A Warp Drive Propeller mounted to a Rotax 582 two stroke aircraft engine on a Quad City Challenger II seen at the Carleton Place, Ontario, Canada, Fly-in.
<a href="//commons.wikimedia.org/wiki/User:Ahunt" title="User:Ahunt">Ahunt</a>
<span class="int-own-work" lang="en">Own work</span>