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A draft horse (US) or draught horse (UK), also known as dray horse, carthorse, work horse or heavy horse, is a large horse bred to be a working animal hauling freight and doing heavy agricultural tasks such as plowing. There are a number of breeds, with varying characteristics, but all share common traits of strength, patience, and a docile ...
The term "horse power" probably predates the name of the horsepower unit of measurement. [Notes 1] The word "power" in late-19th-century American English, for example, was often used for any example in the whole category of power sources, including water powers, wind powers, horse powers (for example, sweep powers), dog powers, and even (in a few cases) sheep powers; in the Pennsylvania Oil ...
The modern Percheron draft breed may in part descend from destriers, though it is probably taller and heavier than the average destrier. Other draft breeds such as the Shire claim destrier ancestry, though proof is less certain. Modern attempts to reproduce the destrier type usually involve crossing an athletic riding horse with a light draft type.
The horses have been used throughout history as war horses, both as cavalry mounts and to draw artillery, and are used today mainly for heavy draft and farm work, meat production and competitive driving events. They have also been used to influence or create several other horse breeds throughout Europe and Asia.
Although some breeds of draft horses have declined in weight in modern times, the Trait du Nord has remained relatively large. [5] The average size in the breed is 16.1 hands (65 inches, 165 cm) for mares and 16.2 to 16.3 hands (66 to 67 inches, 168 to 170 cm) for stallions, weighing 1,800 to 2,000 pounds (800 to 900 kg) for mares and 1,870 to ...
The Boulonnais, also known as the "White Marble Horse", [1] is a draft horse breed. It is known for its large but elegant appearance and is usually gray, although chestnut and black are also allowed by the French breed registry. Originally there were several sub-types, but they were crossbred until only one is seen today.
Gasoline engines up to WWII were often valve in block design (L-head), during the war more overhead valve (ohv) engines were used, and after the war all new engines (except 1 F-head and 1 Overhead camshaft (ohc)) have been ohv. All diesel engines have ohv, they can be naturally aspired, supercharged (SC), or turbocharged (TC).
By way of comparison, the Soviet Army used a single basic engine (the V-12 diesel Kharkiv V-2) to power the majority of its tanks – with a few modifications – starting with the BT-7M and its successor the T-34, [34] producing 500 hp (370 kW) @ 1800 rpm in 1939; [35] the SU-85 and SU-100; the KV-1 and KV-2 (600 hp with supercharging in 1939 ...