More 737-200 Questions :-) to pick brains again please

[PhoenixMalta]

Hi All ..

Need to pick brains again please regarding 737-200 descent procedure ..

Unless I am reading wrong, The FCTM (and other sources) appear to be contradictory..

They state ..
Descend at M0.74/250 Kts with Idle throttles at approx 2100 FPM (Clean)

would one use Rate of Descent to maintain M0.74 / 250 Kts using Idle Throttle ??

OR..

Would you Maintain -2100 FPM @ M0.74/250 Kts using a small amount of thrust ?

I'm in the process of creating a Classic 737-100/200 simulation and unless I have my drag figures all wrong one or the other above is neccassary at the moment.. do I have too much drag dialled in perhaps ?

Appreciation & Regards

[ajd1]

You descend at .74/250, which with idle thrust will give you about 2100fpm. Obviously this is approx as RoD will vary with mass, A/I on/off etc.

[Cough]

Particularly when you had to wind the N2 up with Eng AI on...