Location of Ice Shield and Heat Shield in Relation to Fuel Lines on Boeing 777

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Discussion Overview

The discussion focuses on the location of the ice shield and heat shield in relation to the fuel lines on a Boeing 777, exploring aspects of aircraft design and engine configuration.

Discussion Character

  • Technical explanation, Conceptual clarification

Main Points Raised

  • One participant notes that fuel tanks are located in the wings and must connect through pylons to the engines, prompting questions about the positioning of fuel lines in relation to the combustor.
  • Another participant mentions that high bypass engines utilize the bypass and engine nacelle as heat shields between the combustor, turbine, and exhaust, providing insight into engine design.
  • There is a query about whether the Boeing 777 is equipped with Rolls-Royce or GE90 engines, with a clarification that the aircraft can have both types, specifically noting that British Airways Flight 038 was fitted with Rolls-Royce engines.
  • A participant adds that airlines or aircraft owners purchase engines separately from the aircraft, which are then installed by Boeing.

Areas of Agreement / Disagreement

Participants appear to agree on the general layout of fuel tanks and engine configurations, but there are multiple competing views regarding the specific engine types and their implications for the design.

Contextual Notes

There are unresolved details regarding the exact positioning of the ice shield and heat shield relative to the fuel lines, as well as the specific configurations of different engine types.

Who May Find This Useful

Aerospace engineers, aviation enthusiasts, and individuals interested in aircraft design and engineering may find this discussion relevant.

samsam
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Where are the in relation to the fuel lines on a Boeing 777
 
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Tanks are in the wing, and they must drop through the pylons (engine supports) to the engine. So the question would be where are the fuel lines in the engine, at least with respect to the combustor.

High by-pass engines have the bypass and engine nacelle to act as heat shields between combustor/turbine and exhaust.

This will give some idea of the inner workings of the engine.
http://www.geaviation.com/education/engines101/index.html

I think FredGarvin and others in the aerospace industry can provide better information.
 
Last edited by a moderator:
Thanks for that, was it fitted with RR donks or GE90s?
 
samsam said:
Thanks for that, was it fitted with RR donks or GE90s?
The 777 has both RR and GE90. In the case of BA038, the engines were RR.

AFAIK, the airline or aircaft owner purchases the engines separately from the aircraft and they are shipped to Boeing where they are installed.
 
Cheers thankyou very much for your help Sir, i might need more.
 

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