Don't know if that is engineering or art; probably both....
Would it be feasible for that plant to be adapted for flight?
Depends on the weight and power output. I'd hazard a guess that it's probably fairly heavy. Also it looks to me like he is using bushings in most places instead of ball bearings, so I don't know how well it would hold up to high power outputs or long term use.
Anyone know what fuel he's using? I don't see glow or spark plugs.... maybe some kind of diesel?