Comment A bird carying a grenade? (Score 1) 325
For one, commercial quad-copters are a lot larger than the average bird unless you are talking about a giant eagle.
Second, if the drone is powered by a LiON battery pack and gets sucked into the engine, when the drone is struck by the impeller it COULD rupture the battery pack in a way that causes a small explosion. I don't know if this would be enough to damage the engine but I certainly would not dismiss it.