Poseur
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Espada III - well if you have a family and need a Lamborghini, what else do you drive?
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I think I'll just go and wash my screen - looking a bit dirty. What's that you say? Slushy ice? Ohhh noooo. Heated washer jets. > here now>
How? You got one of those Webasto whatchamacallits?
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Snowing down here in the South West. M5 down to 1 lane between Wellington and Taunton for a little bit.
Still got overtaken by a moron in an Audi RS2 going quite quickly down a dual carriageway- with the outside lane very slushy.
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Wind chill will have no effect, Boyles law
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3 inches throughout the evening yesterday here in Frankfurt, and for once the German efficiency was found wanting as the gritters hadn´t been out. Our journey back last night was eventful! Thank goodness for winter tyres.
Although it was annoying to constantly be held up by Beemers on normal tyres slithering around. Grr. Ultimate driving machinè? Not in those conditions..
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It's on mornings like this that I miss my Ford heated screen, why can't Volvo do one for the S60!?
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Heated nozzles should be standard fit on every new car, it's an essential bit of safety kit.
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"Wind chill will have no effect, Boyles law"
Under conditions of constant temperature and quantity, there is an inverse relationship between the volume and pressure for an ideal gas?
Insert finger in mouth. Wet it. Take it out and blow on it. Note the drop in temperature. Increased wind speed increases the rate of evaporation, leading to cooling.
V
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>Wind chill will have no effect, Boyle's law
Really? Have you ever used one of those pot wine chillers that rely on evaporation to chil your wine? Evaporation removes the more volatile part of the screenwash. Increase the wind speed (the air on a frosty morning will have approx 0% humidity as any water vapour will condense on sub-zero items (which is why you get frost)) and increase evaporation rate. Screenwash is a mixture of alcohol and water, so the alcohol will evaporate preferentially, and the alcohol is the thing that stops the screenwash from freezing, so you are left with water... which freezes.
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windchill
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sorry to switch to windchill from the o.p.
i always understood windchill to be defined as a human "illusory" sensory thingy, not a reality.
whereas convection is a real physical thingy.
question is, what happens when a car is travelling at 30mph in the same direction of a 40mph wind, and conversely when it is travelling in the opposite direction. does the convection asistance equate to minus10mph in the firt case and plus70mph in the second case?
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"question is, what happens when a car is travelling at 30mph in the same direction of a 40mph wind, and conversely when it is travelling in the opposite direction. does the convection asistance equate to minus10mph in the firt case and plus70mph in the second case?"
+10 and +70. The speed of the wind is always positive; it's direction may change. The convection assistance comes from the speed of the wind; the direction is irrelevant.
I use speed as a physics term, where it is different from velocity: Speed is a scalar [has a magnitude], velocity is a vector [has a magnitude and a direction].
V
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ref: "it's direction".
Unreserved apologies for the solecism. Oh, for an edit button.
V
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10 and +70. The speed of the wind is always positive;
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eh ? i am puzzled. effect of wind direction on car:
negative = wind assistance, and positive = drag
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Yawn... zzzzzzzzzzzzzzzzzzzzzzzz!
You lot finished yet?
B O R I N G ! ;-)
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Suggest it should be +10 and +70 as Vin says though it is +10 on the back of the car and +70 on the front.
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Well bad snow up here in the central belt of Scotland today.
Observations?
Rear wheel drive - you can keep it!
4WDs - whats the point if you then hand the keys of it to a woman who doesn't actually know how to drive it in the snow?
Lights - yes these are on the car for a reason!
Saw a Mazda RX7 (I think) with a very low front spoiler - it was just acting as a snow plough , hilarious to watch!
Don't know if all cars are the same, but my Scenic wipers kept wiping the snow from the windscreen to underneat the wipers, this snow of course grew and grew, until I had to stop and get out and brush it all away so the wipers could work properly.
And who else is like me? The first sign of the snow and you are out driving in it even though you know it makes sense to just stay at home!
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"And who else is like me? The first sign of the snow and you are out driving in it even though you know it makes sense to just stay at home"
Me too, I remember being stuck on the M8 all morning a few years back (just next to the services thank god) and it is quite exciting
I've got to go to Skye next week !
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Can we keep to the subject matter please.
Hugo - BR Moderator
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Sorry Bobby,
That message wasn't aimed at you. It was a reply to the last of those who went off on a tanget above.
If you click on "View Threaded" you'll understand what I mean.
Hugo
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Sorry
Cold and horrible here too, people don't know how to drive properly in snow (me included) etc,etc
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