnaflyer 56]

Many resources unfortunately none of them deal with what is happening here which is a camera effect with frame speed.

[jagabom 21]

It just seems too perfect. I don't know if the RPM of the blades could be held that perfect.JimCYWG

[KevinAu 441]

>It just seems too perfect. I don't know if the RPM of the>blades could be held that perfect.>Jim>CYWGWhy? Isn't that the job of the rpm governor?Here is a video of an Osprey with its rotors stopped as well.http://shock.military.com/Shock/videos.do?...t=142317&page=1

[Cessnaflyer 56]

You'll notice they are moving and that the tail rotor is moving as well.