| 摘要 |
<p>1,083,267. Aircraft trailing edge flaps. POWER JETS (RESEARCH & DEVELOPMENT) Ltd. Dec. 13, 1965 [Dec. 11, 1964], No. 50618/64. Heading B7G. [Also in Division F2] An aircraft wing trailing edge blown flap has a discontinuity in its surface to promote separation, and means are provided for shielding the discontinuity from the flow over the flap. The flap 2 described may have in its nose a notch 5 which is covered by the wing shroud until the flap is lowered to more than, say, 60 degrees; or a passage (6, Fig. 3, not shown), leading from the nose to the lower surface, which is normally closed by the wing shroud; or a step (9, Fig. 4, not shown) below which the nose is cut away to form a passage through which air can flow from the lower to the upper surface when the flap is lowered sufficiently; or a spoiler plate may be pivotally mounted on the flap nose and spring biased to extend away from the flap surface when it is not constrained by the shroud. The discontinuity is intended to produce an increase in drag and reduction in lift after landing or aborted take-off. The aircraft may be a jet flap aircraft.</p> |
