but it would be much better if we knew exactly what ROC a Ryanair 738 wanted out of Manchester etc
I think you may misunderstand what pilots want. We don't want a
rate of climb, we want to fly our ECON (economy) profile in VNAV, unrestricted all the way up to cruise level. That is our ideal profile for economy and comfort.
This results in a varying rate of climb throughout the profile. The higher we get the less the rate becomes as we run out of puff (that's a layman's terms
) until we just about make it to our ideal cruise level!
So, from take-off we climb fairly steeply until we reach flap retraction altitude, then we reduce our rate of climb and accelerate to clean speed. We then tend to keep accelerating (depending on terrain etc) to 250kts. Once at 250kts we then raise the nose to keep that speed and thus our ROC increases again. If we are released from speed control, or failing that as we pass 10,000ft, we again lower the nose (and hence ROC) to accelerate again, this time to our ECON climb speed, which we want to hold all the way up to our ECON cruise level.
Many, many factors will affect what ROC we achieve during this whole process, from temperature to headwind/ tailwind, a/c weight, MEL restrictions etc etc.
So we don't have a ROC that we could ask you for that would be ideal.
Hope this helps.
PP
ps. relieved to find out what the subject of the thread referred to! I was getting a little worried.
