Quadrotor configuration I think is the most common configuration for drones. Why has it not been made into a full-size production aircraft? I think that it could be better than helicopters as it does not need a tail.
In: Engineering
Larger rotors are much more efficient, and therefore helicopters are much more efficient than multi rotors. Small drones are multi rotors because they’re much simpler mechanically, they don’t need swash plates and variable pitched blades, anti torque rotors, etc. So multi rotors make sense for small cheap drones. Also multi rotors are inherently unstable and need a flight controller to stabilize them, whereas helicopters are stable without a flight controller.
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