Walker Motor Car Company

Walker Motor Car Company

The Walker Motor Car Company was active from 1905 to 1906 in Detroit, Michigan.

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Supplementary motor area

The supplementary motor area (SMA) is a part of the primate cerebral cortex that contributes to the control of movement. It is located on the midline surface of the hemisphere just in front of (anterior to) the primary motor cortex leg representation. In monkeys the SMA contains a rough map of the body. In humans the body map is not apparent. Neurons in the SMA project directly to the spinal cord and may play a role in the direct control of movement. Possible functions attributed to the SMA include the postural stabilization of the body, the coordination of both sides of the body such as during bimanual action, the control of movements that are internally generated rather than triggered by sensory events, and the control of sequences of movements. All of these proposed functions remain hypotheses. The precise role or roles of the SMA is not yet known. For the discovery of the SMA and its relationship to other motor cortical areas, see the main article on the motor cortex.

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Vacuum motor

In a vacuum motor, the partial vacuum is created by an external pump. These motors were commonly used to power railway turntables in the UK, using vacuum created by a steam locomotive's vacuum brake ejector. The operating principle is similar to a steam engine - in both cases power is extracted from a difference in pressure.[i] Small vacuum motors were also used to operate windscreen wipers in automobiles. In this case, the motors were powered by manifold vacuum. This arrangement was not very satisfactory because, if the throttle were wide open, the wipers would slow down, or even stop. Modern automobiles use electrically powered wipers. Modern automobiles still use a vacuum motor of a kind, however, the vacuum servo. Brakes are operated by a hydraulic system, but they use a 'vacuum motor' to amplify the force provided by the driver.[iv] You could say that the global Industrial Revolution arose because of a 'vacuum motor', because all the early steam engines, especially the pioneering Boulton and Watt engines, operated with almost atmospheric pressure steam. You can easily make a demonstration vacuum engine using a flywheel, simple plumbing parts and a few other simple components, as Neil A Downie shows in the reference. A vacuum system can be used for power transmission, although the maximum power that can be transmitted to a vacuum motor is less than conventional pneumatics. There is an optimum pressure for the operation of a vacuum power transmission system, of around 0.4 bar (8 psig), as Downie also shows. Although less efficient than pneumatics, it can be perfectly workable. For example a 22 mm (7/8") pipe on vacuum can transmit as much power on 0.4 bar (8 psig) as a 6 mm (1/4") pipe on 8 bar (100 psig). The system is efficient enough that Boulton and Watt used vacuum power transmission in their factory. They called the vacuum main in the factory the 'spirit pipe'.

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Bikes Buyers Guide | Halfords UK

Made using the same processes as laptop and electric car batteries, these power sources are what drive the motor, giving riders that boost when they start putting more effort into the pedals. Like any battery, they will need to be recharged and looked after and you could potentially run out of juice if you get carried away and cycle too far (which you definitely will!)

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Motor racing

Recognizing the value of publicity gained from auto racing, which no other British marque did, Edge entered an 8 hp (6 kW) four-cylinder Napier in the Automobile Club's 1900 Thousand Miles (1600 km) Trial of the Automobile Club on behalf of Edward Kennard; driven by Edge, with Kennard along, on a circuit from Newbury to Edinburgh and back, she won her class, being one of only thirty-five finishers (of sixty-four starters) and one of just twelve to average the requisite 12 mph (19 km/h) in England and 10 mph (16 km/h) in Scotland. He did the same (with C. S. Rolls his riding mechanic) at the 837 mi (1350 km) Paris-Toulouse-Paris rally in June; the car would be eliminated due to ignition trouble. In the 1901 Gordon Bennett Cup, Edge entered a special 17-litre Napier which he was only able to test en route because it had been completed on 25 May, only four days before the event. Montague Napier was the riding mechanic. The car was too powerful for the Dunlop tyres and fitting new French tyres led to disqualification, since they were not of the same national of origin. In the concurrent Paris-Bordeaux rally, it retired with clutch trouble. For the 1902 Gordon Bennett, Edge's Napier was the sole British entrant; with his cousin, Cecil Edge, as riding mechanic, he won, at an average 31.8 mph (51.2 km/h) (though by default, since the French entrants all fell out). The preparation of the car was hurried with some parts being fitted on the train to Paris. At the 1903 Gordon Bennett, Edge had an 80 hp (60 kW) Napier, the Type K5, but was disqualified. Edge (with Arthur McDonald, manager of Napiers' Genoa factory, as riding mechanic) fared no better with the K5 in the 1904 Gordon Bennett in Germany. In 1903 Edge's eye for publicity created a world first when, on 2 October, Dorothy Levitt won her class at the Southport Speed Trials driving his 12 Hp Gladiator, shocking British society as she was the first woman, a working secretary, to compete in a 'motor race'. ... "Selwyn Edge, Director of the Napier Car Company and famous racing driver ... spotted Miss Dorothy Levitt amongst his staff, a beautiful secretary with long legs and eyes like pools. In a bid to promote his cars ... Edge decided that she should take part in a race, though first he had to teach her to drive. She surpassed his expectations by winning her class in the 1903 Southport Speed Trial, and proved such a good driver that she was taken on by De Dion for a major publicity stunt." Jean Francois BouzanquetIn June 1907 Edge broke the 24-hour distance record, driving a 60 hp (44.7 kW) Napier six, at the newly opened Brooklands track, accompanied by riding-mechanic Joseph H Blackburn.(Born 17 December 1875 D 8 May 1919) He covered 1,581 miles (2544 km), 1,310 yards at an average speed of 65.905 mph (106.06 km/h). This record stood for 18 years. In 1910 Edge was awarded the Dewar Trophy for his drive in top gear in a 60 hp (45 kW) Napier on the route London-Edinburgh-London. In 1922 Edge returned to Brooklands in a Spyker setting a new "Double 12" world record covering 1,782 miles 1,066 yards (2,868 km 693 m) at an average speed of 74.27 mph (119.53 km/h) for the aggregate 24 hours. His final contribution to motor racing was the inauguration of the Campbell Circuit at Brooklands in 1937.