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Old 7th Oct 2018, 23:30
  #1142 (permalink)  
john_tullamarine
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Balanced Field Length takeoff - a note

Probably as a result of pilot theory training courses, which tend to get a bit preoccupied with BFL operations, many pilots appear to hold the view that BFL is a bit sacrosanct. Nothing could be further from the truth. BFL calculations have the one advantage that they are the simplest (and, when done by the pilot, the quickest) way to run field length limited calculations.

While it is noted that some aircraft AFMs only provide data for BFL calculations or may not provide much flexibility for unbalanced calculations, where the option exists, it usually will give a better weight outcome if the calculation is run for an unbalanced situation.

Considering A37575's post, a nasty obstacle runway is a common example where unbalancing TODR and ASDR may provide a useful weight advantage. Note, I am not familiar with the runway cited so I am not able to offer specific comment regarding the data cited.
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