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CC-117: Thing In The Roof  
User currently offlinetravelavnut From Netherlands, joined May 2010, 1587 posts, RR: 7
Posted (3 years 1 month 3 weeks 3 days ago) and read 4727 times:

Sorry for the cryptic title, but I didn't know how else to describe it  

In the picture below of a Canadian C-17 there is something strapped to the ceiling;


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Photo © Matthew Lee - Contrails Aviation Photography



Can anybody tell me what it is? My first idea was maybe a raft or something similar, but it doesn't look like the right size. Also in an emergency I can't really see this being deployed very rapidly.

So, anybody?  


Live From Amsterdam!
4 replies: All unread, jump to last
 
User currently offlineN901WA From United States of America, joined Oct 2009, 453 posts, RR: 0
Reply 1, posted (3 years 1 month 3 weeks 3 days ago) and read 4715 times:

I might be wrong, but if I remember right. Its the outside of the Center Wing Fuel Tank Fuel Shroud. Its a liner with a drain to catch any fuel that might leak from the center wing tank from leaking into the Cabin. HTH

User currently offlinecargotanker From United States of America, joined Oct 2009, 152 posts, RR: 1
Reply 2, posted (3 years 1 month 3 weeks 2 days 22 hours ago) and read 4633 times:

Quoting N901WA (Reply 1):
I might be wrong, but if I remember right. Its the outside of the Center Wing Fuel Tank Fuel Shroud. Its a liner with a drain to catch any fuel that might leak from the center wing tank from leaking into the Cabin. HTH

Bingo. The straps are absent on the earlier non-ER models. The shape mirrors that of the wing box.


User currently offlinetravelavnut From Netherlands, joined May 2010, 1587 posts, RR: 7
Reply 3, posted (3 years 1 month 3 weeks 2 days 21 hours ago) and read 4605 times:

Quoting cargotanker (Reply 2):
Quoting N901WA (Reply 1):
I might be wrong, but if I remember right. Its the outside of the Center Wing Fuel Tank Fuel Shroud. Its a liner with a drain to catch any fuel that might leak from the center wing tank from leaking into the Cabin. HTH

Bingo. The straps are absent on the earlier non-ER models. The shape mirrors that of the wing box.



Thanks guys! Following A.net tradition the correct answer was light-years away from what I was thinking initially 


So do all high-wing aircraft have this "feature"? Like the C-13/C-5?



Live From Amsterdam!
User currently offlineZANL188 From United States of America, joined Oct 2006, 3503 posts, RR: 0
Reply 4, posted (3 years 1 month 3 weeks 2 days 11 hours ago) and read 4357 times:
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Quoting travelavnut (Reply 3):
So do all high-wing aircraft have this "feature"? Like the C-13/C-5?

Readily visible in the C-130:


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Photo © André Alves



In the C-5, however, the wingbox is above the cargo compartment and does not intersect it. It does seperate the troop compartment from the flight deck however.



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