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1931 Bugatti Type 51 cockpit, with Wilson preselector gearbox. The most common type of pre-selector gearbox was the Wilson, which used an epicyclic design. [5] [6] A precursor to the Wilson gearbox was the manually-controlled epicyclic gearbox used in the 1901–1904 Wilson-Pilcher cars built in the United Kingdom.
Self-Changing Gears was a British company, set up and owned equally by Walter Gordon Wilson and John Davenport Siddeley, to develop and exploit the Wilson or pre-selector gearbox. Self-Changing Gears designed, built and licensed transmissions for various applications including light and heavy road vehicles, military, marine, and rail vehicles ...
This contrasts with a preselector gearbox, in which the driver selects the next gear ratio and operates the pedal, but the gear change within the transmission is performed automatically. The first usage of semi-automatic transmissions was in automobiles, increasing in popularity in the mid-1930s when they were offered by several American car ...
Daimler occasionally used alternative technology: the Daimler-Knight engine which it further developed in the early twentieth century and used from 1909 to 1935, the worm gear final drive fitted from 1909 until after the Second World War, and their patented fluid flywheel used in conjunction with a Wilson preselector gearbox from 1930 to the ...
A smaller 18 hp appeared in 1922 and a 2-litre 14 hp was introduced in 1923. 1928 saw the company's first 15 hp six; 1929 saw the introduction of a 12 hp vehicle. This was a pioneering year for the marque, during which it first offered the Wilson preselector gearbox as an optional extra; it became standard issue on all cars from 1933. In 1930 ...
The Mark II used a 66 hp (49 kW) Rolls-Royce engine which was, along with the Wilson preselector gearbox and transmission, on the right-hand side of the tank. This left the left-hand side free for the driver and commander. Tanks for use in India had an 85 hp (63 kW) Meadows engine and a "crash" gearbox.
Like the scout car, it incorporated some of the most advanced design concepts of the time and is considered one of the best British armoured fighting vehicles of the Second World War. The 95 hp engine was at the rear linked through a fluid flywheel to a Wilson preselector gearbox and then a H-drive arrangement with prop-shafts to each wheel ...
The confusion arises because Wilson designed "epicyclic gearboxes" for the purpose of steering tanks long before his pre-selector gearbox.. March 1917, the Oldbury gearbox trials between 8 different tanks (4 being current production "lozenge" Mark IIs), each fitted with a different transmission.