Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

B744/-8 Speed selection

Tech Log The very best in practical technical discussion on the web

B744/-8 Speed selection

Old 22nd Oct 2015, 22:26
  #1 (permalink)  
Thread Starter
 
Join Date: Jun 2007
Location: HKG
Posts: 140
Likes: 0
Received 0 Likes on 0 Posts
B744/-8 Speed selection

Question guys, and if you can provide a reference (i.e. page in FCTM, etc) that would be great.

I am under the distinct impression that when configuring your flaps for landing (speed window open) that it is not necessary to wait for the called for flaps to reach that position (i.e. green line on display) before being allowed to reduce your speed to that flap setting on the AS indicator. Somewhere, I recall reading that Boeing has stipulated that adequate protection exists.

Any references out there?

Thanks!
ASH1111 is offline  
Old 22nd Oct 2015, 22:56
  #2 (permalink)  
 
Join Date: May 2000
Location: Seattle
Posts: 3,195
Likes: 0
Received 0 Likes on 0 Posts
If you're in 1 G flight, just keep your speed above the yellow arc (FCTM 1.11-1.12):
Flaps Down Amber Band
For all flaps-down operations (any time the flaps are not full-up) the minimum maneuver speed is the slowest speed that provides full maneuver capability, 1.3g or 40° of bank (25° of bank and 15° overshoot) to stick shaker. The top of the amber band does not vary with g load.
. . .

Minimum maneuver speeds (displayed as the top of the lower amber band) should not be confused with flap maneuver speeds. Flap maneuver speeds are based on airplane weight, while the minimum maneuver speed is calculated using airplane angle of attack and current airspeed. These speeds provide independent means to ensure that the current airspeed provides at least full maneuver capability for terminal-area maneuvering.
Intruder is offline  
Old 23rd Oct 2015, 18:17
  #3 (permalink)  
 
Join Date: Apr 2008
Location: Denver,Co USA
Age: 76
Posts: 333
Received 0 Likes on 0 Posts
What is a 744-8? I know of a 747-8 or a 747-400 called a 744.
Rick777 is offline  
Old 23rd Oct 2015, 21:21
  #4 (permalink)  
 
Join Date: Sep 2013
Location: Canada
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Rick, that was 744/-8, not 744-8.
I assume it meant "-400 or -8".
m39462 is offline  
Old 14th Nov 2015, 02:29
  #5 (permalink)  
 
Join Date: May 2000
Location: Seattle
Posts: 3,195
Likes: 0
Received 0 Likes on 0 Posts
Silberfuchs:
Any references out there?
Intruder is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.