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NASA has designed a type of electric stealth aircraft "Puffin" for single flight. It can take off vertically like a helicopter. It flies like a fixed-wing aircraft. This is the same as the "Osprey" used by the Marine Corps. Some are similar, but "Puffin" has a more unique place.
The "puffin" derives its power from the electric motor and therefore has a better mute effect than an ordinary airplane. Its noise is only 50 decibels at a flying height of 150 meters, which is the same as talking to ordinary people. It is quieter than current low-noise helicopters and its mute effect is 10 times that of them. At the same time, it is difficult to detect puffins because they use carbon fiber composites. These unique properties have made Puffin a potential special purpose.
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