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Aircraft speed: Difference between revisions
→True airspeed
Evandenberg (talk | contribs) m (and correcting my mistakes...) |
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Often TAS and GS are assumed (confused) to be the same, they are not. | Often TAS and GS are assumed (confused) to be the same, they are not. | ||
[[File:C182s-ais-tas.png|thumb|Airspeed Indicator from the [[Cessna_182S]] showing difference between IAS (118 knots) and TAS (134 knots).Note the white TAS disc was rotated to match OAT and pressure altitude (+10° / 8000ft)]] | |||
Some planes Airspeed Indicators have a disc that can be rotated to obtain the TAS. Usually you need to set your Altimeter to pressure Altitude (29.92 inHg / 1013.25 hPa) and rotate the disc so the altitude and outside air temperature (OAT) align. The needle then will point to the TAS. The differences can get quite huge. | |||
=== Indicated airspeed === | === Indicated airspeed === | ||