“This could be some sort of trick with models or computers, but it looks like the shutter speed of the camera matches the rotation speed of the blades perfectly, making a nice optical illusion effect.”
First photo was taken with camera, from the inside of the flying plane. There are propeller blades that appear to be floating, and that appear in a path that is outside the normal path of the propeller. Now on to the second photo. Johnny Vulkan, the artist on Flickr, took the following photo of a Jet propeller. Is it only me, or does it seem to rotate? Look carefully, and try enlarging it to get better effect.
Today’s magic trick is also neat one. It is a video of impossible card dealing. Go check it, after you finished looking at these propellers.