All of the others talk of temperature rise do to compressibility based on
mach number, but no one really addressed the speed accounting for friction
of air molecules on the sheet metal which warms the aircraft. War story
time, low level over the plains of eastern Montana, near Conrad and Havre
Bomb Plots (Radar Bomb Scoring sites) and the outside air temp was
about -15F, however, we were moving along at about .88mach at 500ft AGL, and
the skin temperature was about 100F, not a worry about accumulating icing.

Some one else referred to "Speed of heat" as being Mach 1, because most
aircraft need after-burner or "heat" (reheat) as the Brits would say.. to
make Mach1. BTDT


BT

"vlado" wrote in message
ups.com...
Is there a rule of thumb for 'speed of heat'? Meaning the speed in
knots where ice will not form on the leading edges of a wing. For
example, the Saberliner had no de-ice or anti-ice system, just speeding
up would remove or prevent ice build up.
Thanks.