Originally Posted by
VegassBus
If you are at at 5,000 ft and Doing 250 and told to "slow to 200 and descent and maintain 2000, turn HDG blah blah. In Open descent it won't really start coming down until the speed is back. Why not dial in -1,000ft and spin the airspeed to 200? It will immediately go to idle and almost immediately start the descent as opposed to the lethargic open descent and roll speed back method.
Depends on how quickly ATC expects you to slow. At 1000 fpm I wouldn't expect the airplane to slow that quickly when clean. Open Descent generally descends at least 500 fpm and slows at the same time...which is exactly what ATC asked for. Yes, delaying compliance with an ATC speed adsignment by using V/S might help your descent rate, but I would rather just timely comply with clearances and use speed brakes when necessary.