Anti-gravity(?) heli

[Xeeshan]

Will someone please enlighten me about this machine?
It (appears to be?) an anti gravity chopper . Does anyone here, has any idea?
The sound of the rotor, suggests me a lower frame rate of camera and hence the fins are appearing as static...

 

[booo]

I read somewhere that the video was taken using a radar controlled camera. During the testing of the chopper to check if the blades bend due to stress.

 

[mjnaushad]

the FPS of the camera and RPM of the helli rotors matched. Thats why its looking like a Anti gravity Heli.

Like the rotors starts its circle from point A the camera took first snap and when the rotor complete the circle and reach point A again the camera took 2nd snap. and its go on.....

hope you got my point.

 

[AZADPAKISTAN2009]

Its a RC helicopter held by a string - and the sound has been added in later for effects

 

[DANGER-ZONE]

the FPS of the camera and RPM of the helli rotors matched. Thats why its looking like a Anti gravity Heli.

Like the rotors starts its circle from point A the camera took first snap and when the rotor complete the circle and reach point A again the camera took 2nd snap. and its go on.....

hope you got my point.

yup i agree with u,it a claver trick of using camera.
we can clearly hear the sound of rotating blades.

 

[Xeeshan]

the FPS of the camera and RPM of the helli rotors matched. Thats why its looking like a Anti gravity Heli.

Like the rotors starts its circle from point A the camera took first snap and when the rotor complete the circle and reach point A again the camera took 2nd snap. and its go on.....

hope you got my point.

That is what i thought as well. U made it even more clear.

 

[Xeeshan]

It clarifies one more point to me, there doesn't exits any such machine as yet.

 

[Awesome]

Nice, clever trick. It looks like it was done without any special effects.

 

[Comet]

Nice Trick. It looks pretty cool

 

[sparklingway]

It's a Mi-24 Hind shot by a camera where the FPS and RPM of the blades are an integer multiple of each other.

At say FPS = 24
No. of Blades = 5
Rotation /frame/blade = 0.2*n
At 24 Fps = 24*.2*n = 4.8*n
RPM= 60*4.8*n = 288*n
Ratio = RPM/FPS = 288*n/24 = 12*n

So any integer multiple of 12 would do the trick.

 

[mjnaushad]

It's a Mi-24 Hind shot by a camera where the FPS and RPM of the blades are an integer multiple of each other.

At say FPS = 24
No. of Blades = 5
Rotation /frame/blade = 0.2*n
At 24 Fps = 24*.2*n = 4.8*n
RPM= 60*4.8*n = 288*n
Ratio = RPM/FPS = 288*n/24 = 12*n

So any integer multiple of 12 would do the trick.

You confused me more

Just kidding. True calculation. Are you maths professor ???

 

[sparklingway]

You confused me more

Just kidding. True calculation. Are you maths professor ???

A lowly engineering student

 

[Super Falcon]

it is a trick of camera if you seee the video carefully its taill rotors are moving if it is a real machines even its tail rotors should not been moving and why u need these rotors if yoou fly without them it is a trick nothing more than it

 

[graphican]

Camera does not record continuous images, rather it captures a certain numbeer of frames in one second. If it is PAL than 24 frames per second and if it NTSE, it captures 29.97 frames per seconds.

To achieve any trick in which a moving object is to be shown stationary, you go to match rate of rotation of an object with rate of frame capturing and when that is matched, the spinning object will appear standing as if still.

If you want too observe this phenomenon at home, At night, put all lights off and turn TV ON. After that turn your ceiling/pedestal fan on and play with its speeds. At a certain speed, the FAN will be spinning but will appear to stand as still. It will happen because TV also produces flickering light and when this flickering ratio matches the spinning ratio of spinning fan, the fan or any other rotating object will appear to stand still.

 

[Super Falcon]

hahahahhahahaha thanx for info great work