Bird or Plane. It's Brilliant

[wheel_nut]

uk.cars.yahoo.com/30062010/36/t/ … ity-0.html

[tachograph]

Brilliant is right

There’s more information here.

And here’s a video

http://www.youtube.com/watch?v=aeQL-dUjlOg&feature=player_embedded#!

[manowar]

Very clever.