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Old 5th Sep 2003, 05:55   #1 (permalink)
 
Join Date: May 2003
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A320

Is thid true that tail is not deiced or antiiced on A320 ?
Why?
B.R
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Old 5th Sep 2003, 06:36   #2 (permalink)
moo
 
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not entirely sure about this, but I think the 747-400 has no anti-ice on the horizontal stab leading edge and I know the fin definately hasn't. can't say that I know an aircraft that has, but i'm happy to be corrected!
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Old 5th Sep 2003, 19:10   #3 (permalink)
 
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Yup, it's true........

Only the wing slats nos.3,4 & 5 (the outer 3) are de-iced with hot air. The rest of the airframe is "in shadow" and does not ice up !!

Anyway, that's what Airbus say


Roger Miller.
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Old 6th Sep 2003, 16:23   #4 (permalink)
 
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Yup, true...

I do not have too many hours on A320, but was "privileged" to make an approach in severe icing in ZRH about 2 years ago. After landing, the gear, and the non-deiced part of the wing looked like something out of "winter wonderland", but the tail was essentially ice-free..... so i guess Airbus must have got that one right...

By the way, on the subject of icing and the A320, there is quite a controversy about landing with Flaps 3 or 4 in icing conditions... Seem to remember that Flaps 3 with a speed increment made for sure-fire controllability with ice already built-up, but the shorter gap between the leading-edge slats and the wing in this configuration actually increased chances of build-up... Don't remember for sure if that was the gist of it, but it made for a few interesting bulletins at Swissair at the time... Maybe somebody current on the airplane could make a statement?
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Old 6th Sep 2003, 18:40   #5 (permalink)
 
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Thinks hard,

Nope, I'm sure there are exceptions but I can't remember any a/c that I have worked on which have a de-iced empanage.

The nearest I can think of is the (non UK certified) Beech King Airs, in which the outflow valve vented into the tailcone/empanage area, thus perhaps providing a modicum of warm air to keep the area ice free. However for uk certification a duct was installed venting the cabin air outside of the fuselage.
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Old 8th Sep 2003, 02:34   #6 (permalink)
m&v
 
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philosophy change between Boeing/Douglas..747/727 didn't have tail deicing-built the tail feathers larger tosupport the weight Doulas 8/9 both had emphatic tail deicing due smaller stab surfaces(press the tail deice button heated for 3?minutes)
Airbus studies dont require tail heat..
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Old 8th Sep 2003, 08:43   #7 (permalink)
 
Join Date: Sep 2001
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The C130J has a de-iced vertical fin - the deice boot is the black monstrosity at the vertical fin base - uses bleed air to inflate and deflate, thereby cracking the ice off in theory. The rest of the fin has bleed air anti-ice.
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Old 14th Sep 2003, 23:07   #8 (permalink)
 
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Its my understanding that only the MD-11 has a de-iced horizontal stabilizer - that is because our friends in Longbeach in their efforts to make the three-engine bird have the same economics as Boeing's big twins - did a relaxed stability, undersized horizontal stabilizer to reduce wetted-area drag in cruise. In order to re-cover the control authority - they use a nifty "vented" hinge - that acts like a split flap horizontal stablizer - to soup up the aerodynamics of this fin. The only problem is - that if the "vent" gets obstructed with ice - the control authority gained could be lost. SSSSSSSSSsssssssoooooooo, that added anti-ice to it ..Also, They got this big assed engine just up the stabilizer which provides a conveninet source of bleed air .. Would hate to have to plumb air from the wing root all the way back to for occasional de-icing ..They also have a fly-by-wire design so as to control the the relaxed stability design.
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Old 14th Sep 2003, 23:28   #9 (permalink)
 
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MD-11 fly-by-wire hmmm. Or are you refering to LSAS?.
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