http://emuse.ebaumsworld.com/video/watch/21751
Is this copter using vertical thrust from a turbing engine to stay in the air? Or is a trick using the camera timed in sinc with the spinning of the blades to make it appear like its not turning?
2007-06-03 15:39:25 · 14 answers · asked by Anonymous in Cars & Transportation ➔ Aircraft
Okay so the video isn't real but what I really care to know is, IS THIS POSSIBLE? thanks
2007-06-03 15:56:54 · update #1
No, it is not possible. If the blades stop turning, then no lift is produced, and the aircraft would fall. We have a saying that "RPM is life", because lift is dependent upon the airflow over the airfoils (rotor blades). When the blades are too slow, or stopped, they will be stalled, and will stop producing lift.
They must have used the camera speed to make the video, as others have noted.
2007-06-03 16:35:37 · answer #1 · answered by Apollo 6 · 0⤊ 0⤋
One of the first things that should send up a red flag is the main rotor is not turning but the tail rotor is.
Since these are connected that would be a problem, at least in every helicopter I have flown and I have flown everything from a Bell-47 to a CH 47.
I like the camera theory explained by some of the others
2007-06-04 04:00:17 · answer #2 · answered by walt554 5 · 0⤊ 0⤋
The rotors are spinning, however the camera speed is so that it catches the rotors in exactly the same spot in every frame.
Comparison:
When you are looking at a car wheel as the car is moving, depending on how fast it is spinning, you get the illusion that the wheel is either standing still, or moving in reverse.
It is an optical illusion caused by the speed at which your eves, and in this case the camera can "see"... how many frames per second.
2007-06-04 18:58:38 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The camera's shutter is perfectly matched to the blades' rpm. Therefore, whenever the shutter is open (making a frame), there is a blade in the same position, so it only looks like the rotor is stopped. Note that the tail rotor doesn't have the same problem/coincidence.
2007-06-03 15:51:24 · answer #4 · answered by Yesugi 5 · 1⤊ 0⤋
The other thing that looks wrong is the rotor blades are bent upwards as they do when under load. When a chopper is on the ground the blades flop downwards. Interesting video all the same.
2007-06-03 15:50:47 · answer #5 · answered by Anonymous · 0⤊ 0⤋
No it is not true. The photographer played with the shutter speed of the camera to get that effect. We do it all the time to show the rotor system a little better.
2007-06-04 07:05:56 · answer #6 · answered by Chet W 2 · 0⤊ 0⤋
That's a camera trick for sure,because the rear rotor spins at a different speed,they could not stop it.
2007-06-03 16:03:30 · answer #7 · answered by gdwrnch40 6 · 0⤊ 0⤋
it is a trick the rotor blades keep the bird in the air it also provide lift,, the engines provide thrust there is something called auto rotation that is when you kill the engine and let the rtor blades help you to land safey
2007-06-03 15:46:09 · answer #8 · answered by thomasl 6 · 0⤊ 0⤋
It is due to the shutter speed of the camera matching that of the rotors.
It looks pretty cool, but you can hear the beat of the rotors regardless of what the camera "sees".
2007-06-03 20:05:52 · answer #9 · answered by ubereng1 2 · 0⤊ 0⤋
Interesting question! Could discuss this for hours. Due to the advent of vtol aircraft such as the harrier I believe it is possible. The issue would be stability in maneuvering. Maybe three separate sources of thrust could be utilized for stability and to an extent; control. vectoring the thrust could provide propulsion in any given direction, and on and on and on. EXCELLENT question!! As shown in the Vid..Impossible!
2007-06-04 15:45:17 · answer #10 · answered by Bill and Gin C 2 · 0⤊ 0⤋