Hello all... I've never flown turboprops or jets (for real or in flight simulators) and I'm having a hard time setting a (Carenado) King Air C90 for approach (FS2004, but my question is really about "real" flying). Basically, I can't get the thing to slow down... I ease the throttle on level flight (cruising at around 170 KIAS), and start trimming for descent at 160 KIAS, aiming for 1500 fpm descent as per a C90 performance reference manual that I got on the internet (PDF). The manual has a descent chart (fuel/time/distance) defaulting to 169 KIAS / 1500 fpm. Yet, no matter how much I pull back the throttle, at that descent rate the plane speed goes over 180 KIAS (overspeed at certain altitudes). Moreover, if I ease the throttle too much, I start getting "low oil pressure" warnings, so I'm at a loss at how to maintain 169 KIAS at a 1500 fpm descent rate without damaging the engine (?)... I've tried fiddling with the propellers' RPM (2000 - 1700), to no avail... Any advice about the proper procedure to slow down turboprops (or the C90 in particular) for approach greatly appreciated...!
P.S. In another forum (reddit) someone suggested getting "flaps down". I was going to write an annoyed reply saying that if I was trying to slow down from cruise speed, the speed obviously would be much higher than Vfe... Yet, before I replied, I wisely googled up what was the Vfe for the C90, and apparently it is 184 KIAS (!!) for flaps set to "approach"... So, are flaps down set to "approach" the way to slow down the C90 to its reported 169 KIAS descent speed and keep 1500 fpm...? Thanks in advance for your advise and help on this!
