True airspeed, Mach and equivalent airspeed from calibrated airspeed, pressure a...

{ "method": "GET", "queryParams": { "casKt": 150, "oatC": -5, "pressureAltitudeFt": 10000 }, "type": "http" }

{ "example": { "asOf": "2026-10-11T14:44:09.099Z", "casKt": 150, "degraded": false, "densityRatio": 0.739, "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "equivalentAirspeedKt": 149.57, "mach": 0.2727, "notChecked": [ "indicated-to-calibrated correction: enter CAS, not raw IAS (the flight manual lists position error)", "ram-rise: at high speed the probe reads warmer than the static air, so enter the static temperature (total air temperature must be corrected)", "…2 more" ], "pressureAltitudeFt": 10000, "reasons": [ "Calibrated airspeed is converted through the dynamic pressure it represents (isentropic flow, so compressibility is included), then TAS = Mach x speed of sound at the actual temperature.", "Actual temperature used for the speed of sound and density." ], "ruleOfThumbTasKt": 180, "source": "computed locally", "speedOfSoundKt": 638.1, "summary": "150 kt calibrated at 10000 ft and -5 C is 174 kt true airspeed (Mach 0.273); the 2%-per-1000-ft rule gives 180 kt.", "tasKt": 173.99, "tasMinusCasKt": 23.99, "temperatureC": -5, "verdict": "COMPUTED" }, "type": "json" }