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Even in this, fixed wing drones are better. Only place where such helicopter drones work is in counter insurgency where there is a need to take off and land quickly without runways.

Choppers are inefficient in fuel usage and less maneuverable than fixed wing aircrafts. So, it can never be a full success over other drones which USA already has

The B2 is no longer stealthy. Its large size of 170tons makes it easy to be spotted with modern radars. With advancing semiconductor, the radar Technology has improved massively. The B2 was stealth till 1990s but the semiconductor revolution of 1990s ensured that the radars of 2000s were much...