There are radio controlled model airplanes that use a rotary engine[0] (which is in the same spirit of the Wave disk engine). The problem with this rotary engin

There are radio controlled model airplanes that use a rotary engine[0] (which is in the same spirit of the Wave disk engine). The problem with this rotary engine is that it uses an alcohol-based fuel[1]. I could see someone adventurous enough trying out this mini-rotary in a drone. It would be highly expensive, and difficult to tune, but ultimately fun. [0]http://www.osengines.com/engines-airplane/osmg1401/ http://www.osengines.com/engines-airplane/osmg1401/ [1]http://rcvehicles.about.com/od/nitro/f/nitrofuel.htm http://rcvehicles.about.com/od/nitro/f/nitrofuel.htm