Recent content by calan

Ok... here's the numbers and math: d = air density = 1.24 Cr = rolling resistance = 0.015 FA = frontal area = 1.48 Cd = drag coefficient = 0.29 pg = percent grade = 0 G = (m * pg) / SQRT(10000 + (pg * pg)) = 0 V = velocity = 37.8 mph = 16.9 m/s A = acceleration = 4.1 mph/s * .4470 = 1.8168...

Hmmm... I've got some units messed up some where or something. I'm getting numbers that don't make any sense in my excel spreadsheet.

So would this be correct? F = (m * A) airDrag = .5 * Cd * FA * d * V * V rollDrag = G * Cr * m Propulsive force = F + airDrag + rollDrag power at wheel = Propulsive force * V (what would the units be here; metric HP?) power at engine = power at wheel * DL

Given the following instantaneous parameters and constants... Known: d = air density = 1.24 Cr = rolling resistance coeffecient = 0.015 FA = frontal area = 1.48 Cd = drag coefficient = 0.29F G = gravity (mps2) = 9.80665 pi = 3.1415926 m = vehicle mass (Kg) = 1542 DL = drivetrain loss = .2 V...