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Dirt and grass track bikes have capacities of 250, 350, 500 and in the solo classes and can reach speeds of up to 80 mph (130 km/h) on the straights and with no brakes fitted to the machine. The American Grand National dirt track championship uses motorcycles of up to 750 cc capacities and can reach speeds of up to 130 mph (210 km/h). [1] [2]
The track surface consisted of graded and packed soil covered by 2 inches (5 cm) of gravel, 2 inches (5 cm) of limestone covered with taroid (a solution of tar and oil), 1–2 inches (3–5 cm) of crushed stone chips that were also drenched with taroid, and a final topping of crushed stone. Workers also constructed dozens of buildings, several ...
From fingertips to elbow, 18 inches. Yard: 0.914 m: 3 feet = 36 inches, the practical base unit, defined as the length of the prototype bar held by the Crown or Exchequer. Ell: 1.143 m: From fingertip of outstretched arm to opposite shoulder, 20 nails = 1 + 1 ⁄ 4 yard or 45 inches. Mostly for measuring cloth. Fathom: 1.829 m
The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards.
The units were however redefined many times – during Henry VIII's time standard yards and ells made of brass were manufactured, during Elizabeth I's time these were replaced with standards made of bronze and in 1742, after scientific comparisons showed a variation of up to 0.2% from the mean, a definitive standard yard was proposed (but not ...
The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
1.75 m – (5 feet 8 inches) – height of average U.S. male human as of 2002 (source: U.S. CDC as per female above) 2.4 m – wingspan of a mute swan; 2.5 m – height of a sunflower; 2.7 m – length of a leatherback sea turtle, the largest living turtle; 2.72 m – (8 feet 11 inches) – tallest-known human (Robert Wadlow) [31]
A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute ( 1 / 60 of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).