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Shelling the Air Snares

机译：炮击空中网罗

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摘要

You know the flap track fairings on Boeings? The ones that are about the size of Ercoupes? You have to wonder what's going on in there. A tennis match? They remind me of the huge spats that Northrop put on the landing gears of some of its airplanes back in the '30s. At a certain point, you'd think a fairing that big would produce just as much drag as the thing that it encloses. At what point? That was the question that hung in the air when I set out to make fairings for the flap tracks of my homebuilt. For more than two years I had flown with the tracks exposed, and I always wondered how much performance I was losing to them. It's hard to estimate. Compared to the complete airplane they're small; but as flap tracks go they're pretty big, because the Fowler flaps roll all the way to the trailing edge of the wing before deflecting 30 degrees. The tracks are irregularly shaped, sharpedged, and tilted 10 degrees to the air stream (because they're mounted at a right angle to the rear spar, which angles forward). They look as though they must be about as draggy as an object of their size possibly could be.
机译：您知道波音公司的襟翼轨道整流罩吗？那些大概和Ercoupes差不多？您必须想知道那里发生了什么。网球比赛？他们使我想起了诺斯罗普30年代在其某些飞机的起落架上撞上的巨大斑点。在某个时候，您会认为，如此大的整流罩会产生与其所包围的东西一样多的阻力。在什么时候？当我开始为自己的房屋的襟翼轨道做整流罩时，这就是悬而未决的问题。两年多来，我一直在飞奔的轨道上奔跑，而我一直想知道我会失去多少性能。很难估计。与完整的飞机相比，它们很小。但是随着襟翼轨迹的变大，它们的体积很大，因为Fowler襟翼在偏转30度之前一直滚动到机翼的后缘。履带的形状不规则，锐化并且与气流成10度倾斜（因为它们以与后翼梁成直角的方式安装，后翼梁向前倾斜）。它们看起来好像必须像其大小的物体一样拖累。

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  • 来源
    《Flying》 |2005年第9期|p.93-95|共3页
  • 作者

    Peter Garrison;

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  • 正文语种 eng
  • 中图分类 航空;
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