Electric motors can also be stacked multiple motors to one shaft, a trick that has also been put to work to bond an electric motor to a gasoline engine to provi

Electric motors can also be stacked multiple motors to one shaft, a trick that has also been put to work to bond an electric motor to a gasoline engine to provide "boost" at takeoff. Existing gasoline single-prop engines typically have dual redundant ignition systems with segregated cylinders powering a unified driveshaft and camshaft, and I think your split inverter/motor/battery path is entirely in line with that approach to single-prop internal redundancy. It depends on the weight of the components, of course.