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Old 5th Jun 2014, 17:16
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de facto
 
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Your chosen (optimized V1 ) will be between a MIN V1 limited by VMCG and a MAX V1 limited by runway lengh,brake energy limit...
In summary,

• Range of V1 can be used to optimize both performance and takeoff safety.

• Within the allowable V1 Range, all Federal Aviation Regulations related to Maximum Takeoff Gross Weight, Field Length Limits, are satisfied.

• V1 within the allowable range can be chosen to maximize margins on either Go or Stop.

• Statistical evidence from RTO accidents and incidents might lead us to consider a Reduced V1 Policy.
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