Re: Deicing

Date:         26 Jan 98 01:46:40 
From: (C. Marin Faure)
Organization: NorthWest Nexus Inc.
References:   1 2
Followups:    1
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The other day I asked the pilot of the BA 747 why they de-iced an airplane
that was accumulating new snow prior to leaving the gate, as I thought the
snow would simply blow off when the plane accelerated for takeoff.  He
said whether or not they de-ice new snow is dependent upon the temperature
of the wing with its load of fuel.  If the wing is warmer than the air,
which it often is, the snow will melt and then the water will freeze on
the wing when the plane begins to move.  If the wing is the same
temperature as the air, the snow will just lie there and will, indeed,
blow off when the plane starts to move.  In these cases, they don't need
to de-ice the plane.

C. Marin Faure
  author, Flying A Floatplane