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  2. Gear train - Wikipedia

    en.wikipedia.org/wiki/Gear_train

    The gear ratios in transmission and final drive are important because different gear ratios will change the characteristics of a vehicle's performance. Valve timing gears on a Ford Taunus V4 engine — the small gear is on the crankshaft, the larger gear is on the camshaft. The crankshaft gear has 34 teeth, the camshaft gear has 68 teeth and ...

  3. Geared turbofan - Wikipedia

    en.wikipedia.org/wiki/Geared_turbofan

    However, economically scaling the idea from small engines to medium and large ones was not possible until the 21st century. After considering a geared design, General Electric and Safran decided against it for their CFM LEAP due to weight and reliability concerns, postponing its use for a future application, when Pratt & Whitney began ...

  4. Transmission (mechanical device) - Wikipedia

    en.wikipedia.org/wiki/Transmission_(mechanical...

    Many transmissions – especially for transportation applications – have multiple gears that are used to change the ratio of input speed (e.g. engine rpm) to the output speed (e.g. the speed of a car) as required for a given situation. Gear (ratio) selection can be manual, semi-automatic, or automatic.

  5. Gear - Wikipedia

    en.wikipedia.org/wiki/Gear

    The opposite effect is obtained when a large gear drives a small one. The changes are proportional to the gear ratio r, the ratio of the tooth counts: namely, ⁠ T 2 / T 1 ⁠ = r = ⁠ N 2 / N 1 ⁠, and ⁠ ω 2 / ω 1 ⁠ = ⁠ 1 / r ⁠ = ⁠ N 1 / N 2 ⁠. Depending on the geometry of the pair, the sense of rotation may also be inverted ...

  6. Reduction drive - Wikipedia

    en.wikipedia.org/wiki/Reduction_drive

    The Midwest twin-rotor wankel engine has an eccentric shaft that spins up to 7,800 rpm, so a 2.96:1 reduction gear is used. Aero-engine reduction gears are typically of the gear type, but smaller two-stroke engines such as the Rotax 582 use belt drive with toothed belts, which is a cheap and lightweight option with built-in damping of power surges.

  7. Mercedes-Benz first series automatic transmission - Wikipedia

    en.wikipedia.org/wiki/Mercedes-Benz_first_series...

    With the small block V8 engine M 116, the K4A 040 (Type 722.2) was launched as a more powerful version of the same design. When the torque converter technique was fully established, the fluid coupling was replaced by a torque converter for the smaller engines, which leads to the W4B 025 (type 722.1). [ 4 ]

  8. GWR 5100 Class - Wikipedia

    en.wikipedia.org/wiki/GWR_5100_Class

    The Churchward 3100/5100, 3150, 5101, Collett 3100, 6100 and 8100 classes are collectively nicknamed "Large Prairies" while the smaller 4400, 4500 and 4575 classes are known as "Small Prairies". See also

  9. ZF 4HP transmission - Wikipedia

    en.wikipedia.org/wiki/ZF_4HP_transmission

    The 4HP is a 4-speed Automatic transmission family with a hydrodynamic Torque converter with an electronic hydraulic control for passenger cars from ZF Friedrichshafen AG.In selector level position "P", the output is locked mechanically.

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