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Old 8th Nov 2016, 17:39
  #4 (permalink)  
Join Date: Jul 2000
Location: My views - Not my employer!
Posts: 987
When you flex, the performance computation will use the spare runway to achieve higher speed (think improved v2 climb) to get further reductions in flex temp.

When you use TOGA there isn't any point as there is ample performance for everyday use. Hence you simply get fast enough to takeoff and then do just that!

ps. Why your V1 is low on the TOGA case may be a company preference...
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