Bike Forums > Wind Chill
 Register All Albums Elite Membership Forum Rules Calendar Search Today's Posts Mark Forums Read

 Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

 01-11-08, 10:41 PM #1 doctor j Senior Member Thread Starter   Join Date: Aug 2006 Location: Central Louisiana Bikes: Posts: 3,039 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 36 Post(s) Wind Chill Here's one of those story problems you hated in math class. Let's say that there is a massive heat wave in southern Wisconsin this weekend, and the ambient temperature on Saturday get's up to 10 deg F. Given the balmy conditions, a hypothetical cyclist named Tom decides that he will take a relaxing ride on a north-south rail trial. Before the ride, Tom watches the weather on the tele and discovers that the prevailing wind is out of the north at 10 mph. Tom begins his ride to the north, directly into the wind and averages 10 mph on the bike. During the initial part of Tom's ride, is the wind chill Tom experiences determined by the 10 mph wind (10 mph, -4 deg F), or is it determined by the 10 mph wind plus Tom's average speed of 10 mph (20 mph, -9 deg F)? What is the effective wind chill on Tom's return trip if he averages 10 mph?
 01-11-08, 11:02 PM #2 gmcttr Senior Member   Join Date: Jul 2006 Location: IN Bikes: Posts: 77 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) 20 mph out and 0 mph on the return.
 01-11-08, 11:15 PM #3 zonatandem Senior Member     Join Date: Dec 2003 Location: Tucson, AZ Bikes: Custom Zona c/f tandem + Scott Plasma single Posts: 10,978 Mentioned: 2 Post(s) Tagged: 0 Thread(s) Quoted: 61 Post(s) No doubt, the wind direction will change!
 01-12-08, 12:33 AM #4 wmodavis Bill   Join Date: May 2007 Location: HIGHLANDS RANCH, CO Bikes: Specialized Globe Sport, Specialized Stumpjumper FSR Pro Posts: 630 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) 20MPH! Except that the heat his body generated working that hard into the wind will raise the ambient temperature thus he's better off.
 01-12-08, 12:46 AM #5 Digital Gee I need more cowbell.     Join Date: Jun 2005 Location: Reno, Nevada Bikes: 2015 Specialized Sirrus Elite, 2012 Masi Evoluzione Posts: 8,111 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 2 Post(s) Who are you kidding? Tom wouldn't ever go out in conditions like that! __________________ 2015 Sirrus Elite 2012 Masi Evoluzione Proud member of the original Club Tombay
 01-12-08, 02:08 AM #6 stapfam Time for a change.     Join Date: Jan 2004 Location: 6 miles inland from the coast of Sussex, in the South East of England Bikes: Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno. Posts: 19,915 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 1 Post(s) A Hypothetical Tom riding at 10 mph into a 10 mph headwind at 10degF? He'd have more sense and turn round and find the nearest cafe for pie. __________________ How long was I in the army? Five foot seven. Spike Milligan
 01-12-08, 05:18 AM #7 cranky old dude Senior Member   Join Date: Jul 2006 Bikes: Posts: 4,259 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) 10 degrees F blows no matter which way the wind is coming from!
01-12-08, 07:28 AM   #8
Monoborracho
Senior Member

Join Date: Dec 2005
Location: Deep In The Heart
Bikes: Seven Ti Tandem, Blue T12 tri bike, 92 Paramount, 93 Schwinn Mesa MTB, Soma Saga
Posts: 2,635
Mentioned: 0 Post(s)
Quoted: 56 Post(s)
Quote:
 Originally Posted by gmcttr 20 mph out and 0 mph on the return.

+1

I once posed this almost exact question to a friend and lunch mate of many years named Charles Passel, who knew a little about this subject.

Just name dropping here.
__________________
"When buying and selling are controlled by legislation the first things to be bought and sold are legislators"......P. J. O'Rourke

Last edited by Monoborracho; 01-12-08 at 08:06 AM.

 01-12-08, 07:31 AM #9 Kurt Erlenbach Senior Member     Join Date: Jul 2007 Location: Space Coast, Florida Bikes: Posts: 2,423 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) I don't know. It's 65, sunny, and no wind here, so I'm going out for a ride.
01-12-08, 07:44 AM   #10
cranky old dude
Senior Member

Join Date: Jul 2006
Bikes:
Posts: 4,259
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
 Originally Posted by Kerlenbach I don't know. It's 65, sunny, and no wind here, so I'm going out for a ride.
Don't you ever get tired of good weather? Me thinks you need some variety down there.

 01-12-08, 08:16 AM #11 Motorad Peddlin' Around Detroit     Join Date: Dec 2006 Location: Livonia, MI Bikes: Legend, Saluki, Trek 730 Posts: 740 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Okay, wind chill is a bad thing for carbon based units (quoting first Star Trek movie). But does wind chill effect inorganics ... like metal? Would it be any harder to start a car in Michigan if it is zero degrees F with no wind ... or if it is zero degrees F with a 20 MPH wind?
01-12-08, 08:33 AM   #12
Banned.

Join Date: Jan 2006
Bikes: GF Wahoo '05, Trek T1000 '04, Lemond Buenos Aires '07
Posts: 4,938
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
 Originally Posted by Motorad Okay, wind chill is a bad thing for carbon based units (quoting first Star Trek movie). But does wind chill effect inorganics ... like metal? Would it be any harder to start a car in Michigan if it is zero degrees F with no wind ... or if it is zero degrees F with a 20 MPH wind?
They discussed this question on "Car Talk" (NPR) and said, no, it doesn't affect inorganics, so a car would be no harder to start. It would only cool down a bit quicker. According to the Tappett Brothers.

01-12-08, 09:18 AM   #13
BSLeVan
Senior Member

Join Date: Feb 2007
Location: S.E. Pennsylvania, USA
Bikes:
Posts: 1,737
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Quote:
 Originally Posted by wmodavis Except that the heat his body generated working that hard into the wind will raise the ambient temperature thus he's better off.
This is the thing that makes it difficult to calculate. How much heat does his body generate; how much of that is radiating away from his body, causing a thermal barrier against any wind; and, what kind of and how many layers is he wearing that will trap the thermal barrier?

 01-12-08, 11:50 AM #14 Old School Senior Member     Join Date: Jan 2006 Location: Marin County, CA Bikes: Trek 5500 OCLV, Trek Fuel EX 9 Posts: 1,179 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Depends on whether he wears shoe covers and helmet cover or not...
 01-12-08, 01:58 PM #15 Speedskater Senior Member     Join Date: Jun 2007 Location: Cleveland Bikes: Bob Jackson, Trek & Sampson Posts: 321 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 23 Post(s) Wind chill affects all warm bodies. But what we call "Wind Chill" includes physiological factors. Your car radiator will cool faster if you point the car into the wind.
01-12-08, 02:13 PM   #16
Beverly
Senior Member ??

Join Date: Sep 2004
Location: Englewood,Ohio
Bikes: 2007 Trek Madone 5.0 WSD - 2007 Trek 4300 WSD - 2008 Trek 520 - 2014 Catrike Trail
Posts: 5,094
Mentioned: 1 Post(s)
Quoted: 0 Post(s)
Quote:
 Originally Posted by cranky old dude Don't you ever get tired of good weather? Me thinks you need some variety down there.
Yea, how do they ever get anything done around the house with all that good weather? I use the winter months to get caught up on projects around the house as I'm out on the bike all other times
__________________
=============================================================

Enjoy the little things in life, for one day you may look back and realize they were the big things.
-- Antonio Smith

01-12-08, 03:26 PM   #17
Kurt Erlenbach
Senior Member

Join Date: Jul 2007
Location: Space Coast, Florida
Bikes:
Posts: 2,423
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
 Originally Posted by Beverly Yea, how do they ever get anything done around the house with all that good weather? I use the winter months to get caught up on projects around the house as I'm out on the bike all other times
That's why there a wife and children. But wait, isn't this off topic?