Back to the BUSS.
Below FL250 on descent you switch off all ADR's
Idle descent pitch will be around zero to stay in the green.
All Config changes are recommended to be done in level flight wings level.
We all know or should know approx pitch attitudes to hold level while configuring,,,,,,yes around 5 up give or take.
Setup 5 up and stay in the Green as you configure. Try to hold a fairly constant Pitch and take flaps as the green moves up the screen to keep it in the middle.....
Config 3 attained, hold pitch and add thrust hold it in the green until GS intercept ( hopefully you achieved Flap 3 as you intercepted the GS so you don't need to fly level too far ) then pitch down a little to keep on the GS and at the same time reduce Thrust to around 49% to stay in the green zone. The base figures should be pitch 4.9 thrust 49% N1. Vary the pitch to maintain the GS and thrust to keep in the green.
Down the slope, keep Pitch stable to hold the GS and adjust Thrust to stay in the Green
Land, kiss ground and complete tons of paperwork.
Simple
Works well that way, if you try to vary the pitch up and down AND change the thrust it gets complicated way fast!!
Still, you need to know approx Pitch attitudes to set to kick things off.
With regards to your comments regarding Non BUSS Aircraft, I believe you misunderstand the intent
QRH says--
FLYING TECHNIQUE TO STABILIZE SPEED: Adjust pitch in order to fly the required flight path. When target pitch is reached, flying intended flight path, adjust thrust to target. If the aircraft pitch tends to increase, aircraft is slow, then increase thrust; If the aircraft pitch tends to decrease, aircraft is fast
You set a Target Pitch and then see what happens, if the Pitch moves then ADJUST THRUST because it's either too much or too little to achieve the CORRECT IAS.
Therefore same as the BUSS, Pitch is the base line and your primary target, Thrust is then used to adjust to stabilized flight path ( and therefore IAS ) for what you are trying to do.
Indeed on Approach Flap 3 it's exactly the same, setup the required Pitch of 4.9 deg adjusting as required to keep the GS and set 49% N1 which should get the speed correct ( comparing IRS/GPS GS and tower winds to approximate the IAS ) remembering that you have a good margin in Flap 3 between VLS and VFE Flap 3 limit to stay inside. ( about 40 kt split )
Last edited by nitpicker330; 28th Mar 2014 at 10:13.