Are car or aeroplane outside temperature measures subject to wind chill?

  • 1 Replies
  • 2234 Views

0 Members and 1 Guest are viewing this topic.

*

Offline chris

  • Neilep Level Member
  • ******
  • 5424
  • The Naked Scientist
    • View Profile
    • The Naked Scientists
Is the "outside temperature" probe on a car subject to wind-chill effects?
I never forget a face, but in your case I'll make an exception - Groucho Marx

*

Offline RD

  • Neilep Level Member
  • ******
  • 8185
    • View Profile
“Wind chill” (feeling colder than the actual ambient temperature) only applies to sweaty humans …
Quote
The Wind chill measures the effect of wind speed on the perception of temperature.
In windy conditions, the air feels cooler than it actually is, because of increased perspiration.[evaporation]
http://en.wikipedia.org/wiki/Apparent_temperature_%28disambiguation%29


It does not apply to non-sweating things ...
Quote
For inanimate objects, the effect of wind chill is to reduce any warmer objects to the ambient temperature more quickly. It cannot, however, reduce the temperature of these objects below the ambient temperature
http://en.wikipedia.org/wiki/Wind_chill#Explanation


If anything on the outside of a fast flying aircraft there would be (some) “wind heat” due to air friction.
http://en.allexperts.com/q/Aeronautical-Engineering-1809/2009/8/Air-friction-heating.htm
« Last Edit: 29/04/2011 11:21:08 by RD »