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-   -   Positive Rate (https://www.pprune.org/tech-log/633473-positive-rate.html)

vilas 9th Jul 2020 02:36


Originally Posted by hans brinker (Post 10832220)
Well, in their "defense", they had two working engines....
Also for what happens with just "changing the existing status", see the Karachi thread (IMHO).

Since they had Engines and they were not in panic possibly they would have noticed too low gear and gone around.

Uplinker 9th Jul 2020 09:15


Originally Posted by hoss (Post 10823106)
Keeping it simple and safe.

I know I use 3 things before opening my mouth to say positive rate and it all occurs in a couple of seconds.

SENSE: if I can hear T/O thrust and I can see the attitude passing through 12* I know that we are probably airborne.
and
INDICATION: check IVSI
and
CUE: my peripheral vision confirms for me the ground is getting further away.

”POSITIVE RATE”

My guess is that you are joking, but as pilots, we need to measure positive climb, not merely think it seems to happening.

Hearing the engines are at T/O thrust ???? Probably airborne ????

+12° pitch might not get you off the ground if you forgot the flaps, or your engines are not at T/O thrust, or your speed is too low.

Peripheral vision is not reliable at night, or in low vis, or at airports such as Luton, Leeds or Jersey and others which have steep drop-offs after the runway, so the ground will fall away but that does not mean you are climbing.

The whole point of the positive climb call is that it confirms, by measurement, not by assumption - that the aircraft is climbing.

IVSI indicating positive rate + RA increasing + Altimeter increasing = Aircraft is climbing :ok:

ScepticalOptomist 9th Jul 2020 22:36


Originally Posted by Uplinker (Post 10832752)
IVSI indicating positive rate + RA increasing + Altimeter increasing = Aircraft is climbing :ok:

This! Anyone who flies an airliner that does it differently should change career.

Everything else is a cue, the above quote is the confirmation.

nervous_novice 12th Jul 2020 17:01


Originally Posted by ScepticalOptomist (Post 10833364)
This! Anyone who flies an airliner that does it differently should change career.

Everything else is a cue, the above quote is the confirmation.

lols, yeah exactly!!


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