Interesting fact I wasn't aware of is that there is no physical connection (i.e. no shaft) from the engine to the prop. The efflux from the turbine exhaust spins an impeller connected to the prop. Very efficient apparently and results in up to 50lbs of thrust just from a 60 size engine. Also sounds amazing.

Here's another flight I caught. Very late afternoon. Almost dusk. But showed off the light system to maximum affect.