If I'd a seen this (below), I wouldn't a' taken the time to write all I did in those posts... Stanley
________________________________ From: oldschoolgwin <[email protected]> To: Nighthawk Motorcycle Lovers! <[email protected]> Sent: Friday, September 18, 2009 1:46:46 AM Subject: [Nighthawk Lovers] Re: Who can do the math??? Well, if we really want to know, it's called convective heat transfer coefficient. We don't feel temperature, we feel heat leaving and entering our body. So at higher velocities the convective coefficient increases (h=W/m^2*K)substantially, hence heat is leaving our body at faster rate - then we say its cold! We should really say heat is leaving me very quickly (humor!). In the summer in the middle of a hot day, the inside temperature may be 78F (air temp) and it feels hot, but in the winter when it's 78F in the same house it feels cold. Hmmm - why is this? Well it's because there are multiple mechanisms effectiving the overall (net) heat transfer from your body. In the summer the wall temperature is hotter than winter - so guess what, now your body is recieveing radiation (heat) at a greater rate than in the winter. So while the air is conducting (theoretically) heat away from your body at the same rate for both summer and winter (function of temperature and air velocity) the radiation is greater in summer so the net heat loss rate is lower in the summer (it's hot in hear). Consider cloudy day and sunny day at the same air temp (same thing radiation is the difference in comfort). So it get's a bit complex when you take into acount the heat capacity of the air (function of moisture content) and air velocity (convective rate) - but this is the basic concept. I.E. the same reason the NH oil coolers are much more effective (probably at least 20X) at hwy speeds than when sitting at a stop sign. But then again at hwy speeds the engine is also generating much more waste heat it has to transfer to the air. Hope this helps. On Sep 17, 1:35 pm, stanley/ Randolph <[email protected]> wrote: > Yuh really don't know whut wind chill is 'til yuh've ridden in winter at > night in Arizona desert. Cold with humiddy is better'n cold with none. I > can take 30 with 95%. I can't take 50 with 30%!! > > Stanley > > ________________________________ > From: Joseph Letourneau <[email protected]> > To: [email protected] > Sent: Thursday, September 17, 2009 2:21:08 PM > Subject: [Nighthawk Lovers] Re: Who can do the math??? > > I ride all through the winter. The only time I dont ride is if there is snow > and ice still on the road. The real reason I do this is cuz the gas prices > are so flippin' high. By the time I get to work it takes a few cups of > coffee and about 15 min's before my teeth stop chattering. > Joey > > --- On Thu, 9/17/09, Dennis Hammerl <[email protected]> wrote: > > > > > > > From: Dennis Hammerl <[email protected]> > > Subject: [Nighthawk Lovers] Re: Who can do the math??? > > To: [email protected] > > Date: Thursday, September 17, 2009, 3:11 PM > > If I > > dress right, I can take about 40, no less thank you. I did > > ride straight thru two years. But I was a whole lot younger > > then. > > > --- On Thu, 9/17/09, Creative Residential Designs > > <[email protected]> wrote: > > > From: Creative Residential Designs > > <[email protected]> > > Subject: [Nighthawk Lovers] Re: Who can do the math??? > > To: [email protected] > > Date: Thursday, September 17, 2009, 8:39 AM > > > The temperature would be a balmy -10 which I don't do > > on my bike, thank you > > very much! ;) > > > ----- Original Message ----- > > From: "NytWing" <[email protected]> > > To: "Nighthawk > > Motorcycle Lovers!" <[email protected]> > > Sent: Thursday, September 17, 2009 4:46 AM > > Subject: [Nighthawk Lovers] Who can do the math??? > > > > If the outside temperature was 44 degrees this morning > > when I left the > > > house, what did it feel like with the wind chill at 65 > > miles per > > > hour??? For those of you in the south who > > don't know what wind chill > > > is, when it's cold outside, the harder with wind > > blows, the colder it > > > feels on the body. Those of us up north know > > what I'm talking about... > > > > > - Hide quoted text - > > - Show quoted text - __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en -~----------~----~----~----~------~----~------~--~---
