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

B747 takeoff distance

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

B747 takeoff distance

Old 24th Aug 2019, 14:58
  #1 (permalink)  
Thread Starter
 
Join Date: Aug 2019
Location: Monterrey
Posts: 7
B747 takeoff distance

Hi everyone,

Since I donít have a B-747 performance manual, can anyone Tell me what Would be te takeoff distance for a flap 10ļ and 20ļ setting please?

Airport elevation ...2,100 Ft
Temp......................15ļc
Altimeter ..............30.20
Wind.......................calm
Runway grad..........0%
Runway dry
TOW......................300,000 Kg
TOGA

Thanks

Santiago60 is offline  
Old 1st Oct 2019, 04:31
  #2 (permalink)  
 
Join Date: Oct 2000
Location: CYXY YT, Whitehorse Canada
Posts: 71
maybe easier with the name of the airport.
phil@LFPG is offline  
Old 1st Oct 2019, 12:54
  #3 (permalink)  
Thread Starter
 
Join Date: Aug 2019
Location: Monterrey
Posts: 7
Thank you [email protected]

It coluld be any airport , although I know is not the same. Letís try Tenerife (GCXO). I will apreciate your help.

Regards

Santiago60 is offline  
Old 2nd Oct 2019, 02:09
  #4 (permalink)  
 
Join Date: Oct 2000
Location: CYXY YT, Whitehorse Canada
Posts: 71
clear your inbox if you want some infos ...
phil@LFPG is offline  
Old 5th Oct 2019, 22:01
  #5 (permalink)  
 
Join Date: Feb 2002
Location: D(Emona)
Age: 39
Posts: 379
GCXO 12, TODA 3171m. Same for both flaps 10 and 20.
Data from Boeing OPT, CF6-80C2B1F
Dufo is offline  
Old 5th Oct 2019, 22:35
  #6 (permalink)  
Thread Starter
 
Join Date: Aug 2019
Location: Monterrey
Posts: 7
B-747

Thanks so much Duffo,

How about the Takeoff run from runway 30? In other words, as you well know, the distance from brakes off until main wheels leave the ground? I bet that you may get about 200-300ft less ground distance if using flaps 20. That is my guess.

Iíll appreciate your response.

Best regards
Santiago60 is offline  
Old 6th Oct 2019, 09:11
  #7 (permalink)  
 
Join Date: Feb 2002
Location: D(Emona)
Age: 39
Posts: 379
R30, Flaps 20, All engines go 2988m, engine out go 3023m, toda same 3171m.
Flaps 10 AE-go 3094m, EO-go 3128m.
Dufo is offline  
Old 6th Oct 2019, 09:40
  #8 (permalink)  
 
Join Date: Mar 2014
Location: australia
Age: 76
Posts: 173
Magadi airport el 2100 ft
GXCO is only 170m
harrryw is offline  
Old 6th Oct 2019, 12:31
  #9 (permalink)  
Thread Starter
 
Join Date: Aug 2019
Location: Monterrey
Posts: 7
B-747

Dufo:

You nail it!

Once again, thank you very much! You canít imagine how long I was waiting for this response.

My suspicios were correct...with flaps 20, the ground run is 347 ft shorter than using flaps 10.

********************************************************
Harryw,

If I understand correctly, the GCXO (Los Rodeos airport) has an elevation of 633 m , 2077 ft. Correct me If Iím wrong.

Thank you
Santiago60 is offline  
Old 6th Oct 2019, 13:51
  #10 (permalink)  
 
Join Date: Mar 2014
Location: australia
Age: 76
Posts: 173
Originally Posted by Santiago60 View Post
Dufo:

You nail it!

Once again, thank you very much! You canít imagine how long I was waiting for this response.

My suspicios were correct...with flaps 20, the ground run is 347 ft shorter than using flaps 10.

********************************************************
Harryw,

If I understand correctly, the GCXO (Los Rodeos airport) has an elevation of 633 m , 2077 ft. Correct me If Iím wrong.

Thank you
(IATA: TFS, ICAO: GCTS), also known as Tenerife SouthĖReina SofŪa Airport[ is the main airport of tenerriffe
You are correct though for the other
harrryw is offline  
Old 6th Oct 2019, 16:23
  #11 (permalink)  
Thread Starter
 
Join Date: Aug 2019
Location: Monterrey
Posts: 7
B-747

Thank you harryw,

Cheers
Santiago60 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 © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.