how to use OPT ALT in Boeing 777
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how to use OPT ALT in Boeing 777
OPT ALT is determined based on aircraft gross weight and cruise speed in still air. I am confused why BOEING put this in CRZ page, we determine the CRZ alt by using the MAX(-1000ft) or REC alt (within forecast and temperatures)
how to use OPT ALT during operation or be compared with something or to prove something?
new beginning at B777~
how to use OPT ALT during operation or be compared with something or to prove something?
new beginning at B777~
767 B12. So for simple me, OPT is where the wing is working best, REC overlays that with input winds.
OPT – displays the most economical altitude based on airplane gross weight.
MAX – displays the maximum cruise altitude based on:
OPT – displays the most economical altitude based on airplane gross weight.
MAX – displays the maximum cruise altitude based on:
- engine out operation
- selected speed option
- without any altitude or speed constraints, and
- capable of a 100 feet per minute climb rate.