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Aircraft speed: Difference between revisions
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Speed combines two factors, the ''distance'' travelled in a certain amount of ''time''. In aviation speed is most often expressed in | Speed combines two factors, the ''distance'' travelled in a certain amount of ''time''. In aviation speed is most often expressed in '''knots''' (kt). One knot is one nautical mile per hour. In aircraft the speed is "measured" with a [[#Pitot tube|pitot tube]], the result is not the speed of the aircraft, it is the speed of the air flowing around the aircraft, the [http://en.wikipedia.org/wiki/Airspeed '''airspeed''']. | ||
In older planes, notably German WW II fighter planes, the airspeed is indicated in kilometres per hour (km/h), which is still used in present-day European glider planes. The conversion factor is 1.852, i.e. you can roughly divide a reading in km/h by two in order to get the value in knot. | In older planes, notably German WW II fighter planes, the airspeed is indicated in kilometres per hour (km/h), which is still used in present-day European glider planes. The conversion factor is 1.852, i.e. you can roughly divide a reading in km/h by two in order to get the value in knot. | ||