Hybrid electric flight is a perfect fit for military UAV's. It enables longer flight times, with lighter loads due to higher efficiencies, maybe at reduced vibr

Hybrid electric flight is a perfect fit for military UAV's. It enables longer flight times, with lighter loads due to higher efficiencies, maybe at reduced vibration(which can be a problem for imaging and reliability) due to better engine design(because of the smaller design range), and at critical times when total silence is needed , the UAV can run only on electricity and be quiet and almost without vibration. And it won't be surprising to learn that some militaries already have such systems in use.