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Old 12th November 2010 | 14:00
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Niseko Pow
 
Joined: Nov 2010
Posts: 4
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From: amsterdam
777 maneuvring speed logic

Hello ladies & gents,

coming from a stone-age a/c, the 777 MMS (minimum maneuver speeds) logic got me confused. A 2 yr old thread about this didn't answer all my of questions so here we go:

Acc to our FCOM the top of the yellow bar on the PFD speedtape indicates minimum maneurving speed (below 20000' etc).
This MMS guarantees 1.3g man. capability to stick margin, which equals 40 degree bank capability in level flight.

-Clear so far-

Additionally, the flap maneuvering speeds are indicated by the green flap indications next to the speedtape, used for flaps retr./ext. reference. This also makes sense, but acc. our FCTM "full maneuvring capability or at least 40 degr bank is provided when the a/c has reached the recommended maneuver speed"

Now; if both minimum speeds provide the 40degr/full maneuver capability, where's the difference?

For instance: what margin does the green "20" give me with flaps 20 selected, if the yellow bar (MMS) already provides 1.3g?


btw not a newbie on pprune, just no clue where my old account is, forgive me
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