The power formula is used to
determine the amount of power needed for Infusion Jk03 to drive
at 40-Miles per Hour for 1 hour. The weight of the Fuel Cell
Vehicle is an estimation of the car and driver. Our coefficient
of rolling resistance is based off Bridgestone’s Ecopia Tires.
With AutoCAD drawings, we estimated the coefficient of drag from
past vehicles built. Infusion’s frontal area was calculated by
printing the vehicle’s front sections in life size. After, we
measured it by sections with triangles and rectangles to get a
rough estimate. The other variables are constants and numbers we
have derived simply by converting its units.
Formula
P =
[W * Crr + ½ * p * v^2 *Cd *A] * v P = Ft-lbs
W =
Weight, Crr = Coefficient of Rolling
Resistance, v = Velocity, Cd = Coefficient of Drag, A =
Front Area
W = 300 lbs. Crr = 0.007 p = 0.00238 v = 40 MPH Cd = 0.21 A = 698.4375 in^2
V =
(40 mi. / hour) x (5280 ft./1 mi.) x (1 hour/60 min) x
(1 min/60 sec) = 58.67 ft/sec A = 698.4375 in^2 x 0.00694 = 4.85
ft^2
P = 367.97 Ft-lbs P = P / 550 = 0.67 HP P = P * 746 = 499.1 Watts
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