ARTICLE 13   EQUIVALENCE FORMULAE/MISCELLANEOUS 

13.1      EQUIVALENCE FORMULAE 

1 inch = 2.54 centimeters = 25.4 millimeters
1 millimeter = 0.1 centimeters = 0.03937 inches
1 foot = 12 inches = 0.3048 meters
1 meter = 3.28 feet = 1.0936 yards
1 mile = 1760 yards = 5280 feet = 1.60934 kilometers
1 kilometer = 1000 meters = 1093.6 yards = 0.62137 miles
1 square inch = 6.45 square centimeters
1 cubic inch = 16.387 cubic centimeters
1 cubic centimeter = 0.061 cubic inches
1 U.S. gallon = 4 U.S. quarts = 231.18 cubic inches = 3.785 liters
1 liter = 1000 cubic centimeters = 61.0255 cubic inches = 0.264 U.S. gallons
1 pound = 16 ounces = 453.592 grams
1 kilogram = 1000 grams = 2.2046 pounds
1 mile per hour = 1.467 feet per second = 0.60934 kilometers per hour
1 kilometer per hour = 1.62137 miles per hour
Cylinder volume (displacement) =      3.1416 x bore² x stroke
                                                                       4
Engine displacement = Cylinder volume x number of cylinders
Weight of gasoline = 7.2 pounds per gallon at 60° F
Atmospheric pressure = 29.92” HG = 14.7 P.S.I. = 1.01 Bar
1 Bar = 14.5 P.S.I.
Average speed formula =                   3600 x length of track x number of laps
                                                                 Total time in seconds

13.2          SPORTS CAR/SERIES DRIVER SUIT PATCHES

All competing drivers must display the official series patch on the uppermost right chest of the driver’s uniform, and a SPORTS CAR patch on the uppermost left chest of the driver’s uniform, as shown in the diagram below.  Additionally all drivers must display an elf race fuel patch on their upper left sleeve.