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Authors:
Fred L. Mannering, Scott S. Washburn
Chapter:
Road Vehicle Performance
Exercise:
Problems
Question:6 | ISBN:9781118120149 | Edition: 5

Question

A 3200-lb car (CD = 0.35, Af = 25 ft2, and ρ =0.002378 slugs/ft3) has 14-inch–radius wheels, adrivetrain efficiency of 93%, an overall gear reduction ratio of 3.2 to 1, and drive axle slippage of 3.5%. The engine develops a maximum torque of 210 ft-lb at 3600 rev/min. What is the maximum grade this vehicle could ascend, on a paved surface, while the engine is developing maximum torque? (Assume that the available tractive effort is the engine-generated tractive effort.)

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