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...)|couple]], originated with the work of [[Archimedes]] on [[lever]]s. The rotational analogues of [[force]], [[mass]], and [[acceleration]] are torque, [[moment ...al-combustion]] engines produce useful torque only over a limited range of rotational speeds (typically from around 1,000–6,000 rpm for a small car). The varyi

...example is trying to shift into a gear while traveling outside the gear's speed or directional range, such as reverse while moving forward. ...on can be very difficult to master, as it requires the driver to gauge the speed of the vehicle and throttle accurately. Double clutching occurs if the clu

...meaning distinct from mass (for linear motion) and moment of inertia (for rotational motion). ...mpetus. Buridan further held that the impetus of a body increased with the speed with which it was set in motion, and with its quantity of matter. Clearly,

...sed in early four-stroke engines. It was soon discovered, however, that at rotational speeds approaching 100 revolutions per minute ([[RPM]]) or greater, the [[e At high rotational speeds, consistent flow through the intake and exhaust ports is maintained

...sed in early four-stroke engines. It was soon discovered, however, that at rotational speeds approaching 100 revolutions per minute ([[RPM]]) or greater, the [[e At high rotational speeds, consistent flow through the intake and exhaust ports is maintained

...eir relatively flimsy engine parts. The engine maintains a high rotational speed to dissipate a lot of power without forcing too much strain on the engine. ...en used, leaving the brakes available to make emergency stops. The desired speed is maintained by using engine braking to counteract the acceleration due to

...sed in early four-stroke engines. It was soon discovered, however, that at rotational speeds approaching 100 revolutions per minute ([[RPM]]) or greater, the exh At high rotational speeds, consistent flow through the intake and exhaust ports is maintained

...[Kart racing|kart]]s, both driving wheels are forced to rotate at the same speed, usually on a common [[axle]] driven by a simple chain-drive mechanism. Whe ...ar may make 10 full revolutions, and during that time, the left wheel will speed up because it has further to travel, and the right wheel will slow down cor

...ust gas entering the turbocharger's turbine. This regulates the rotational speed of the turbine and the output of the compressor. The wastegate is opened an ...peed operation of the engine it is important to let the engine run at idle speed for one to three minutes before turning off the engine. [[Saab automobile|S

...ding to the engine speed, thus providing power from extra capacity at high speed, but without wasting fuel at lower speeds. A Nitrous Oxide system is not a ...n the exhaust system tract. A supercharger uses torque generated from the rotational mass internal to the engine through the crank pulley. A turbo relies on th

...al [[velocity]] of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an [[automobile]], such limited slip ...casing, making both axles and subsequently both wheels, rotate at the same speed.

...iprocating motion of the piston with its inherent vibration and rotational-speed-related mechanical stress. As of 2005 the Wankel engine is the only success

...on]]al speed of an input shaft is changed, resulting in a different output speed. However, some of the simplest gearboxes merely change the physical direct ...be an "[[overdrive (mechanics)|overdrive]]" type that increases the output speed.

...ust gas entering the turbocharger's turbine. This regulates the rotational speed of the turbine and the output of the compressor. The wastegate is opened an ...peed operation of the engine it is important to let the engine run at idle speed for one to three minutes before turning off the engine. [[Saab automobile|S

...of gears are appropriate for different people and styles of cycling. Multi-speed bicycles allow gear selection to suit the circumstances, e.g. it may be com ...] of the drivetrain of the bicycle. On [[single-speed bicycle]]s and multi-speed bicycles using [[derailleur gears]], the gear ratio is the ratio of the num

...ectric generator is usually a more practical converter for this high speed rotational energy than a mechanical gearing system would be. ...man named [[Robert Davidson]] built an electric locomotive that attained a speed of four miles an hour. In [[England]] a patent was granted in 1840 for the

...nce the Wankel output shaft is [[gear]]ed to spin at three times the rotor speed, this becomes one combustion 'stroke' per output shaft revolution per rotor ...t also the ability to produce more power by running at higher [[rotational speed|rpm]].

...st production cars because engines could not run long and reliably at high speed due to other factors. This was a minor concern given the benefits in simpli ** I-head engines have more rotational mass, suffer more easily from valve "float", and exhibit a tendency for the

...nerator, which then drives the wheel motors. It might seem odd to convert rotational energy to electrical energy, only to convert it back, but flywheels need to ...man named [[Robert Davidson]] built an electric locomotive that attained a speed of four miles an hour. In [[England]] a patent was granted in 1840 for the

...lly less than 7,000 rpm. However, the [[torque]] (turning force at a given speed) of a Formula One engine is not much higher than a conventional petrol engi ...tional metal valve springs used inside the engine to close the valves. The speed required to operate the engine valves at a higher RPM is much greater than

...hough it did not stall as quickly as conventional engines due to its great rotational inertia. ...ounterclockwise at 900 RPM while the crankshaft spun clockwise at the same speed. This was achieved by the use of bevel gearing at the rear of the crankcas

...] (angular force) evenly, while distributing [[angular velocity]] (turning speed) such that the average for the two output shafts is equal to that of the in ...l be matched, torque goes to zero, speed at the rear goes to zero, and the speed at the front goes to double what it should be, making the left front wheel

...iprocating motion of the piston with its inherent vibration and rotational-speed-related mechanical stress. [[As of 2005]] the [[Wankel engine]] is the only

...st production cars because engines could not run long and reliably at high speed due to other factors. This was a minor concern given the benefits in simpli ** I-head engines have more rotational mass, suffer more easily from valve "float", and exhibit a tendency for the

...defined that a horse can lift 33,000 [[pound-force|pounds force]] with a speed of 1 [[foot (unit of length)|foot]] per [[minute]]: 33,000 [[foot (unit of ...omotive keeps a continuous record of the [[drawbar]] pull exerted, and the speed. From these, the power generated can be calculated. To determine the maxi

...de it easier for riders to propel the machine at speed, but the rotational speed limitation arising from stability and comfort concerns would lead to the ...ast, but unsafe. The rider was high up in the air and traveling at a great speed. If he hit a bad spot in the road he could easily be thrown over the front

...height or width, these are about equal. Angular inertia determines the [[rotational inertia]] of an object for a given rate of rotation. .... To aggravate this (for [[fuel economy]] and to avoid overheating at high speed) tires have limited internal damping. So the "wheel bounce" or resonant mo

...antity of mixture combusted, the engine displacement can be increased, the speed of operation of the engine can be increased, or the mixture quantity (volum ...It is the easiest method of adding power since it neither requires higher rotational speeds nor complicated auxiliaries. The ease of adding power this way (alon

| Alfa Romeo 4 speed [[Manual transmission|manual]]<br>c.1934 Alfa Romeo 3 speed manual ...afts]] and a small Roots supercharger running at 1.33 times [[crankshaft]] speed. The small blower gave, according to Lawrence Pomeroy’s The Grand Prix Ca

...] (angular force) evenly, while distributing [[angular velocity]] (turning speed) such that the average for the two output shafts is equal to that of the in ...n doubling its speed while the rear wheels stop moving; again, the average speed is maintained. The available torque goes to zero, and the left front wheel