UltimateDelta From United States of America, joined Sep 2007, 2132 posts, RR: 6 Posted (1 year 1 month 3 weeks 6 days 23 hours ago) and read 4856 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!
venus6971 From United States of America, joined Dec 2004, 1443 posts, RR: 0
Reply 1, posted (1 year 1 month 3 weeks 6 days 21 hours ago) and read 4801 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.
boeingfixer From Canada, joined Jul 2005, 534 posts, RR: 0
Reply 2, posted (1 year 1 month 3 weeks 5 days 16 hours ago) and read 4752 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.