speed limit indicator

The airspeed indicator (ASI) or airspeed gauge is a flight instrument indicating the airspeed of an aircraft in kilometres per hour (km/h), knots (kn or kt), miles per hour (MPH) and/or metres per second (m/s). The recommendation by ICAO is to use km/h, however knots (kt) is currently the most used unit. The ASI measures the pressure differential between static pressure from the static port, and total pressure from the pitot tube. This difference in pressure is registered with the ASI pointer on the face of the instrument.

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  1. quilkin

    A couple more newbie questions

    Had my new MG5 SE for a week now, taking it easy on local roads, only done about 100 miles so far. Generally happy, but very disappointed with the speed limit indicator. In various hire cars I have used over the past 2-3 years, these have been reasonably accurate, presumably using mapped data to...
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