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Old 2nd Mar 2008, 00:20
  #16 (permalink)  
Chris Scott
 
Join Date: Jan 2008
Location: Blighty (Nth. Downs)
Age: 77
Posts: 2,107
Received 4 Likes on 4 Posts
Minimum GS on windshear approaches

Quote from Down Three Greens:
3,000ft wind in the region of 290/50kts but steady. Wind correctly shown as around 280/25G38-42 at touchdown and on instantaneous ND W/V readout. IAS Speed variation -5+10kts.
[Unquote]

Presume GS-MINI (managed speed) was in use? How do you like it? In my experience, new guys (on the A320) used to be very suspicious of it until they got used to it. Also - on the FMC PERF page - they would often insert a higher wind strength than the mean wind reported by the tower, in the mistaken belief this would give them more fat above VLS, to allow for wind shear. [In fact, of course, the reverse is the case, because it results in a lower minimum GS, even though the "managed" IAS is higher.]

Excuse me for appearing to go off-topic, but would be interested to hear your experience of this last night. The B747, of course, does not have (automatic) GS-Mini.

Chris
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