Icing Airmets

"Mike Rapoport" wrote in message
ink.net...

"Bob Gardner" wrote in message
news:XKARb.132385$nt4.579289@attbi_s51...
Any time air is accelerated, as it is when passing over a small-radius
surface, its temperature drops...so it is entirely possible to accrete
ice
when the temp is above zero.
first...OAT guage, struts, lower edge of windscreen where there is a lip
rather than a flush surface, etc. That is also why tail feathers begin
to
accrete ice before the wing's leading edge does.

Bob Gardner


While small radius objects do collect ice better than larger redius
objects,
temperature drop has nothing to do with it. Small radius objects have a
higher "collection efficiency" meaning more of the droplets in their path
will impact the surface. They have a higher collection efficiency because
they don't project a "bow wave" as far in front of them as larger. You
NEED
supercooled water for airframe icing.

Not exactly. Small objects and small water lead to the best conditions,
from a statistical standpoint, for gathering ice.