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The term tractive effort is often qualified as starting tractive effort, continuous tractive effort and maximum tractive effort.These terms apply to different operating conditions, but are related by common mechanical factors: input torque to the driving wheels, the wheel diameter, coefficient of friction (μ) between the driving wheels and supporting surface, and the weight applied to the ...
Traction can also refer to the maximum tractive force between a body and a surface, as limited by available friction; when this is the case, traction is often expressed as the ratio of the maximum tractive force to the normal force and is termed the coefficient of traction (similar to coefficient of friction).
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The EM-1 produced 115,000 pounds-force (510 kN) of tractive effort on 64-inch (1.6 m) drivers with 235 pounds per square inch (1.62 MPa) steam pressure and four 24-by-32-inch (0.61 by 0.81 m) cylinders. The tender carried 22,000 US gallons (83 m 3) of water and 25 tons of coal. The engine weighed 627,000 pounds (284 t) while the tender weighed ...
Laban effort graph with effort elements labeled. Effort, or what Laban sometimes described as dynamics, is a system for understanding the more subtle characteristics about movement with respect to inner intention. The difference between punching someone in anger and reaching for a glass is slight in terms of body organization – both rely on ...
This reduced the tractive effort, from nearly 65,000 lbs to just over 58,000 lbs. [22] 6110 was similarly treated, as were 7 of the production T1's. Two T1's received different alternative forms of valve gear. 5500 was rebuilt following an accident in 1948 with Franklin Type B-2 valve gear, replacing the original oscillating cams with rotary cams.
The strength of these engines lies in the fact that all wheels, including, in some engines, those under the tender, are driven so that all the weight develops tractive effort. A high ratio of piston strokes to wheel revolutions allowed them to run at partial slip, where a conventional rod engine would spin its drive wheels and burn rails ...
Motors for added tractive effort, or MATEs, appear similar to slugs, but their design is different. Instead of siphoning off power as a slug does, the axles in a MATE are fully connected into the transition series in the locomotive it is connected to.