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Only one of us is right.Yes, you guys are right. I was referring to what we (humans) typically think of when it comes to the term "wind chill" - I think the weather guys use the term "real feel"?. My comment was misplaced.
:thumbsup: :thumbsup:thanks for all the input...this idea was really not for me since i winterize my boat by draining the water...i just had the thought as i was reading several post concerning bilge heaters.....an electric blanket may offer someone a short term solution if/when needed....it probably would not be a suitable long term solution....
as far as the discussion relating to how the wind affects inanimate objects, let's not forget the sign below that we see in areas where freezing conditions are a possibility...i have not taken the time to study the physics behind this but i am guessing that since the wind can blow completely around a bridge it would get cooled faster than the road that is on top of the ground, thus the bridge would reach freezing temps faster...i think it is all about the rate of heat loss....
The freezing wind strikes the bridge above and below and on both sides, so it's losing heat from every side. The road is only losing heat from its surface. Even while the temperature on the road surface is dropping, the heat underneath the road keeps it warm enough to prevent icing as temperatures in the atmosphere drop below freezing. Bridges have no way to trap any heat, so they will continually lose heat and freeze shortly after temperatures in the atmosphere hit the freezing point.The bridge doesn't freeze up first because of wind chill. It's subjected to freezing temps on all 4 sides, unlike the road surface.
The freezing wind strikes the bridge above and below and on both sides, so it's losing heat from every side.
The road is only losing heat from its surface. Even while the temperature on the road surface is dropping, the heat underneath the road keeps it warm enough to prevent icing as temperatures in the atmosphere drop below freezing.
The road surface of a bridge is losing heat above and below the road surface because it is subject to the the ambient temperature on all sides of the structure ....an ambient temperature which is lower then the temperature of the bridge's structure itself. That heat loss will occur quicker on a cold windy day, but it's not the wind that is causing it to freeze...it's the freezing ambient air all around the structure. Does a bridge get warmer on 100 degree days because the hot wind is blowing on the bridge or because the ambient air is hot?
As stated numerous times " the wind causes it to freeze faster". In the the south that is critical. If you can get through the night without freezing that is a good thing becuase the temperature will rise enough during the day. Up north where a lot of y'all live, that doesn't matter because the temperature rarely comes above freezing. Therefore, the wind is no relevan in your area, but here it is.
I guess we can all agree to disagree, but a lot of us down here boat all year and need to know the best techniques to prevent freezing without a complete winterization program as used in colder regions. My mehtods have been successul and I guess yours have as well.
The roadway sign says that the "Bridge ices "BEFORE" road". When the ambient temperature is cold enough....wind or no wind....the road will freeze. The warmth of the earth beneath the roadway surface will conduct through the roadway to the surface.....but when the ambient temperature is cold enough long enough to overcome the rate of conduction....the roadway will freeze just like the Bridge.