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KC-135 Tail Marking?  
User currently offlineUltimateDelta From United States of America, joined Sep 2007, 2122 posts, RR: 6
Posted (1 year 1 month 2 weeks 10 hours ago) and read 4733 times:

This is a fairly simple question and I haven't been able to find anything answering it yet: What was backwards-L-shaped marking on the port side of the vertical stabilizer on every C-135 variant? And furthermore, why did it disappear when the AMC gray paint scheme was introduced? It seems to appear on the natural, light gray, and lizard green schemes, regardless of model. Thanks for any information you've got!

This is what I'm referring to:

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Photo © leon witts




Midwest Airlines- 1984-2010
8 replies: All unread, jump to last
 
User currently offlinevenus6971 From United States of America, joined Dec 2004, 1443 posts, RR: 0
Reply 1, posted (1 year 1 month 2 weeks 9 hours ago) and read 4678 times:

That used to be the area when we swung the vertical stab to remove the rudder on its side to provide a safe area to walk without damaging structure. There was one also on the top of the horizontal stabs.


I would help you but it is not in the contract
User currently offlineboeingfixer From Canada, joined Jul 2005, 531 posts, RR: 0
Reply 2, posted (1 year 1 month 1 week 6 days 4 hours ago) and read 4629 times:

To add a bit more information to what venus6971 posted,.

Quoting UltimateDelta (Thread starter):
What was backwards-L-shaped marking on the port side of the vertical stabilizer on every C-135 variant?

These were markings indicating the safe to walk zone on the vertical stab while it was folded. The folding stab was designed into the C-135 due to existing production and maintenance facilities not having high enough hangars to fit the aircraft with the vertical stab, well, vertical.

This is nothing new to Boeing. The B-50, C-97/377, B-52 and B707/720 also had fins that could be folded for maintenance purposes.

Quoting UltimateDelta (Thread starter):
And furthermore, why did it disappear when the AMC gray paint scheme was introduced?

The only thing I can figure is that the fin was folded so rarely that the markings were irrelevant for normal maintenance purposes.

Cheers,

John



Cheers, John YYC
User currently offlinezanl188 From United States of America, joined Oct 2006, 3522 posts, RR: 0
Reply 3, posted (1 year 1 month 1 week 6 days 4 hours ago) and read 4629 times:
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Good thread. I always wondered what that marking was for. I even thought it looked like a "no step" marking but then thought "no, couldn't be" lol.

Would the vert fold on its own or was there additional hardware required?

Fin fold pix:

https://www.facebook.com/22ARW#!/photo.php?fbid=629067210437912&set=pb.136045629740075.-2207520000.1375746993.&type=3&theater

[Edited 2013-08-05 16:59:11]


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User currently offlinerc135x From , joined Dec 1969, posts, RR:
Reply 4, posted (1 year 1 month 1 week 6 days 1 hour ago) and read 4629 times:

Quoting boeingfixer (Reply 2):
The only thing I can figure is that the fin was folded so rarely that the markings were irrelevant for normal maintenance purposes.

Correct.


User currently offlineRevelation From United States of America, joined Feb 2005, 12556 posts, RR: 25
Reply 5, posted (1 year 1 month 1 week 5 days 16 hours ago) and read 4289 times:

Quoting zanl188 (Reply 3):
Fin fold pix:

https://www.facebook.com/22ARW#!/photo.php?fbid=629067210437912&set=pb.136045629740075.-2207520000.1375746993.&type=3&theater

Thanks - a picture's worth a thousand words!  



Inspiration, move me brightly!
User currently offlineUltimateDelta From United States of America, joined Sep 2007, 2122 posts, RR: 6
Reply 6, posted (1 year 1 month 1 week 5 days 7 hours ago) and read 4200 times:

Quoting boeingfixer (Reply 2):
The only thing I can figure is that the fin was folded so rarely that the markings were irrelevant for normal maintenance purposes.

Makes sense.

Thanks so much for the info, everyone- you learn something new every day!



Midwest Airlines- 1984-2010
User currently offlinewindy95 From United States of America, joined Dec 2008, 2725 posts, RR: 8
Reply 7, posted (1 year 1 month 1 week 4 days 3 hours ago) and read 4046 times:

Quoting zanl188 (Reply 3):
Would the vert fold on its own or was there additional hardware required?

Support equiptment required.



OMG-Obama Must Go
User currently offlineFSXJunkie From United States of America, joined Oct 2012, 71 posts, RR: 0
Reply 8, posted (1 year 1 month 21 hours ago) and read 3534 times:

Quoting boeingfixer (Reply 2):
The only thing I can figure is that the fin was folded so rarely that the markings were irrelevant for normal maintenance purposes.

And AMC is not as anal about maintenance as SAC was, defacto rarity + longer rotation period between checks.


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