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The trouble with tab data

机译：标签页数据的麻烦

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摘要

PILOTS WHO HAVE BEEN out of initial training for some time often fall into patterns and habits not squarely in line with how they were trained to operate their aircraft. Day in and day out, though, these workarounds and shortcuts function just fine without negative repercussions, and so they become entrenched. Performance calculations become a broadly truncated discipline in which simplified work flows may appear adequate on the surface, all the while exposing the pilot to unseen hazards. Habitual use of the airplane flight manual (AFM) tabulated performance data (tab data) for takeoff and landing could omit critical considerations. Use of performance tab data is recognized as a compromise solution that trades speed and convenience for precise calculations. For conservatism's sake the pilot is directed to round up variables to the next higher category on the chart; often this is not an issue, as light jets typically require far less runway than exists at any decent-size general aviation airport (especially for dry runway operations). If the pilot has to round 22 degrees Celsius up to 25 degrees Celsius, and a pressure altitude of 400 feet to 1,000 feet, the extra 100 to 200 feet required just won't matter when taking off from a 5,000- or 6,000-foot-long runway, as the margins are so large. Because of this, pilots can become acclimated to using tabulated takeoff data-and forget the limitations that become critical when the aircraft's performance demands are closer to the actual runway length.

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  • 来源
    《AOPA Pilot》 |2021年第6期|T.6-T.8|共3页
  • 作者

    NEIL SINGER;

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