Two rather neat helicopter videos
Woah, amazing!
I thought that the helicopter was just gliding at first, but the noise and the maneuvers cought my attention.
Honestly, this is some cool stuff.
I thought that the helicopter was just gliding at first, but the noise and the maneuvers cought my attention.
Honestly, this is some cool stuff.
Look at the comments 
IT'S A UFO!!
IT'S A UFO!!
lol, thats pretty cool
For the record, the helo isn't actually flying with fixed rotors... but I won't give it away. I'm sure someone will sort out what's going on if you think about it a bit. 
So what exactly is happening? The video is synched to the rotors to only show the frames with them in those positions?
look at the comments:
No I think this comment is more useful
:
edit: http://en.wikipedia.org/wiki/Wagon-wheel_effect
Last edited by rvec on Sun May 20, 2007 1:05 pm; edited 1 time in total
| Quote: |
| planes and helis are flying only because of magic!
just think how blowing air could make 100 tons of alluminium and titan move !! blades and engines only to cover the truth. magic is power! |
No I think this comment is more useful
:
| Quote: |
| Nice example of "Wagon-wheel effect" |
edit: http://en.wikipedia.org/wiki/Wagon-wheel_effect
Last edited by rvec on Sun May 20, 2007 1:05 pm; edited 1 time in total
Wow! At first I had no idea how the rotors appeared to be so still. Then I realised that they had to be moving, because you can hear them spinning.
I just read the first comment on each of the videos and it offers a pretty good explanation - correct me if it's wrong though.
The rotors are spinning so fast that they are not captured on every frame of the video properly. So they appear stationary. Interestingly, they appear stationary, which would seem to suggest that the rotors are doing one exact spin per frame of the camera filming.
| Agent ME wrote: |
| So what exactly is happening? The video is synched to the rotors to only show the frames with them in those positions? |
I just read the first comment on each of the videos and it offers a pretty good explanation - correct me if it's wrong though.
The rotors are spinning so fast that they are not captured on every frame of the video properly. So they appear stationary. Interestingly, they appear stationary, which would seem to suggest that the rotors are doing one exact spin per frame of the camera filming.
That's right, it either just happens to be or is purposely set up so that the frame rate of the camera matches the rotation of the helicopters rotor blades, giving the appearance they're not moving at all. Of course the camera may not be sync'd to each turn of the rotor, as all the rotor blades look the same of course... so as long as it's synced per blade, as opposed to a full revolution you'd still get the same effect. Not sure if I explained the right, but I tried.
I find it interesting that the vid stayed in sync throughout however, as I'm sure the rotor blades changed speed during the flight.
I find it interesting that the vid stayed in sync throughout however, as I'm sure the rotor blades changed speed during the flight.
Impressive stuff, good find.
First video is out of sync. You can tell cause throughout the video they make a very slow rotation.
That's pretty cool - thanks for sharing!!
| Jaan wrote: |
| First video is out of sync. You can tell cause throughout the video they make a very slow rotation. |
Yeah I saw that also. Another thing to note is that is may not be that hard to get the camera to sync considering helicopter rotors spin at a constant speed and only the pitch changes so right throughout the flight they are going at the same speed whether climbing or falling. So I guess getting a camera to sync up isn't that impossibly hard!
That's a cool effect they've managed there.
Perfect example of how eyes (or in this case camera) can play a trick on our mind. It's just an optical illusion I guess. Yeah, I would guess that the frame rate of the video is similar to the blade rotation. But it is a nice find on Youtube.
Good share
Good share
How VERY useless. You might want to post it in "funny pictures" (and video's) next time.
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