| 摘要 |
1304194 Turbofan powered STOL aircraft McDONNELL DOUGLAS CORP 28 April 1970 [12 Jan 1970] 20471/70 Heading B7G In an STOL aircraft, a turbo-fan engine 22 is mounted forwardly and downwardly with respect to a wing 12, on a pylon 50 such that the efflux from the fan 64 passes between the bottom 52 of the wing and the efflux from the engine turbine to provide a heat shield, and is also caused to flow over the top of the wing by a controlling flap 26 or slot 28 whereby induced lift is created. In addition the wing is provided with a main flap 36 for deflecting the engine flux downwardly to create reaction lift. The exact degree of lift required for different opera. tions is adjusted by a spoiler 40, flap vane 60 and main flap 36. A drag flap 34 is also provided to control glide slope. Limits are quoted for the exact positioning of the engine primary exit 46 with respect to the wing. All control surfaces are actuated by an hydraulic system, Fig. 6 (not shown). A thrust reverser 62 may be provided to deflect fan air downwardly through opening 66 to reduce tail load. Boundary layer control may be used to augment aircraft control.
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