| 摘要 |
1,203,979. Convertible aircraft. BOEING CO. 5 Dec., 1967 [30 Dec., 1966], No. 55364/67. Headings B7G and B7W. An aircraft 10 has aerofoil section, a fuselage 11, wings 12, a transverse axis within the aerofoil section, about which is tiltable a propulsion assembly 16, with respect to the wing, the tiltable propulsion assembly comprising a frame 25 supporting power means 17, a fluid coupling 19 and a transmission 18 to a propeller having blades 24. The blade pitch may be varied both cyclically and collectively. The frames 25 may be pivoted about brackets 26 by actuators acting between a rear wing spar 49 and pivots 44 on the frames; the actuators may comprise electric motors 46 driving a screw jack 43, 45, one actuator being mounted beside each frame 25. The actuators 15 and 43, 45 may be hydraulic actuators. The propellers 23 are synchronized by a shaft 60 connected via gear-boxes 62 with shafts 63 in the transmissions 18. |
