Sunday, September 12, 2010 5:15:25 PM
I believe it's to do with how terrible phone cameras are - they record a part of the image at a time and work downwards, therefore for each frame they record different parts of the image at slightly different times. This just happens to be the effect a rotating blade forms.
Thursday, September 9, 2010 2:53:41 PM
remember, modern cameras can only record are around 25fps, so if the propellor if rotating at higher than 25 revs per sec, this video is only showing part of the rotating action, thus this effect :)