B737-300 Non-Normal landing speed query
In the B737 FCTM page 6.8 there is reference to bug settings for non-normal landings. It states:
"For non-normal landings, position two white rerefence bugs at VREF and single white reference bugs at the flap 5 maneuvering speed and the flap up maneuvre speed".
So, if for example you are doing an all-flaps up landing what is the reason for setting a reference bug at the flap 5 maneuvre speed?
Also at Non-Normal page 6.9, referring to all flaps up landing final approach, Boeing state "Engines will be at low idle speed due no flap extension...when engines are near idle rpm, time required for engines to accelerate is longer than normal".
However, when reading Boeing Volume 1 (Engines, APU, Engine System Description), under sub-heading Idle RPM, it states that the minimum engine speed for all flight phases is high idle. There is nothing about the idle RPM being affected by flap non-use.
Seems contradictory to me. Any answers, please?