Magic or Science?. This happens when a camera's shutter speed is synchronized with a helicopter's blade frequency. Or bad animation/ lag in games... Skippy. Magic or Science? This happens when a camera's shutter speed is synchronized with helicopter's blade frequency Or bad animation/ lag in games Skippy
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> hey anon, wanna give your opinion?
asd
User avatar #2 - kristovsky
Reply 0 123456789123345869
(10/30/2013) [-]
the blades were spinning too fast to be captured, obviously the camera has a pretty low frame rate.
User avatar #3 to #2 - mulk
Reply +3 123456789123345869
(10/30/2013) [-]
the shuuter speed is actually the same as the rotational speed of the blades. so the frame rate is acutally pretty good when you think about it
#6 to #3 - pwnmissilereborn **User deleted account**
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(10/30/2013) [-]
Actually, if I'm correct and that's a Mi-24 Hind it's main rotor should have a frequency of (it's an estimate, but the most I could find out in forums) 240 rpm.

240/60 = 4 revolutions per second
So if the frame rate is equal to the rotational speed that means that camera is filming at 4 frames per second, which is quite lame.

The tail rotor seems to be spinning slowly because it is spinning way faster than the main rotor (most likely somewhere in between 720rpm and 1440 rpm)
#8 to #6 - noxface
Reply 0 123456789123345869
(10/31/2013) [-]
You're confusing frame rate and shutter speed.

Frame rate is the amount of times the shutter opens in a second, the shutter speed is how long the shutter remains open for.

I haven't done the maths for this particular scenario but if you factor in both shutter speed and frame rate you will easily achieve 25fps while getting the "motionless" rotor blades.

This video shows it quite well, you can notice at 1/400th of a second when the wheel slows down and syncs with the shutter speed (frame rate remains same in both recordings) it appears to be motionless.
www.youtube.com/watch?v=lItCq5Gp6vw
User avatar #4 to #3 - kristovsky
Reply 0 123456789123345869
(10/30/2013) [-]
i jut assumed the blades were still because the frame rate wasnt high enough to allow movement to be captured? but im not an expert on cameras
#9 - thedevilsriddle
Reply 0 123456789123345869
(10/31/2013) [-]
Skippy.
User avatar #5 - karlthemarxist **User deleted account**
Reply 0 123456789123345869
(10/30/2013) [-]
Magic is science, just with out all the lies.
User avatar #1 - nynewars
Reply 0 123456789123345869
(10/30/2013) [-]
Well, if you're to believe what the religious say, then science is magic.
User avatar #7 - konysugandanbitch
Reply -1 123456789123345869
(10/30/2013) [-]
Or, OR, it's just falling from the sky because the main rotors don't ******* work.