PPRuNe Forums - View Single Post - Vref + X and Vtgt Question. DH8 pilots anyone?
Old 5th Nov 2016, 03:15
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levashov
 
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Originally Posted by Tu.114
Of course, the LDA requirements need to be minded when increasing speeds. An increment of 10kts will increase required distance by 14%; 20kts will increase the LDR by 25% on top of all other factors. So speed increments are always subject to careful selection and very much dependent on the general situation.
Thank you for your answer. What turboprop do you fly?
What confusing me most, is that if we increase Vref for more than 10kts, but less then 20, how is it agree with "stabilised approach" requirenments, when pilots should avoid any speed deviations of more than 10kts from Vapp? (Because Vref is the speed at 50ft before touchdown, thus we have to wash out that additional wind correction adjactives, and if so, losing those Vapp to Vref would bust stabilised approach).
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