Quote:
Originally Posted by Xist
My sister had me drive her car, which really must have seemed like a good idea at the time. When I did not have passengers, I pulsed and glided on the freeway, and it seemed completely different than my car.
Her car weighs over 51% more than mine, with a 44% larger engine and 70% more horsepower, but has the same highway rating.
She laughs at the EPA rating, while I beat it easily.
It seemed to coast much further, so I tried to keep track, and it appeared to travel about .75 miles while going from 70 MPH to fifty.
How much of that would be inertia versus friction? Would my car coast in neutral worse just because of all-wheel drive? |
Every vehicles coasting will be affected by:
*Mass
*power absorption coefficient of the tires
*Mechanical efficiency(unloaded)of the entire powertrain
*Frontal area
*Coefficient of aerodynamic drag
And that's not to mention
*tire pressure
*road surface
*straightness of the road
*curvature of the road
*Grade of the road
*State of ambient equilibrium lubricant temperature
*State of ambient equilibrium tire temperature
*weather: (temp,humidity,barometric (station)pressure,wind,wind direction,precipitation)
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We'd need to know everything we could about everything mentioned.