On Tuesday, February 11, 2020 at 4:33:26 AM UTC-8, Martin Gregorie wrote:

..The one thing we both missed, though is that a good brushless motor plus
its controller will be a lighter and smaller than the equivalent ICE
piston engine driving a propeller...

Not only that, but it delivers smoother power with less vibration, delivers it the moment it is started, requires less service infrastructure (starting, lubrication, cooling, exhaust, etc), and can easily be positioned for stowage. It runs cleaner and cooler and more predictably under a wider range of conditions, and is more easily monitored for performance and troubleshooting.

--Bob K.