Quote:
Originally Posted by TheEnemy
Your talking about the Ford Ranchero?
Does it have an electric, clutch or direct driven flex fan?
Punching my best guess into the calculator I come up with a max of 22mpg between 35 and 45 mph. That is assuming you have a clutch fan, and a standard transmission.
weight 3500 lbs
crr .008 (a bit low I think)
Cd .45 (typical for a truck)
frontal area 20ft^2
Engine efficiency .20
Drivetrain efficiuency .85
Paracitic overhead 5000 (those fans really pull power)
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Yes, a 1961 Ranchero. I'd have an electric fan, standard trans, it weighs ~2400 lb, and it's Cd is probably close to the .34 default.
Here's what I did:
Vehicle weight: 1088.6 kg / 2400 lbs
Crr: .015
Cd: .34
A: 1.9 m2 / 20 ft2
Fuel energy density (Wh/US gal.): 33557
Engine efficiency: .20
Drivetrain efficiency: .95
Parasitic overhead (Watts): 0
rho: 1.22 kg/m3
... which yields 29.4 mpg at 65 mph, and 32.6 mpg at 60 mph.