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Design Choices On A330/340  
User currently offlineskopsko From United States of America, joined Feb 2013, 26 posts, RR: 0
Posted (1 year 7 months 3 weeks 3 days 21 hours ago) and read 2146 times:

I've noticed two strange design choices on A330/340:

1. The different colored metal panels (white, gray, etc.) on the forks that holds the engines. It looks unfinished. This is not the case with Boeing planes whose forks are covered with one, congruent metal sheeting.
2. The part of the fuselage where the horizontal stabilizers attached also looks unfinished and has that row metal look. This is not the case on the A380, for example, or Boeing planes.

Does anybody know why?

1 replies: All unread, jump to last
 
User currently offlineAA737-823 From United States of America, joined Mar 2000, 5849 posts, RR: 11
Reply 1, posted (1 year 7 months 3 weeks 1 day 8 hours ago) and read 1838 times:

Quoting skopsko (Thread starter):
1. The different colored metal panels (white, gray, etc.) on the forks that holds the engines. It looks unfinished. This is not the case with Boeing planes whose forks are covered with one, congruent metal sheeting.

The objects which hold engines to wings are called "pylons," most of the time.
They are not all metal on the Airbus; the metal portions are unpainted, yes, but the composite portions are painted. Much as AA treats its planes- 737 fuselages are (until last week, anyway) unpainted, while the wing-body fairing and vertical stab (and lots of other bits and pieces) are painted.

Also, I think Airbus uses a hot pylon concept, while Boeing's is cool. Don't remember the details there, but I think I read something about it a while back.
Basically, Boeing puts the bleed air precooler in the engine case, so only "cool" air ducting is in the pylon, whereas Airbus supposedly puts the precooler in the pylon, creating a so-called "hot" pylon.
I don't know- I've never touched an A320/330/340 engine or pylon, I only work on Boeings.


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