jush
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MD11CF Lights On The Front (pic)

Mon Dec 05, 2005 6:32 pm


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Photo © Luis Tena Orozco



Good morning!
I had a look at the Top of the last 24 hours and came along the picture you see above.
At the upper front end of the fuselage (below door 1R) you cann see a light (landing light?).
It seems to be extendable and retractable respectively. I'm not a technician so i don't know nothing about this particular plane but what happens if you activate the lights?
Do they retract to "shine" onto the runway? Or are they fixed in that position.
It really looks like they can retract into that little "hole" in the fuselage.
And if not i wonder how much drag are they "producing". i'd gues quite a lot.

BTW, it is a nice picture, isn't it? Look at the front wheel rising.

I appreciate any answers and hope you'll brighten me up cause i have no idea whatsoever.

Regds
jush
There is one problem with airbus. Though their products are engineering marvels they lack passion, completely.
 
pilotpip
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RE: MD11CF Lights On The Front (pic)

Mon Dec 05, 2005 6:41 pm

DC-10s also have these landing lights. They extend out from those holes. Between those and the lights on the gear they create a very distinctive lighting pattern that makes the aircraft type very obvious on approach. Quite a few aircraft have landing lights that work in a similiar fashion. DC-9s have landing lights on the outer portion of the wing that rotate down into position.
DMI
 
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HAWK21M
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RE: MD11CF Lights On The Front (pic)

Tue Dec 06, 2005 12:38 am

Its def a Landing light.
Switch activation Extends & illuminates Or Retracts & switches off.Dont want any unnecessary drag when its not being used  Smile
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
ArcticTern
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RE: MD11CF Lights On The Front (pic)

Tue Dec 06, 2005 1:30 am

I dont know much about these light, I think this is a splendid picture. Look at the nose wheel, it got me thinking.

One tyre withstanding the load of an aircraft.

About the light, on Flight simulator 2004, if you fly an Airbus 300 you can see similar action, they pop out when switched on and pop in when switched in.

Thanks,
Sushant
I wanted to fly even before I knew how to pronounce the word 'Pilot'
 
113312
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RE: MD11CF Lights On The Front (pic)

Tue Dec 06, 2005 3:04 am

THe switches actually have three positions. Retracted, Extend, and ON. Therefore, you have the option to extend the lights and leave the lamps off or turn them on when you like.

When extended, these lights do produce drag and noise from the disturbed airflow. You can actually hear the sound change, in the cockpit and forward cabin, when these are extended or retracted inflight.

The light on the nose gear has two filaments. One is for taxi and the other is another bright landing light. Combined with the two landing lights on the sides of the fuselage, excellent illumination of the runway is achieved.

Occasionally, the motors driving the extension mechanism will get stuck due to mechanical failure or frozen moisture. When this happens, you may see a landing light beam pointed in an unusual (and useless) direction!
 
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HAWK21M
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RE: MD11CF Lights On The Front (pic)

Tue Dec 06, 2005 11:02 pm

Quoting 113312 (Reply 4):
THe switches actually have three positions. Retracted, Extend, and ON. Therefore, you have the option to extend the lights and leave the lamps off or turn them on when you like.

I can understand the "Extend" posn on the Outboard Landing lights for the B737 classics as its mounted on a movable surface so needs to align with the runway surface depending on position to save time.
But why on this type.Why encounter drag if its not being switched on.
I would presume Retracted/Off & Extended/On.
Can you reconfirm why.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
CosmicCruiser
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RE: MD11CF Lights On The Front (pic)

Tue Dec 06, 2005 11:22 pm

Quoting HAWK21M (Reply 5):
But why on this type.Why encounter drag if its not being switched on.

The only situation that I ever see is sometimes extending the ldg. lights and leaving them off when sitting at the end of the runway waiting for t/o clearance. You're right in that there is no reason to have them extended and off in the air. I would also assumme that it's a nice maint. function to extend them and have them off....CC
 
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HAWK21M
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RE: MD11CF Lights On The Front (pic)

Tue Dec 06, 2005 11:59 pm

Quoting CosmicCruiser (Reply 6):

Any pic of the related sw assy in the Cockpit.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
PSAjet17
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RE: MD11CF Lights On The Front (pic)

Wed Dec 07, 2005 12:49 am

Here are two pics:
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Photo © Mark van Cuilenborg
View Large View Medium
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Photo © Jeroen Stroes



It looks like the positions are (1) RET, (2) EXT OFF and (3) EXT ON
 
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HAWK21M
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RE: MD11CF Lights On The Front (pic)

Wed Dec 07, 2005 1:25 am

Quoting PSAjet17 (Reply 8):

Interesting.
Thanks.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
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Starlionblue
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RE: MD11CF Lights On The Front (pic)

Thu Dec 08, 2005 8:39 am

Quoting Pilotpip (Reply 1):
DC-9s have landing lights on the outer portion of the wing that rotate down into position.



Quoting 113312 (Reply 4):

When extended, these lights do produce drag and noise from the disturbed airflow. You can actually hear the sound change, in the cockpit and forward cabin, when these are extended or retracted inflight.

When I jumpseated in a DC-9, the Captain told me to watch for the slight turbulence when the lights extended. If he hadn't told me, I would not have noticed. It's very slight but there.
"There are no stupid questions, but there are a lot of inquisitive idiots."
 
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HAWK21M
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RE: MD11CF Lights On The Front (pic)

Thu Dec 08, 2005 1:01 pm

Most of the later Aircraft models have instead of Flap track mounted Landing lights,they have fuselage mounted lights.
Any Current Flying models post 90s use the Wing mounted lights yet.
regds
MEL
I may not win often, but I damn well never lose!!! ;)

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