Wind chill

[MSTRS:Me]

The concorde would lengthen by upto 30cm at supersonic speeds due friction induced heat due to the windspeed. Even though it is bloody cold up there.

Could be handy to lengthen things down here as well with a bit of friction... but sadly... I cannot rub fast enough.

Friction is about resistance, not the speed. I suggest you work on your grip.

[LBD]

Then there is the contribution moisture makes....if you are damp and riding in the dry, the moisture evaporates off creating an even greater cooling affect...

Windchill? Working at 4500m, at night with a minus 40c ambient and 40 gusting to 60 knot wind inside a open steel shell repairing a genset before the antifreeze freezes and splits the engine block....F&*%#* that was a cold night....

[yungatart]

You know me Mom...can't cope with the cold at all...basically I give up riding in winter, as I just can't get enough layers on (even with a root...)
My brain ceases to function and my extremeties won't work!
As fpor a good explanation of wind chill, James Duece can explain it so even a numbskull like me can understand it. Give him a PM...

[boman]

Don't know how accurate this is but we always say that the wind chill in the winter is about -10 deg at 100kph eg 14 deg at 100kph = 4 deg , you got to remember that with all your gear and helmet on you usually cook when you stop if the temps over 17 deg so its probably not far wrong

I rode from Whangamata to Auckland on Sat at o let say 12 deg and even with liners in my gloves most of my fingers went white

About -10 degrees at 100kph is what I have been told and tend to work on. Eg ride to work air temp 1 - 2 deg, with wind chill about -8 deg. Don't know if this is correct, but have been really cold on a 10min ride to work on a frosty morning.

[PrincessBandit]

The concorde would lengthen by upto 30cm at supersonic speeds due friction induced heat due to the windspeed. Even though it is bloody cold up there.

Could be handy to lengthen things down here as well with a bit of friction... but sadly... I cannot rub fast enough.

So rubbing and friction don't lengthen things at all for you? You poor thing!


Oh, it was more length you were after then?

The ride we did on the weekend was in glorious sunny weather, but even with my hot grips on my fingers were still white when I got off the bike in Ngatea. Haha, they were toasty underneath and chilly over the top. That's the Hauraki Plains/Waikato for you though. **runs and hides**

[sinned]

You know me Mom...can't cope with the cold at all...basically I give up riding in winter, as I just can't get enough layers on (even with a root...)
My brain ceases to function and my extremeties won't work!
As fpor a good explanation of wind chill, James Duece can explain it so even a numbskull like me can understand it. Give him a PM...

Now we have been informed about wind chill. What to do about it? Lots of layers are not necessarily effective.
I wear Icebreaker bodyfit 260 with an Oxford chillout on top. Next is the Revit Cordora jacket with liner. That works for me in 0 degree temps. The Oxford chillout is very effective and the zipped high neck keeps all wind out. Heated grips warm the blood flowing back up the arms.

[Mom]

Now we have been informed about wind chill. What to do about it? Lots of layers are not necessarily effective.
I wear Icebreaker bodyfit 260 with an Oxford chillout on top. Next is the Revit Cordora jacket with liner. That works for me in 0 degree temps. The Oxford chillout is very effective and the zipped high neck keeps all wind out. Heated grips warm the blood flowing back up the arms.

Zero degrees is no protection, in fact you are probably better off setting out at zero all rugged up and warm the effect of wind chill is less the colder you get??????

Someone??????

[Squid]

Zero degrees is no protection, in fact you are probably better off setting out at zero all rugged up and warm the effect of wind chill is less the colder you get??????

Someone??????

I guess the effect would be less but by that time you'd woudnt care any more which is always a bad sign.

Why do you want to calculate what the wind chill factor anyways? You could always get a $15 thermometer yoo-hoo glued to the front of your bike in the airflow and measure the temp...

[10bikekid]

this was the best chart I could find

Temperature
(°C)
Wind Speed in Kilometres per Hour (kph)
0 10 20 30 40 50 60 70 80

20 19 16 15 14 13 13 13 13
15 13 10 8 7 6 5 5 5
10 8 4 1 -1 -2 -2 -3 -3
5 2 -3 -6 -8 -9 -10 -11 -11
0 -3 -9 -13 -15 -17 -18 -18 -19

-5 -8 -15 -20 -22 -24 -25 -26 -27
-10 -14 -22 -27 -30 -32 -33 -34 -34
-15 -19 -28 -34 -37 -39 -41 -42 -42
-20 -25 -35 -40 -44 -47 -48 -49 -50
-25 -30 -41 -47 -51 -54 -56 -57 -58

-30 -36 -47 -54 -59 -62 -64 -65 -66
-35 -41 -54 -61 -66 -69 -71 -73 -73
-40 -47 -60 -68 -73 -77 -79 -81 -81
-45 -52 -66 -75 -81 -84 -87 -88 -89
-50 -58 -73 -82 -88 -92 -94 -96 -97

that didn't come out so well did it but it looks like once your speed gets over 60 kph the change isn't great so in brief where looking at say a 10 deg reduction at 15 deg ambient, 19deg reduction at 0 and a 7deg reduction at 20

About -10 degrees at 100kph is what I have been told and tend to work on. Eg ride to work air temp 1 - 2 deg, with wind chill about -8 deg. Don't know if this is correct, but have been really cold on a 10min ride to work on a frosty morning.

Yep and theres the chart to prove it ,
In Europe there is a bike camp held at a place that is -10 deg or lower on the way there they are riding with wind chill of - 35 I'm afraid not that keen as I wont Ride at under 12 deg

[BMWST?]

Is riding at 100kph into no wind the same as standing still in a 100kph wind?

yes 10 char

[Grahameeboy]

Oh, well there goes that attempt to get others thinking about wind chill and how it might affect them I guess. They should know to simply wiki it.

Perhaps you could actually explain for those that dont bother to follow the link how it actually works?

You can get burnt from wind chill..happened to me a lot

[bogan]

Why do you want to calculate what the wind chill factor anyways? You could always get a $15 thermometer yoo-hoo glued to the front of your bike in the airflow and measure the temp...

Thats not how wind-chill works! The air temp is the same no matter how fast you go (well for this application anyway). Wind chill affects people because people are hotter than the air, and the faster you go the more air passes and cools you down to that temp, like a blood filled radiator pretty much. The wind chill factor is the how cold the wind makes it feel, and has to be calculated as it cannot be directly measured.

[10bikekid]

Just out of interest acording to one of the charts I read , at 35 deg the wind chill is + 5 deg, eg 40 deg and at 30 its close to 0 , eg temp stays he same, no wonder its so hot on our bikes on those days

[Mom]

Why do you want to calculate what the wind chill factor anyways? You could always get a $15 thermometer yoo-hoo glued to the front of your bike in the airflow and measure the temp...

I dont want to know how cold it is, I wan to know how cold it is going to feel, so I can dress appropriately. Apart from that I am a curious kinda gal, I am interested in finding out how wind chill works.

[Owl]