alphafloor
Posts: 1265
Joined: Tue Jun 08, 2004 12:36 am

Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 1:00 am

Hi !

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



Thanks !
-Al-
Whatever
 
futureuapilot
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 1:55 am

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!
 
avioniker
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 1:59 am

It's the pressurization outflow valve
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
 
XFSUgimpLB41X
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 2:35 am

Official name is the butterfly valve. As previously stated..it's a pressurization outflow valve.
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FlyingColours
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 2:35 am

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

Phil
FlyingColours
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alphafloor
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 5:55 am

Thanks for your answers !
...and is this outflow valve automatized or manually controlled on the DC-10 ?
Whatever
 
philhyde
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 6:23 am

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
Canon junkie - Aviation Nut
 
EMBQA
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 6:25 am

That is actually just a aerodynamic door. The valve is a little deeper inside.
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dc10hound
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 6:37 am

...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
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futureuapilot
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 7:09 am

Ok, sorry, i was wrong...  Innocent

-Sam
The Pilot is the highest form of life on Earth!
 
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HAWK21M
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 10:40 am

Def the Pressurisation Outflow valve Gate assy.
regds
MEL
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alphafloor
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 5:46 pm

Thanks everyone for your answers !
-Al-
Whatever
 
alphafloor
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 13, 2005 7:57 pm

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
 
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Bruce
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RE: Open Panel On The Port Side On The DC-10

Fri Jan 14, 2005 12:16 am

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
 
B747FE
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RE: Open Panel On The Port Side On The DC-10

Fri Jan 14, 2005 1:02 am

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"
 
TimT
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RE: Open Panel On The Port Side On The DC-10

Fri Jan 21, 2005 8:19 am

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.
 
nightflyer
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RE: Open Panel On The Port Side On The DC-10

Sat Jan 22, 2005 1:38 am

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
 
VC-10
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RE: Open Panel On The Port Side On The DC-10

Sat Jan 22, 2005 4:28 am



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]
 
alphafloor
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RE: Open Panel On The Port Side On The DC-10

Thu Jan 27, 2005 8:13 pm

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
 
Jetmech55
Posts: 5
Joined: Sun Jan 16, 2005 7:24 am

RE: Open Panel On The Port Side On The DC-10

Sat Jan 29, 2005 7:30 am

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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