EAS_to_TAS: Convert Equivalent Airspeed to True Airspeed

In peconeto/safetydata: Aviation Safety Analytical Tools

Description

Function to convert aircraft's equivalent airspeed (EAS) to true airspeed (TAS). TAS is equal to EAS adjusted for non-standard atmospheric pressure and temperature. For modern commercial aircraft that opearte below the speed of sound, indicated airspeed (IAS) and EAS are practically equal to each other. They may be used interchangeably in the context of measuring aircraft speeds within these assuptions.

Usage

EAS_to_TAS(EAS_kts, Altimeter_inHg = 29.92, Temp_C = 15)

Arguments

EAS_kts	Equivalent airspeed in knots
Altimeter_inHg	Local altimeter setting measured as inches of mercury, defaults to 29.92 (ICAO standard atmosphere)
Temp_C	Local outside air temperature in degrees Celcius, defaults to 15 (ICAO standard temperature)

Value

True airspeed in knots

Source

US Navy, FAA (1965-01-02) Aerodynamics for Naval Aviators (NAVAIR/NAVWEPS 00-80T-80) https://www.faa.gov/regulations_policies/handbooks_manuals/aviation/

NACA, ICAO, NASA (Published 1954-05-01, Acquired 1996-09-01) Manual of the ICAO standard atmosphere calculations by the NACA (NASA Technical Reports Server Document ID 19930083952) https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930083952.pdf

See Also

TAS_to_GS

Examples

EAS_to_TAS(EAS_kts = 100, Altimeter_inHg = 29.80, Temp_C = 35)
EAS_to_TAS(EAS_kts = 100) # At standard temperature and pressure, EAS is almost exactly the same as TAS

peconeto/safetydata documentation built on May 24, 2019, 6:14 a.m.