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Attached is a dynamic analysis of the Volt EV. The following assumptions were used: Max Motor Power = 136 kW, Max Motor Torque = 273 ftlbf, curb weight = 3140 lb, Passenger = 180 lb, Tire Diameter = 27.2 in, Drag Coefficient = 0.25, Drag Cross Section = 25.3 ft^2, Rolling Resistance = 0.0048, Gear Ratio for max motor torque @60 mph = 4.73. This analysis assumes no gear losses. The methodology was to express the net force on the vehicle as a function of velocity and then integrate acceleration. Results: Time to 60 mph = 8.5 sec, max velocity ~ 100 mph. Attached are the estimated motor torque  velocity and acceleration curves.
It does not appear possible to meet the quoted Volt vehicle performance goals with the "Specifications" listed for the Volt. Some of the above assumptions differ from those listed specifications, but seem more consistent with the Volt performace goals. Please critique assumptions and results.
It does not appear possible to meet the quoted Volt vehicle performance goals with the "Specifications" listed for the Volt. Some of the above assumptions differ from those listed specifications, but seem more consistent with the Volt performace goals. Please critique assumptions and results.
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