Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Contrail-like Vapor Trail From Fuselage  
User currently offlineChrisPerkins From Switzerland, joined May 2006, 13 posts, RR: 0
Posted (3 years 1 month 2 weeks 1 day 1 hour ago) and read 2578 times:

Hi Everyone,

Flying 2'000ft below an Airbus A330 (FL390) on the same routing I noticed a contrail-like vapor trail forming behind the fuselage. It was only very faint, so not visible from the earth's surface, and it only formed for a few seconds, then vanished, only to reappear roughly a minute later or so.

The reason for this mini fuselage-trail remains unclear to me, yet I have 2 theories:

1) Water released from the fuselage. The origin of the water? Don't think that water drained through galley sink would form a visible trail. So maybe condensation water from the Air Conditioning unit? But why would it only appear on intervalls and not constantly? And it would probably not be that much water released either...

2) Air relesased from fuselage. Maybe also through A/C unit - warm (cabin temperature) air would be humid and at high pressure compared to outside air, so would rapidly expand and maybe form fuselage-trail. Altough, as far as I am aware, this release of air happens constantly so no explanation for the intervall phenomenon.

Didn't mean to mislead you with my theories - maybe the reason is something else?
...who has the correct answer?

Thanks for your comments!
Best regards,
Chris

5 replies: All unread, jump to last
 
User currently offlinecotparampguy From United States of America, joined Jul 2008, 224 posts, RR: 0
Reply 1, posted (3 years 1 month 2 weeks 1 day ago) and read 2551 times:

I believe what you saw was water coming out of the drain mast. There are pictures on the internet (even on here) of that happening. You'd be surprised how much water they dump out of there.

User currently offlineChrisPerkins From Switzerland, joined May 2006, 13 posts, RR: 0
Reply 2, posted (3 years 1 month 2 weeks 18 hours ago) and read 2478 times:

So where does that water come from?

User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 3, posted (3 years 1 month 2 weeks 16 hours ago) and read 2431 times:

Quoting ChrisPerkins (Thread starter):
1) Water released from the fuselage. The origin of the water? Don't think that water drained through galley sink would form a visible trail.

I second cotparampguy that it's probably drain mast water...that's intermittent and would appear to come off the back of the fuselage (the drain mast only goes about a foot away from the fuselage).

Quoting ChrisPerkins (Reply 2):
So where does that water come from?

Sinks...galley & lav. Some types also have bilge drain valves, but I'm not sure how that's implemented on the A330.

Tom.


User currently offlinegatorman96 From United States of America, joined Dec 2005, 852 posts, RR: 0
Reply 4, posted (3 years 1 month 1 week 6 days 13 hours ago) and read 2180 times:

Here is an example...

http://www.airliners.net/photo/US-Airways/Airbus-A330-323X/0280375/L/



Cha brro
User currently offlineFly2HMO From , joined Dec 1969, posts, RR:
Reply 5, posted (3 years 1 month 1 week 6 days 13 hours ago) and read 2163 times:

I hear that when you see a brown streak behind the galley drain masts on the fuselage it's mainly due to coffee being dumped and sticking to the fuselage.

Top Of Page
Forum Index

Reply To This Topic Contrail-like Vapor Trail From Fuselage
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Contrail From The Rear Of The A320 posted Thu Jul 29 2004 18:59:13 by Yousef727
Numbers On 737 Fuselage Being Shipped By Train posted Tue Mar 1 2011 22:10:51 by intsim
Aircraft Wings/ Fuselage Footprint Comparisons posted Mon Feb 14 2011 08:45:36 by flyboy80
Boeing 737 Fuselage Sheets posted Fri Jan 7 2011 15:46:24 by airbusb0y
Fuselage Mounted Engines And FOD Related Damage posted Thu Dec 23 2010 23:46:33 by CplKlinger
Clear Ice In My Yard, From An Airplane? posted Sun Dec 12 2010 07:03:52 by rampart
Contrail Differences posted Fri Nov 5 2010 18:46:12 by jcavinato
Extend A Fuselage? posted Fri Oct 29 2010 06:40:25 by Poadrim
Which Is Stronger, Fuselage Or Egg? posted Tue Oct 26 2010 02:42:04 by faro
Stretch DC-8 Fuselage Flex posted Sun Oct 24 2010 07:42:42 by happy-flier

Sponsor Message:
Printer friendly format