If I asked you to expedite, what sort of climb rate could you expect to achieve in say a 737 or 757 at levels between FL 100 and FL300?
How long is a piece of string. Depends hugely on the flavour of 737, the loading, the speed we had at the start, and finally any wind gradients.
Anything between about 1,500 and 6-7000 fpm.
I fly 300,400 and 500.
Lightly loaded 300 at one extreme versus full -500 at the other. Add an unfavourable wind gradient and the latter may struggle even more.
CPB