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#21
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Epidemic of cracked windshields in KDEN, explanation unknown
"CRaSH" wrote in message
... Metal screens in front of your windshield (windscreen) and headlights were a common sight............ You never (rarely) see them now days, since the introduction of the laminated windscreen. The weather is doing silly things though. The last 2 days, we had 38 degrees Celsius, and yet today, we're having 23 degrees Celsius, and it's raining! Oz/Crash Lander |
#22
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Epidemic of cracked windshields in KDEN, explanation unknown
On Feb 17, 5:07 pm, Blanche wrote:
Winds on Thursday & Friday reached over 100 mph in the foothills. We don't use salt, as a rule, on the roads. Ice slicer and a combination of fine rocks. Add to this the everyday, run-of-the-mill rocks and gravel kicked up on the roads, and it's normal to replace the windshields every 2-4 years (I'm due this year. Last change was in 2004). Get these winds, a few hefty rocks, and a new windshield sooner than expected. KDEN is surrounded by empty fields (for the most part), which means lots of "stuff" in the area that is kicked up by the winds. Boulder is a town just north of Denver, right at the foothills, which are steep and abrupt. Sometime in the late 80s or early 90s, a windstorm from the west blew out nearly all of the front and back auto windshields in a parking lot. IIRC it wasn't debris, but the wind itself. It gets to howling there some times. Probably nothing to do with the current situation, though. I'd have to think that a wind that strong would also bend the airplanes up a bit. |
#23
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Epidemic of cracked windshields in KDEN, explanation unknown
Jim Macklin wrote:
How cold did it get in Denver? Aluminum and plastic have different contraction rates with cold. Plastic also gets brittle with cold. Wind flexes wing, which also flexes fuselages, erg---cracks. Wow. Really? Isn't it cold at 40000 feet? |
#24
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Epidemic of cracked windshields in KDEN, explanation unknown
On Feb 18, 10:57 pm, Mike Hunt postmaster@localhost wrote:
Jim Macklin wrote: How cold did it get in Denver? Aluminum and plastic have different contraction rates with cold. Plastic also gets brittle with cold. Wind flexes wing, which also flexes fuselages, erg---cracks. Wow. Really? Isn't it cold at 40000 feet? Usually -50. |
#25
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Epidemic of cracked windshields in KDEN, explanation unknown
"Noktomezo" wrote in message oups.com... : On Feb 18, 10:57 pm, Mike Hunt postmaster@localhost wrote: : Jim Macklin wrote: : How cold did it get in Denver? Aluminum and plastic have : different contraction rates with cold. Plastic also gets : brittle with cold. Wind flexes wing, which also flexes : fuselages, erg---cracks. : : Wow. Really? Isn't it cold at 40000 feet? : : Usually -50. : Does anyone know the type aircraft they are talking about here? |
#26
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Epidemic of cracked windshields in KDEN, explanation unknown
Blueskies writes:
Does anyone know the type aircraft they are talking about here? Some Brazilian commuter aircraft were mentioned; possibly a few others. -- Transpose mxsmanic and gmail to reach me by e-mail. |
#27
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Epidemic of cracked windshields in KDEN, explanation unknown
Is it possible that in very cold weather, using some de-icing fluid that is
too hot would cause windshields to crack ? |
#28
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Epidemic of cracked windshields in KDEN, explanation unknown
In article ,
Mxsmanic wrote: Blanche writes: High winds. Low temps (-15F and up) == very cold wind chill factor. Wind chill applies only to people, not things. Not just people. Any warm blooded animal. For that matter, any heat-generating source (object). |
#29
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Epidemic of cracked windshields in KDEN, explanation unknown
For that matter, any heat-generating source (object).
Are you sure about that? I thought water evaporation had a lot to do with it. Jose -- Humans are pack animals. Above all things, they have a deep need to follow something, be it a leader, a creed, or a mob. Whosoever fully understands this holds the world in his hands. for Email, make the obvious change in the address. |
#30
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Epidemic of cracked windshields in KDEN, explanation unknown
Wind chill has everything to do with how fast heat is lost from
someone at body temperature. It's widely held that the old data, that's 'wind chill', is not a very accurate measure of the effect of wind on flesh and there's some work going on for a better measure. The statement the poster made about any heat-generating object is not quite complete, I'm sure he meant to remind us that it's related to the surface temperature of the object, or at least the surface temperatture in no wind conditions. Fans in your computer are there to move air mass against hot objects to carry the heat away, they are trying to create 'wind chill' inside the computer. You can google 'convective heat loss' or 'forced air cooling' if you want to explore the subject in more depth. s Itr has ewverything to do On Feb 21, 9:33 am, Jose wrote: For that matter, any heat-generating source (object). Are you sure about that? I thought water evaporation had a lot to do with it. Jose -- Humans are pack animals. Above all things, they have a deep need to follow something, be it a leader, a creed, or a mob. Whosoever fully understands this holds the world in his hands. for Email, make the obvious change in the address. |
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