1970-1979 Ski-Doo Snowmobiles Service Manual, Page 11Get this manual
4 Table WIND CHILL FACTORS Actual Thermometer Reading (0 F) Estimated Wind Speed in MPH 50 40 30 20 10 -10 -20 -30
CHAPTER ONE
Equivalent Temperature (0 F) Calm 10 15 20 25 30 35 40 50 48 40 36 32 30 28 27 26 40 37 28 22 18 16 13 11 30 27 16 -2 -4 -6 20 16 -5 -10 -15 -18 -20 -21
6 -9 -18 -25 -29 -33 -35 -37
-33 45 -53 -59 -63 -67 -69