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Old 9th Nov 2010, 04:56
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Ellsworth
 
Join Date: Jun 2005
Location: Cairns
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A320 full back stick

Can anyone clarify this for me?

-IN NORMAL LAW
Valpha max = the top of the red stripe on speed tape, and it corresponds to the maximum pitch attainable in normal law with full back stick. It is therefore target speed during GPWS Pull-up maneuver.

Green dot speed = Best L/D ratio (ie BEST ANGLE of Climb Vx). Shows only in Clean Config.

Now, in cruise, obviously the Green Dot is well above the Valpha Max speed. They are two separate speeds. Which would mean if you pulled the stick fully back, the aircraft will NOT give you Vx. Is that Correct?

Then howcome in GPWS Pull-up warning (in which you want Vx, not Vy), the procedure is TOGA, stick fully back and let the speed drop all the way to Valpha max? Isn't that giving you less-than-maximum climb angle?

Thanks in advance
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