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Continuous tractive effort is often shown in graph form at a range of speeds as part of a tractive effort curve. [ 1 ] Vehicles having a hydrodynamic coupling , hydrodynamic torque multiplier or electric motor as part of the power transmission system may also have a maximum continuous tractive effort rating, which is the highest tractive force ...
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).
Drawbar pull is the difference between tractive effort available and tractive effort required to overcome resistance at a specified speed. Drawbar pull data for a vehicle is usually determined by measuring the amount of available tractive force using a dynamometer , and then combining that data with coastdown [ 1 ] data to obtain the available ...
Grousers function by trapping soil against the contact area of the track. It is the shearing of the soil against itself that generates tractive force.The gross tractive effort, or soil thrust, of a vehicle may be calculated from the equation: [8]
Baldwin conceived the type as an expansion of the 2-6-6-2 permitting a greater tractive effort. The next order for the type was from the Southern Pacific; these differed in being cab forward locomotives, so that the crew could have better visibility and breathing in the SP's long tunnels and snow sheds.
The AMC's design, based on the C&O's T-1 2-10-4s – themselves based on the Erie's 2-8-4s – generated 64,100 pounds-force (285 kN) of tractive effort with 69-inch (1,750 mm) drivers and became the basis for many subsequent Berkshire designs.
The Ford N-series tractor helped revolutionize modern mechanized agriculture with its Ferguson three point hitch. A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction.
In 1913 an initial design for a four-cylinder 2-10-0 of 53,328 pounds-force (237,000 N) tractive effort was produced by the Lancashire and Yorkshire Railway, but none were built. This had been inspired by Jean-Baptiste Flamme's Type 36 (SNCB) [ fr ] 2-10-0s working in Belgium and used a similar tapered boiler, with the round-topped firebox ...