Icing

loopa · Post by **loopa** » Tue Dec 22, 2009 6:41 am

I was reading this as I struggle to deal with jetlag, quite interesting.

http://www.aopa.org/asf/publications/sa11.pdf

Out of curiosity, why is the frost-looking texture on this wing not hazardous? We had it for about 6 hours and landed safely.

Cheers !

mathewc · Post by **mathewc** » Tue Dec 22, 2009 8:48 am

What kind of aircraft is that just out of curiosity?

CarbHeat · Post by **CarbHeat** » Tue Dec 22, 2009 8:49 am

A340?

loopa · Post by **loopa** » Tue Dec 22, 2009 9:02 am

This is an A340-313X with 43 seat configuration.

BingBong · Post by **BingBong** » Tue Dec 22, 2009 9:49 am

The thing with frost on wings in flight....the friction of the air moving over the wing should melt it off. Small little patches of frost on a wing won't bring the a/c down. That being said I'm not saying you should take off with frost on your wings...I'm pro clean wing concept.

loopa · Post by **loopa** » Tue Dec 22, 2009 10:07 am

leafy_13 wrote:The thing with frost on wings in flight....the friction of the air moving over the wing should melt it off. Small little patches of frost on a wing won't bring the a/c down. That being said I'm not saying you should take off with frost on your wings...I'm pro clean wing concept.

frost-looking texture

Of course it can't be "FROST" ... it just looks like it. When I took this pic the temp stated on the airshow was -66C ...

I just found it to be quite interesting, what ever it is that is on the wings.

YO_MAMMA · Post by **YO_MAMMA** » Tue Dec 22, 2009 11:10 am

Thats not frost over that wing...although it appears to look very similar to that. Sometimes it could be dried up de-icing fluid or over flow of gas when fueling the aircraft.

Pugster · Post by **Pugster** » Tue Dec 22, 2009 11:29 am

Once your speed gets up over 300kts you typically will start sublimating frost and ice off the wing. At higher flight levels I've heard ice can sublimate at a rate of 1mm per 10 minutes when operating clear of cloud (and this is not accounting for the ram effect heating on the wing...).

I'm not sure what that is on the wing though...maybe as suggested residual deice fluid that has dried on the wing? Just ugly paint? I'm not sure...

Read your blurb on the trip to the UAE...interesting stuff. Never been to the sandbox - may have to put it on the list of places to see...

niss · Post by **niss** » Tue Dec 22, 2009 11:39 am

loopa wrote: I just found it to be quite interesting, what ever it is that is on the wings.

I've seen lots of interesting things on wings. I just try to close my eyes and think calming thoughts.

BingBong · Post by **BingBong** » Tue Dec 22, 2009 12:41 pm

YO_MAMMA wrote:over flow of gas when fueling the aircraft.

You don't fill an A340 overwing........singlepoint my friends

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