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Open Panel On The Port Side On The DC-10  
User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 39
Posted (9 years 8 months 1 week 6 days 19 hours ago) and read 6378 times:

Hi !

What is this open panel on the port side of a DC-10 ? Something related to the pressurization system ?



Thanks !
-Al-


Whatever
19 replies: All unread, jump to last
 
User currently offlineFutureUApilot From United States of America, joined May 2004, 1365 posts, RR: 4
Reply 1, posted (9 years 8 months 1 week 6 days 19 hours ago) and read 6171 times:

Well I don't know exactly, but I believe the pressurization outflow valve is located in the back of the aircraft on the underbelly. I have no clue what that hole is though...

-Sam



The Pilot is the highest form of life on Earth!
User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 2, posted (9 years 8 months 1 week 6 days 18 hours ago) and read 6165 times:

It's the pressurization outflow valve


One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently offlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4200 posts, RR: 37
Reply 3, posted (9 years 8 months 1 week 6 days 18 hours ago) and read 6122 times:

Official name is the butterfly valve. As previously stated..it's a pressurization outflow valve.


Chicks dig winglets.
User currently offlineFlyingColours From United Kingdom, joined Dec 2003, 2315 posts, RR: 10
Reply 4, posted (9 years 8 months 1 week 6 days 18 hours ago) and read 6126 times:

MDD Aircraft have their outflow valves on the starboard side just forward of the wing like that one.

Phil
FlyingColours



Lifes a train racing towards you, now you can either run away or grab a chair & a beer and watch it come - Phil
User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 39
Reply 5, posted (9 years 8 months 1 week 6 days 15 hours ago) and read 4951 times:

Thanks for your answers !
...and is this outflow valve automatized or manually controlled on the DC-10 ?



Whatever
User currently offlinePhilhyde From United States of America, joined Aug 2003, 678 posts, RR: 1
Reply 6, posted (9 years 8 months 1 week 6 days 14 hours ago) and read 4936 times:

This is a guess, but I would say (and hope) that the cabin pressure is adjusted by a computer, so I'll go with automated.

cheers,
Phil



HoustonSpotters Admin - Canon junkie - Aviation Nut
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 7, posted (9 years 8 months 1 week 6 days 14 hours ago) and read 4931 times:

That is actually just a aerodynamic door. The valve is a little deeper inside.


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineDc10hound From United States of America, joined Dec 2000, 463 posts, RR: 5
Reply 8, posted (9 years 8 months 1 week 6 days 14 hours ago) and read 4924 times:

...and is this outflow valve automatized or manually controlled on the DC-10 ?

There are three modes of operation for the DC-10 outflow valve:

Auto

Semi-Auto (Standby)

Manual



"Eagles soar. But weasels never get sucked into jet intakes.."
User currently offlineFutureUApilot From United States of America, joined May 2004, 1365 posts, RR: 4
Reply 9, posted (9 years 8 months 1 week 6 days 13 hours ago) and read 4910 times:

Ok, sorry, i was wrong...  Innocent

-Sam



The Pilot is the highest form of life on Earth!
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 10, posted (9 years 8 months 1 week 6 days 10 hours ago) and read 4862 times:

Def the Pressurisation Outflow valve Gate assy.
regds
MEL



Think of the brighter side!
User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 39
Reply 11, posted (9 years 8 months 1 week 6 days 3 hours ago) and read 4819 times:

Thanks everyone for your answers !
-Al-



Whatever
User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 39
Reply 12, posted (9 years 8 months 1 week 6 days 1 hour ago) and read 4808 times:

My understanding is that this outflow valve is regulating the DeltaP of the cabin pressurization, right ? My third question would be: is this outflow valve open sometimes during cruise ? I have always noticed this outlflow valve open while the a/c is on the ground and then closed before taxi.

-Al-



Whatever
User currently offlineBruce From United States of America, joined May 1999, 5057 posts, RR: 15
Reply 13, posted (9 years 8 months 1 week 5 days 20 hours ago) and read 4774 times:

Here is a picture that I uploaded many years ago.... (my 10th upload!) and it shows this valve on a DC9.


View Large View Medium
Click here for bigger photo!

Photo © Bruce Leibowitz




bruce



Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
User currently offlineB747FE From Hong Kong, joined Jun 2004, 230 posts, RR: 4
Reply 14, posted (9 years 8 months 1 week 5 days 19 hours ago) and read 4769 times:

The outflow valves are variable area units that control the rate of discharge of compartment air, and therefore Delta P. This valves are always modulating to maintain the cabin in the selected flight profile.


"Flying is more than a sport and more than a job; flying is pure passion and desire, which fill a lifetime"
User currently offlineTimT From United States of America, joined Jun 2001, 168 posts, RR: 0
Reply 15, posted (9 years 8 months 5 days 12 hours ago) and read 4646 times:

The outflow valve is the larger of the 2 doors in the photo and the smaller one is the thrust recovery valve on the DC-10 picture.

User currently offlineNightFlyer From United States of America, joined Sep 2001, 95 posts, RR: 3
Reply 16, posted (9 years 8 months 4 days 19 hours ago) and read 4594 times:

If you look at the MD10 outflow valve they changed it to the MD11 style. It's just a one piece panel. Just a little useless info for you.  Smile

NightFlyer


User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3701 posts, RR: 34
Reply 17, posted (9 years 8 months 4 days 16 hours ago) and read 4563 times:
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The Outflow Ram Air Shield, normally closed, is driven open during the TO roll, rotation & lading to deflect the airstream and create a low-pressure area over the Outflow Butterfly Valve.

The Butterfly Vlv controls the outflow of air at low flight altitudes.

The Thrust Recovery Vlv control air outflow at moderate to high flight altitudes.

[Edited 2005-01-21 20:34:04]

User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 39
Reply 18, posted (9 years 7 months 4 weeks 1 day ago) and read 4419 times:

Thanks everybody! Thanks VC-10 for the great diagram !! My old DC10 question has finally an answer... (a question I had since I was a kid !).

-Al-



Whatever
User currently offlineJetmech55 From United States of America, joined Jan 2005, 6 posts, RR: 0
Reply 19, posted (9 years 7 months 3 weeks 6 days 13 hours ago) and read 4338 times:

Alpafloor, as a side note the KC-10A doesn't have an outflow valve, it only has the thrust recovery valve. Also, it has 2 airconditioning packs versus the DC-10's 3 packs..

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