How is tractive effort measured?

For the cars in the curve, the tractive effort required is 0.8 pounds per ton per degree of curvature, where curvature is defined as the number of degrees the track curves per 100 feet. Degree of curvature can be calculated if the curve radius is known by dividing 5730 feet by the radius.

What is unit tractive force?

In hydraulics, drag or shear developed on the wetted area of a streambed, acting in the direction of flow. As measured per unit of wetted area, unit tractive force equals the specific weight of water times hydraulic radius times slope of channel bed (Chow, 1957).

What is tractive effort formula?

The tractive force between a car wheel and the surface can be expressed as. F = μt W. = μt m ag (1) where. F = traction effort or force acting on the wheel from the surface (N, lbf)

What is tractive effort defined as?

Definition of tractive effort : the force in pounds exerted by powered equipment (as a locomotive) as measured for statistical purposes at the rim of the driving wheels.

What is tractive effort & What are the forces that resist?

The tractive effort required to overcome train resistance: The resistance of the train is mainly due to various kinds of friction. The three basic types of friction responsible for the train resistances are Coulomb friction, viscous friction and air friction.

Is tractive effort the same as torque?

The tractive effort is obtained by multiplying the torque by the total ratio of power train and dividing this sum by the rolling radius of the driving tyres. r = Rolling radius of loaded driving tyre in inches.

What is tractive effort and tractive resistance?

When tractive effort TE is equal to the tractive resistance TR a vehicle would be either stationary or moving at a uniform velocity. It the tractive effort exceeds the resistance the vehicle will accelerate until the tractive effort once again equals the tractive resistance.

What is the difference between tractive force and tractive effort?

In automotive engineering, the terms are distinctive: tractive effort is generally higher than tractive force by the amount of rolling resistance present, and both terms are higher than the amount of drawbar pull by the total resistance present (including air resistance and grade).