Posted by jdemaris on January 21, 2014 at 11:42:17 from (70.194.7.174):
I got reading the paper this morning here in northern Michigan. The principal of the school in Posen (Potato farming capitol of Michigan by Lake Huron) says that they've almost used all the allowed snow days. He says not just because of snow. The principal says the 20 below 0 F "wind chill" temps make diesel school buses unsafe to run! The actual temps on the days closed have been around 5-6 below F, including this morning.
Now excuse my ignorance - but since when does "wind chill" have anything to do with diesel fuel gelling? As I recall, it is the actual temp that determines that - and not the "wind chill" factor.
As I understand it - wind chill is a factor of how fast something cools due to wind and has nothing to do with actual temps. By this principal's reasoning - a glass of water would freeze at 45 degrees F if the wind-chill was determined to be 30 F?
Like I said, maybe I'm missing some fine point here - but I don't think so. Besides - don't most modern diesels heat fuel and recirculate it back to the tank? I well understand how diesel fuel gels or gets ice crystals. I don't don't comprehend this "wind chill" thing.
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