| 摘要 |
An aircraft comprises two wings, a fuselage, a tail planform and a pair of counter-rotating propellers. The two wings are located at a longitudinal center of gravity of the aircraft. The fuselage is located forward of the longitudinal center of gravity and coupled to the two wings. The tail planform is coupled to the two wings and located aft of the longitudinal center of gravity. The pair of counter-rotating propellers are located at the longitudinal center of gravity and between the wings. Further, the pair are coupled to a tilting mechanism for tilting the propellers between a vertical flight position and a forward flight position. One of the propellers located beneath the wings when in the vertical flight position and one of the propellers is located above the wings when in the vertical flight position.
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