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Coryb

B737-NG Calculation of vref

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Could anybody explain to me where to find the tables defining weight/flap setting/vref speed.I looked in the Landing performance manual (the obvious place??) but it does not appear there. Be glad of guidance.Thanks,Brian(Brian Corley)

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The FMC calculates that for you. Just take a look at the APPR PAGE.

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Thanks for your suggestion Fred. I am aware that the fmc will calculate all speed figures but whilst `v` speeds can be found in table format in the Take off performance manual the same does not appear to be the case for the landing case ie. vref.The question arose when I was working through the excellent tutorial by Timothy Metzinger, which specificaly covers flight without the benefit of the fmc. Good fun and very useful to hone the thinking process.Brian Corley(Cheltenham, England)

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The following figures are from a 737-700 Operations Manual.VREF SpeedsWeight FLAPS(1000 LB) 15 30 40170 159 153 151160 155 149 147150 150 144 142140 145 140 137130 139 134 132120 133 129 126110 127 123 120100 121 117 11490 115 111 108Flap Maneuver SpeedsFLAP POSITION MANEUVER SPEEDUP VREF40+701 VREF40+502 VREF40+405 VREF40+3010 VREF40+3015 VREF40+2025 VREF40+10Cheers,Bert

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