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The D9 is a series of heavy tracked-type tractors, carried on continuous tracks and usually used as bulldozers. The series began in 1954 with a prototype tractor called the D9X. Ten D9X prototype models were built in 1954. In 1955, the 286 hp (213 kW) D9 was introduced to compete against the more powerful Euclid TC-12.
1970: D8 46a 48a power increased 280 hp (210 kW) 1974: 300 hp (220 kW) D8K replaced the D8H. 1982: 335 hp (250 kW) D8L replaced D8K. The D8L was the first D8 with the elevated drive sprocket undercarriage. 1984: D8L SA (special application) for farming applications premiers. Available with a three point hitch, for mounted implements.
The D8 was largely a facelifted D5 and continued to use the same 218 cu in (3.6 L) flathead straight-six engine developing 87 hp (65 kW) at 3600 rpm, single-disc dry-plate clutch, and three-speed manual transmission. A vacuum-operated semi-automatic system was an available option.
An IDF Caterpillar D9: a Caterpillar D9R bulldozer with Israeli armour used by the Israel Defense Forces. The armoured bulldozer is a basic tool of combat engineering.These combat engineering vehicles combine the earth moving capabilities of the bulldozer with armour which protects the vehicle and its operator in or near combat.
CAT D10N at work in Rishon LeZion, Israel. Among modern tractors, the High Drive (elevated sprocket) design was unique to Caterpillar products. The concept originated in 1914 with Caterpillar predecessor C. L. Best Tractor's 30 Humpback; [citation needed] this tractor was discontinued a year later, and the only other tractor to use the concept until the D10's introduction was the Cletrac Model ...
In embedded systems, a board support package (BSP) is the layer of software containing hardware-specific boot loaders, device drivers and other routines that allow a given embedded operating system, for example a real-time operating system (RTOS), to function in a given hardware environment (a motherboard), integrated with the embedded operating system.
A series of improved models were later produced, including the D7C in 1955, the D7D in 1959, the 160 hp (120 kW) D7E in 1961, the 180 hp (130 kW) D7F in 1969 and the 200 hp (150 kW) D7G in 1974. In 1986 the 215 hp (160 kW) D7H was the first D7 equipped with Caterpillar’s elevated drive sprocket undercarriage.
Digital-S, later known as D-9, is a professional digital videocassette format created by JVC in 1995. It is a direct competitor to Sony 's Digital Betacam . Its name was changed to D-9 in 1999 by the SMPTE .