I got bored a while back and was also fed up with non-bikers scoffing at my tales of just how cold it feels on the bike in the winter.
I did some surfing and eventually cam across a Canadian site that gives wind chill factors. I managed to un-earth the formulae they use to calculate it and stuck it into a spread-sheet.
These are the most up to date I could find.
I now share my efforts with you.
There is a single yellow box at the top left. Enter the air temperature in centigrade.
Don’t dick with the other boxes!
How to read the graph:
The dark blue line is teh air temperature.
The purple line is the speed you are travelling at.
The yellow line is how cold you (average sized person) feels it is.
The light blue line is the amount of time it will take for exposed skin to begin to suffer from frostbite.
The Black line is a smoothed out version of this.
So, with air temperature at 3.5c , riding at 50mph , it would feel like -26c with a frostbite tolerance of about 42 minutes.
Now you can demonstrate your double-hard image with numbers to back you up.
