Search found 12 matches

by AFROBINSON808
Thu Jun 11, 2020 5:35 pm
Forum: Technical/Operations
Topic: Engines on KLM 747 classics
Replies: 2
Views: 817

Engines on KLM 747 classics

Hi all, As most of us are probably aware, all B747 variants from the 747-200 thru the 747-400 series could accept either of three different powerplants: Pratt & Whitney JT9D (or PW4000 on the 744 series), GE CF6 or Rolls Royce RB211, the latter apparently for Commonwealth and European customers....

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by AFROBINSON808
Tue May 26, 2020 3:02 pm
Forum: Technical/Operations
Topic: 747-400 elevator control system
Replies: 14
Views: 2354

Re: 747-400 elevator control system

747classic wrote:
Standarization of horizontal stabilizer production to -400 standard, with provisions for tail tank installation, requiring re-routing of hydraulic lines.


Do you mean to say there that some 747 classics had the horizontal stabilizer tank?

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by AFROBINSON808
Wed May 20, 2020 7:09 pm
Forum: Technical/Operations
Topic: 747-400 elevator control system
Replies: 14
Views: 2354

747-400 elevator control system

Hi all,

I've read on a pprune.org forum that the B747-400 had a revised elevator control system compared to earlier 747 variants.

Does anyone have any illustrations/drawings/etc. of the 744's elevator system?

Thanks

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by AFROBINSON808
Mon May 11, 2020 5:31 pm
Forum: Technical/Operations
Topic: 747-400 with non-FADEC engines?
Replies: 13
Views: 1816

Re: 747-400 with non-FADEC engines?

mxaxai wrote:
You would probably need to use an old non-FADEC engine like those used on the 747-100/-200/-300.

What are you saying there?

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by AFROBINSON808
Mon May 11, 2020 12:13 pm
Forum: Technical/Operations
Topic: 747-400 with non-FADEC engines?
Replies: 13
Views: 1816

747-400 with non-FADEC engines?

Hi,

I am wondering if an aircraft normally powered by FADEC engines (namely, the 747-400) can be fitted with non-FADEC engines if no other engines are available.

Does anyone know if this is feasible?

Thanks

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by AFROBINSON808
Fri May 08, 2020 2:36 pm
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

Re: 747-400 horizontal stabilizer tank question

Two new questions regarding the 747 stabilizer tank:

1) What specific changes were made to the tail assembly to accomodate the tank?
2) On stock 747-400's operating without the stabilizer tank, is the entire tank removed, or just the outboard sections of the tank?

Thanks

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by AFROBINSON808
Wed May 06, 2020 6:27 pm
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

Re: 747-400 horizontal stabilizer tank question

SAAFNAV wrote:
What does the tank weigh? Same as the wing.


That's with the tank empty, right?

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by AFROBINSON808
Wed May 06, 2020 3:52 pm
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

Re: 747-400 horizontal stabilizer tank question

All the 747-400 series horizontal stabilizers are identical. Only on the 747-400,-400ER and -400M you can optionally have a part of the horizontal stabilizer sealed and used as a tail fuel tank. The added weight will be the weight of the installed sealant. Only the piping, fuel valves and the vent ...

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by AFROBINSON808
Wed May 06, 2020 3:18 pm
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

Re: 747-400 horizontal stabilizer tank question

747classic wrote:
The added weight will be the weight of the installed sealant.


Do you have any pictures of the sealant?

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by AFROBINSON808
Wed May 06, 2020 12:03 pm
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

Re: 747-400 horizontal stabilizer tank question

Does anyone know how much the tank weighs in pounds (lbs)?

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by AFROBINSON808
Wed May 06, 2020 10:03 am
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

Re: 747-400 horizontal stabilizer tank question

LH707330 wrote:
Not much, really. It's just a sealed interspar region with a few bits of plumbing.

Do you know how much it weighs in pounds (lb)?

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by AFROBINSON808
Wed May 06, 2020 12:27 am
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3211

747-400 horizontal stabilizer tank question

Hi,

Does anyone know how much the B747-400's horizontal stabilizer tank weighs when empty?

Thanks

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