PPRuNe Forums - Boeing FMC MINVR (minimum rotation speed)

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RandomPerson8008

1st May 2020 06:46

Boeing FMC MINVR (minimum rotation speed)

Can anyone explain the reason for an FMC generated MINVR value following automatic uplink of performance data via ACARS?

I can speculate that it is VMC related - potentially VMCA protection, but I'm having trouble finding an explanation.

Apologies for the blurry photo, but leaning forward from behind the center pedestal to snap was a bit awkward.

Thanks.

https://cimg7.ibsrv.net/gimg/pprune....a243e2f806.jpg

https://cimg1.ibsrv.net/gimg/pprune....80d40847ce.jpg

turbidus

3rd May 2020 16:48

tailstrike protection?

RandomPerson8008

3rd May 2020 23:40

Quote:

Originally Posted by turbidus (Post 10771489)

tailstrike protection?

Could be. I'm wondering why the aerodata performance vendor didn't account for the minimum Vr in their numbers. The aircraft FMC overrode the vendor data, adding 4 knots to Vr.

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