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An Explanation For These Engine Differences?  
User currently offlinejpmagero From United States of America, joined Apr 2012, 171 posts, RR: 0
Posted (1 year 10 months 5 days 18 hours ago) and read 4477 times:
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Hi - I'm curious - is there anything special about the differences in these engines, besides the visual difference? I apologize, I don't know the technical terms for that part.




John M - Aussie expat in the US
11 replies: All unread, jump to last
 
User currently offlineN243NW From United States of America, joined Jul 2003, 1624 posts, RR: 20
Reply 1, posted (1 year 10 months 5 days 17 hours ago) and read 4461 times:

Nope. The part I'm sure you're referring to is the spinner on the center of the fan. I'm not an engine expert, but different airlines have been known to use different designs for the spinner for various reasons. Many engines don't have anything painted on the spinner, as you can see from the above aircraft. Perhaps the two engines on this A330 were sourced from different overhaul facilities or airlines.


B-52s don't take off. They scare the ground away.
User currently offlinemy235 From United States of America, joined Mar 2009, 92 posts, RR: 0
Reply 2, posted (1 year 10 months 5 days 17 hours ago) and read 4457 times:

One spinner is painted and the other is not?

User currently offlineMarkC From United States of America, joined Apr 2006, 259 posts, RR: 0
Reply 3, posted (1 year 10 months 5 days 16 hours ago) and read 4438 times:

Even if the engines were sourced from different overhaulers, its the operator who provides the paint pattern, and it would be the same. I have overhauled spinner cones.

My two guesses:

One is a leased engine.

One is a new part that was replaced after a bird strike or something, and they did not have time to paint it.


User currently offlinejpmagero From United States of America, joined Apr 2012, 171 posts, RR: 0
Reply 4, posted (1 year 10 months 5 days 5 hours ago) and read 4369 times:
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Quoting my235 (Reply 2):
One spinner is painted and the other is not?

Wow...that's it... 

Yes, I guess I didn't state the obvious, except to say the "visual difference" thinking it was obvious.



John M - Aussie expat in the US
User currently offlineBoeingGuy From United States of America, joined Dec 2010, 2954 posts, RR: 7
Reply 5, posted (1 year 10 months 5 days 3 hours ago) and read 4369 times:

On the 777, at least, the painted spinner is an optional feature. I'm guessing it's the same for the A330. So as others indicated, for whatever reason, this airplane ended up with one engine with the optional paint and the other without.

User currently offlineMarkC From United States of America, joined Apr 2006, 259 posts, RR: 0
Reply 6, posted (1 year 10 months 4 days 20 hours ago) and read 4348 times:

FYI, there is no such thing as an unpainted spinner. They all have several coats of Laminar X-500 or equivalent paint. Some maybe pure white, and may seem unpainted. The actual color of the unpainted kevlar layers in the PW4000's is yellow. Not sure of other engines as I have not personally worked on them.

Mark


User currently offlineStitch From United States of America, joined Jul 2005, 30415 posts, RR: 84
Reply 7, posted (1 year 10 months 4 days 18 hours ago) and read 4304 times:
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Could the spinner on the starboard engine just not be visible because it's in shadow?

User currently offlinemy235 From United States of America, joined Mar 2009, 92 posts, RR: 0
Reply 8, posted (1 year 10 months 4 days 10 hours ago) and read 4231 times:

I like the spinners on most Lufthansa's 747's. It's all white with a black center circle with a black swoosh out of it like this:
Lufthansa 747 spinner


User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 9, posted (1 year 10 months 4 days 8 hours ago) and read 4195 times:

Quoting MarkC (Reply 3):
One is a new part that was replaced after a bird strike or something, and they did not have time to paint it.

Something similiar out hereon one Aircraft.....The Spinner was put on .... put the marking/paint was added on at a much later date timepermitting....



Think of the brighter side!
User currently offlinejpmagero From United States of America, joined Apr 2012, 171 posts, RR: 0
Reply 10, posted (1 year 9 months 4 weeks 21 hours ago) and read 3770 times:
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Quoting Stitch (Reply 7):
Could the spinner on the starboard engine just not be visible because it's in shadow?

no, there was no shadow, I got this at several angles in direct sunlight.



John M - Aussie expat in the US
User currently offlineAA737-823 From United States of America, joined Mar 2000, 5722 posts, RR: 11
Reply 11, posted (1 year 9 months 3 weeks 5 days 11 hours ago) and read 3499 times:

I change a lot of spinner cones.... sigh.
What most likely happened here is that they borrowed one from another carrier, or as someone stated above, one engine is leased.
I believe Swiss PW4000's used the white spinners... But LX was not alone in that.

The other one isn't unpainted, it's simply black.

Now, paint is NOT a requirement; when the paint falls off (which it invariably does), you can keep the spinner flying without it. You simply have to do a visual check for corrosion. But, that said, they all have paint when new or overhauled.


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