Not surprising, the electric motor has some fairly high quality energy flowing in but the gas motor has to act as a heat engine as well, converting localized he

Not surprising, the electric motor has some fairly high quality energy flowing in but the gas motor has to act as a heat engine as well, converting localized heat into higher quality energy as it goes. That means a comparison of power densities between electric and internal combustion motors aren't entirely fair. But it also means that electrical motors have a big advantage in that it's a lot easier to add more of them. It looks like aircraft with many propellers along the length of the wing might have real advantages over single propellor aircraft and that's only something that's practical with electric motors.