We know that Philppe Starck has been putting his handiwork into watches as of late, but how about this gem of a clock that was designed way back in 1989? Now he puts his namesake on watches for Fossil and Richard Mille, but back in the 1980s he was still an aspiring artist and this propeller and fin based clock was designed for Alessi and is now a part of the Museum of Modern Art.
It has no backing, and just uses two fins or propellers to designate the given time. It may look like you could strap it onto the front of a turboprop plane, but I would highly recommend against that idea. Unless your turboprop happens to be a DeLorean capable of making time move fast enough to keep the propellers spinning.