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VSI readings incorrect

crosscheck9 Guest

In the posky V4 767, I was flying gulf air from gatwick to bahrain. The autopilot read that it was climbing at VSR of 2200 fpm, but the VSI indicated a climb of 2000 fpm. How do I know which one is right, and how do I fix the problem

Pro Member Captain
Sam (SamIntel) Captain

crosscheck9 wrote:

In the posky V4 767, I was flying gulf air from gatwick to bahrain. The autopilot read that it was climbing at VSR of 2200 fpm, but the VSI indicated a climb of 2000 fpm. How do I know which one is right, and how do I fix the problem

2200 FPM is what the auto pilot was set for. Your airplane was climbing at 2000 FPM. The aircraft could not get that much climb out of it. Only problem that I see is that a 767 should be able to do 2000 FPM easy. I think. But anyway, your VSI should be correct.
If i'm wrong please correct me.

crosscheck9 Guest

well, during my climb, I later reduced to 2000 fpm, and it read 1800 fpm, so I don't think that it would have diffculty acheiving that kind of rate of climb.

Pro Member Chief Captain
Jonathan (99jolegg) Chief Captain

I'm not familiar with the aircraft but if its a mistake a way of finding out which one is correct then check which one reads zero on the ground. 😉

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