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[RC] riding in heat - Lori Bertolucci


After having spent the last 2 1/2 summers working in the Bakersfield oilfields, I found that the best way to stay cool was wearing white, long-sleeved t-shirt (100%cotton) and wearing a open bandana under my hardhat. That way the bandana could shade my ears and neck and protect me from the sun. Trust me it is pretty darn hot when you have hot flow lines under foot and steam lines around you and the air temp at 112 degrees. I learned this trick from the farm workers and it really works. And since I was the work horse and didn't have a horse to stir the air for me, I needed all the help I could get. You can find bandanas in your favorite colors and make that fashion statement!  I wore a bright pink one!!

Lori B.

  ----- Original Message -----
  From: Truman Prevatt
  To: Glenda R. Snodgrass
  Cc: Barbara McCrary ; Jonni Jewell ; Ridecamp
  Sent: Tuesday, May 06, 2003 4:33 PM
  Subject: Re: [RC] riding in heat

  Absolutely correct. The only way evaporative cooling can work is when
  the air can absorb additional water vapor. When the humidity is high the
  air is already close to saturation and will not absorb additional water.
  When the humidity is low and it can.  The water takes heat from the skin
  to go from the liquid form to go the vapor form and absorbed by the air.
  Each gram of water will carry off so many calories of heat ( latent heat
  of evaporation).

  This works fine in dry climates but not in more humid climates. Swamp
  coolers work fine in the SW but they sure don't work in the east.

  Many times in the east the only way I have found to get cool is stick my
  head into a cooler full of ice. Of course you have to drink the beer to
  make room:-).


  Glenda R. Snodgrass wrote:

  >>the helmet.  The air flowing through your helmet evaporates the water and
  >>cools the head.  A soaked scarf lasts about 3 hours on a hot day; maybe a
  >>head "cookie" would last a similar amount of time.
  >There is no evaporation when you are in high humidity, which is the
  >biggest problem.  In fact, putting water on and leaving it on during high
  >humidity can exacerbate the problem, as the water absorbs the warmth from
  >sunlight and actually insulates the skin, causing higher temperatures
  >rather than cooler. 
  >Water only helps in hot humid conditions when it is either (1) cold and/or
  >(2) poured on and scraped off quickly.  A wet scarf around the neck is
  >*miserable* in humid weather, except for the first 5 minutes after it
  >comes out of the icechest.