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Prior to 1969, airworthiness standards for civil aircraft in the United States Federal Aviation Regulations specified that distances were to be in statute miles, and speeds in miles per hour. In 1969, these standards were progressively amended to specify that distances were to be in nautical miles, and speeds in knots. [12]
A basic airspeed indicator with the indicated airspeed (IAS) indicated in knots ("Kt" or "Kts" or "KIAS") -- the most common unit of measure for airspeed. Some airspeed indicators in aircraft prior to the mid-1970s indicate in miles per hour plus knots (1 knot = 1.15 mph) or kilometers per hour (1 knot = 1.85 km/h).
On 18 November 2012 he sailed the Vestas Sailrocket 2 at 55.32 knots in Walvis Bay, ... 21.33 knots (39.50 km/h; 24.55 mph) 517 nmi (957 km; 595 mi)
Airspeed is commonly given in knots (kn). Since 2010, the International Civil Aviation Organization (ICAO) recommends using kilometers per hour (km/h) for airspeed (and meters per second for wind speed on runways), but allows using the de facto standard of knots, and has no set date on when to stop.
The 90 knots (170 km/h; 46 m/s; 100 mph) definition is very non-standard. A common alternative definition of the maximum is 55 knots (102 km/h; 63 mph; 28 m/s). [2] The most common way of describing wind force is with the Beaufort scale [3] that defines a gale as wind from 50 kilometres per hour (14 m/s) to 102 kilometres per hour (28 m/s). It ...
When the maximum speed exceeds the average speed by 10 to 15 knots (19 to 28 km/h; 12 to 17 mph), the term gusts is used while strong gusts is used for departure of 15 to 25 knots (28 to 46 km/h; 17 to 29 mph), and violent gusts when it exceeds 25 knots (46 km/h; 29 mph). [4]
I beg your indulgence while I wax geezerish for a moment: In 1973, when the oil crisis hit, the nation responded by paying irrational prices for higher-mileage cars, took up riding bicycles and ...
It had a top speed of approximately 30 knots (55 km/h; 35 mph), but was planned to be rated down to 25–27 knots (46–50 km/h; 29–31 mph) when the final design was put into production. FCB2, the prototype boat