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Speed limit sign in the Republic of Ireland, using "km/h.". The SI representations, classified as symbols, are "km/h", "km h −1" and "km·h −1".Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "kph", [3] [4] [5] "kmph" and "km/hr" [6] as English abbreviations.
At the time the record of 352 mph (566 km/h) was held by Howard Hughes flying a Hughes H-1 racing aircraft. Although only the prototype K5054 had yet flown, a production Spitfire was expected to be capable of 362 mph (583 km/h) at a height of 16,800 ft (5,100 m). However the speed record had to be flown at an altitude no greater than 245 ft (75 m).
The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299 792 458 metres per second (approximately 1 079 000 000 km/h or 671 000 000 mph).
Typical speed of a modern high-speed train (e.g. latest generation of production TGV); a diving peregrine falcon—fastest bird; 320 km/h or 200 mph is a parameter sometimes used in defining a supercar.
30 knots (56 km/h; 35 mph) Range: 2,400 nmi (4,445 km; 2,762 mi) Endurance: 8 days: Complement: 55: Sensors and processing systems: Combat System: - Hull 628 & 629 only: H/ZKT-series Combat Management System - The rest of the class: Terma C-Flex Combat Management System [3] Search Radar: - Hull 628 & 629 only: 1 × SR-47AG Search Radar - The ...
Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
188.976 mph (304.127 km/h) 78: Bobby Olivero R Alex Foods Alex Morales Lightning, Offenhauser 188.452 mph (303.284 km/h) 86: Al Loquasto Frostie Root Beer Al Loquasto McLaren, Offenhauser 187.647 mph (301.989 km/h) 6 36: Jerry Sneva R 21st Amendment Spirit of America Racers McLaren, Offenhauser 186.616 mph (300.329 km/h) 2: Johnny Rutherford W
Subsequent testing by Road & Track revealed a 0–60 mph (0–97 km/h) time of 3.1 seconds and a quarter mile time of 10.9 seconds at 129.4 mph (208.2 km/h). [20] Lamborghini claimed a top speed of 342 km/h (213 mph) when the car is fitted with an optional smaller spoiler, or 337 km/h (209 mph) with the standard Aeropack spoiler.