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
The energy density of Jet fuel is massive vs energy density vs batteries.
Batteries can drive four simple low power motors. Jet fuel can drive a complex but powerful engine.
The fuel and weight drives the design decisions. Four small turbine engines would be a massive amount of complexity but also a lot of mechanical complexity .
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