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The Accelerated Stall

机译:加速失速

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摘要

The accelerated stall usually surprises a pilot because it occurs at a higher airspeed than a normal stall (in which a wing loading of 1 G is maintained). Remember, a wing can be made to stall at any speed-all that has to happen is for the angle of attack to get high enough. As G-loading increases, so does stall speed. If a wing reaches its critical angle of attack when the wing loading is 2 G, twice normal, the stall will occur at a speed that's proportional to the square root of the wing loading. The square root of 2 is approximately 1.41, so the stalling speed at 2 G will be 1.41 times what it would be under 1 G conditions. Accelerated stalls are often caused by abrupt or excessive control inputs made during steep turns or pull-ups. If you're in a dive and pull back with enough suddenness and force to load the airplane to a typical design load factor of 3.8 G's, you'll enter an accelerated stall if the airspeed drops below 1.95 times the stall speed at 1 G loading (the square root of 3.8 is approximately 1.95).
机译:加速失速通常使飞行员感到惊讶,因为它的空速比正常失速(保持机翼载荷为1 G)高。请记住,可以使机翼以任何速度失速-所要做的就是使迎角足够高。随着重载增加,失速速度也增加。如果机翼载荷为2 G(正常情况下的两倍)时机翼达到其临界迎角,则失速将以与机翼载荷的平方根成比例的速度发生。 2的平方根约为1.41,因此2 G时的堵转速度将是1 G条件下的堵转速度的1.41倍。加速失速通常是由急转弯或上拉时突然或过多的控制输入引起的。如果您在潜水中突然突然向后拉并用力将飞机加载到3.8 G的典型设计负载系数,则当空速降至1G负载下的失速速度的1.95倍以下时,您将进入加速失速状态(3.8的平方根约为1.95)。

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  • 来源
    《Plane & pilot》 |2008年第8期|94-96|共3页
  • 作者

    PETER KATZ;

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  • 正文语种 eng
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