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Open Panel On The Port Side On The DC-10

Alphafloor From Chile, joined Jun 2004, 1277 posts, RR: 44
Posted (8 years 5 months 1 week 1 day 4 hours ago) and read 5577 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

FutureUApilot From United States of America, joined May 2004, 1365 posts, RR: 4
Reply 1, posted (8 years 5 months 1 week 1 day 3 hours ago) and read 5370 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!

Avioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 2, posted (8 years 5 months 1 week 1 day 3 hours ago) and read 5364 times:

It's the pressurization outflow valve

One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533

XFSUgimpLB41X From United States of America, joined Aug 2000, 3996 posts, RR: 36
Reply 3, posted (8 years 5 months 1 week 1 day 3 hours ago) and read 5321 times:

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

Chicks dig winglets.

FlyingColours From United Kingdom, joined Dec 2003, 2315 posts, RR: 11
Reply 4, posted (8 years 5 months 1 week 1 day 3 hours ago) and read 5325 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

Alphafloor From Chile, joined Jun 2004, 1277 posts, RR: 44
Reply 5, posted (8 years 5 months 1 week 23 hours ago) and read 4150 times:

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

Whatever

Philhyde From United States of America, joined Aug 2003, 674 posts, RR: 1
Reply 6, posted (8 years 5 months 1 week 23 hours ago) and read 4135 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

EMBQA From United States of America, joined Oct 2003, 9292 posts, RR: 13
Reply 7, posted (8 years 5 months 1 week 23 hours ago) and read 4130 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"

Dc10hound From United States of America, joined Dec 2000, 463 posts, RR: 6
Reply 8, posted (8 years 5 months 1 week 23 hours ago) and read 4123 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.."

FutureUApilot From United States of America, joined May 2004, 1365 posts, RR: 4
Reply 9, posted (8 years 5 months 1 week 22 hours ago) and read 4109 times:

Ok, sorry, i was wrong... Innocent

-Sam

The Pilot is the highest form of life on Earth!

HAWK21M From India, joined Jan 2001, 31228 posts, RR: 58
Reply 10, posted (8 years 5 months 1 week 19 hours ago) and read 4061 times:

Def the Pressurisation Outflow valve Gate assy.
regds
MEL

Think of the brighter side!

Alphafloor From Chile, joined Jun 2004, 1277 posts, RR: 44
Reply 11, posted (8 years 5 months 1 week 11 hours ago) and read 4018 times:

Thanks everyone for your answers !
-Al-

Whatever

Alphafloor From Chile, joined Jun 2004, 1277 posts, RR: 44
Reply 12, posted (8 years 5 months 1 week 9 hours ago) and read 4007 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

Bruce From United States of America, joined May 1999, 5027 posts, RR: 17
Reply 13, posted (8 years 5 months 1 week 5 hours ago) and read 3973 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

B747FE From Hong Kong, joined Jun 2004, 230 posts, RR: 3
Reply 14, posted (8 years 5 months 1 week 4 hours ago) and read 3968 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"

TimT From United States of America, joined Jun 2001, 168 posts, RR: 0
Reply 15, posted (8 years 4 months 4 weeks 1 day 21 hours ago) and read 3845 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.

NightFlyer From United States of America, joined Sep 2001, 95 posts, RR: 3
Reply 16, posted (8 years 4 months 4 weeks 1 day 4 hours ago) and read 3793 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

VC-10 From United Kingdom, joined Oct 1999, 3677 posts, RR: 37
Reply 17, posted (8 years 4 months 4 weeks 1 day 1 hour ago) and read 3762 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]

Alphafloor From Chile, joined Jun 2004, 1277 posts, RR: 44
Reply 18, posted (8 years 4 months 3 weeks 2 days 9 hours ago) and read 3618 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

Jetmech55 From United States of America, joined Jan 2005, 6 posts, RR: 0
Reply 19, posted (8 years 4 months 3 weeks 22 hours ago) and read 3537 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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