I would guess that the range of such a device would be horribly short. The smaller the aircraft, the worse the range, in general, and the smaller a gas turbine,

I would guess that the range of such a device would be horribly short. The smaller the aircraft, the worse the range, in general, and the smaller a gas turbine, the worse its efficiency. Those should combine to give a truly awful range, but surprisingly somehow enough to be useful in this situation.