The helicopter is sized to take off from within submarines using existing openings; of necessity, it is large enough to hold only two passengers. Note that this is a design only; no prototype exists.
Waterspout would also float on the water even in rough seas; it would have enough fuel to fly 260 kilometers at a time. The small submarine-based helicopter would make use of stealth technology; it is designed with low heat emissions and special coatings to make it harder to spot with radar.
The Pennsylvania team was responsible for the aerodynamics of the rotors and the fuel system; the Technion team planned the rotor mechanics, the blade-folding mechanism, and the takeoff mechanism.
The model won first prize in the first-degree student category in a helicopter planning competition organized by the American Helicopter Society.
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