Login required to started new threads

Login required to post replies

Re: How much faster can warm humid air be than cool dry air [burnthesheep]
burnthesheep wrote:
jaretj wrote:
Straight up math using me as an example

93F (33.9C), 80%RH 1 atmosphere, Bike and rider at 74.84KG, CDA .22, crr .005 (Air density 1.1313)

It should take me 204 watts to go 24.5 mph

50F (10C), 10%RH 1 atmosphere, Bike and rider at 74.84KG, CDA .22, crr .005 (Air density 1.246)

It should take me 220 watts to go 24.5 mph

How many more watts you think you'd make for AP over a 40k between those two days?

The math is real. For me the physiology sucks.

My body heats up and I can't produce. I'm not a pro. I'm just a hobbyist. Hot weather on longer or repeated efforts affects my power big time.

I could probably make the 16w up given a nearly 45 degree temp difference.

Perhaps I don't understand what you are saying but the power required to go a specific speed is independent of the distance.

If you give me a certain speed, temp, humidity, air pressure, CDA, crr, mass of rider+bike I can figure out any ideal power/speed you'd like. You could even include slope and powertrain losses if you'd like.

I'm not saying I can/could do 220 watts for a 40K right now but that's what's required for me to go 24.5mph at the conditions specified above.

Edit: You could also figure it out here https://analyticcycling.com/ForcesPower_Page.html
Last edited by: jaretj: Jul 20, 20 9:16

Edit Log:

  • Post edited by jaretj (Dawson Saddle) on Jul 20, 20 9:16