This is very, very wrong. The drone weighs 200 kg and travels at about 50m/s. Let's say in a dive it could reach 100m/s (it can't but let's pretend it does). That would be 1MJ of kenetic energy total. C4 has about 1.5MJ of energy per kg. There's about 30-50 kg of explosives total. The kenetic energy is absolutely dwarfed by the explosive energy. And every kg of engine you have is a kg of explosive you don't have.