Tractive resistance as related to roadway surfaces and motor vehicle operation
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Tractive resistance as related to roadway surfaces and motor vehicle operation by Raymond George Paustian

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Published by Iowa State College in Ames, Ia .
Written in English


  • Automobiles.,
  • Roads.

Book details:

Edition Notes

Statementby R. G. Paustian.
SeriesBulletin 119, Iowa Engineering Experiment Station
LC ClassificationsTL295 .P3
The Physical Object
Pagination64 p.
Number of Pages64
ID Numbers
Open LibraryOL6310201M
LC Control Number34027969

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If the rear wheels of the vehicle in Fig. are driven with no slip taking place between the tyres and the level road surface, the propelling force or tractive effort (TE) is equal to the torque at the driven wheels (T r) divided by their leverage, which is Cited by: 1. The resistance to traction of a vehicle on aroad consists of three independent elements: axle friction, rolling resistance, and grade resistance. Axle Friction. The resistance of the hub to turning on the axle is the same as that of a journal revolving in its bearing, and has nothing to do with the condition of the road surface. Tractive Effort (TE) and Tractive Resistance (TR) Tractive effort (TE): If the rear wheels of the vehicle in the figure are driven with no slip taking place between the tires and the level road surface, the wheel force or the tractive effort (TE) is equal to the torque at the driven wheels (T w) divided by the rolling radius or effective radius (R w). Tractive efforts is defined as the tractive force of a vehicle exerts on a surface or the amount of tractive force is parallel to the direction of motor. Traction or Tractive Force Tractive force is the force used for generate the variation between tangential surface and body.

  Homework Statement I working on this for a high school thesis. I am trying to find the power required to move a lb vehicle over a variety of scenarios, but am having trouble calculating the force of tractive resistance. Rolling Resistance (RR) is the force necessary to propel a vehicle over a particular surface. The worst possible surface type to be encountered by the vehicle should be factored into the equation. F. RR [lb] = W. GV [lb] x C. rr [-] w. where: RR = rolling resistance [lb] W. GV = gross vehicle weight [lb] C. sf = surface friction coeff. 5) Deflection of the road surface. 6) Air drag on the inside and outside of the tire. 7) Energy loss on bumps. Considering the vehicle as a whole, the total rolling resistance is the sum of the resistance from all the wheels: RR = f r w = f r mg. where. of all electric vehicles is the motor. The amount of torque that the driving motor delivers is what plays a decisive role in determining the speed, inclined surface. The grade resistance acting on the vehicle The Total Tractive Effort is the total force required to move the vehicle with the desired characteristics and is the sum of the.

When a vehicle travels at constant speed, its resistance to motion, termed—the tractive resistance, consists of: rolling resistance, wind resistance, and gradient resistance. For a uniform speed, the tractive resistance must be balanced by the tractive effort or driving force produced at the point of contact of the tires on the road by the driving torque. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle . Few results are available on the variation of rolling resistance coefficient, but it is felt that the approximate values quoted for different types of surface are sufficiently accurate. Tractive Resistance as Related to Roadway Surfaces and Motor Vehicle Operation. Iowa State College Bulletin, No. A Critical Study of Aircraft. Tractive Effort and Resistance Major sources of vehicle resistance: Aerodynamic Rolling (originates from the roadway surface/tire interface) Grade or gravitational Tractive Effort and Resistance Illustration of forces with vehicle force diagram F f + F r = ma + R a + R rlf + R rlr + R g F= ma+ R a + R rl + R g Fig. Air Rolling Gravity, R g Tractive Aerodynamic Resistance.