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Added MACHNUMBER which returns mach number. #216

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Added MACHNUMBER which returns mach number. #216

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3b94d49
Added MACHNUMBER which returns mach number.
a1270 Nov 6, 2013
74ee203
Fix a typo and add explanation of teh calculation.
a1270 Nov 6, 2013
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2 changes: 2 additions & 0 deletions VesselTarget.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,8 @@ public override object GetSuffix(string suffixName)
if (suffixName == "APOAPSIS") return target.orbit.ApA;
if (suffixName == "PERIAPSIS") return target.orbit.PeA;
if (suffixName == "SENSOR") return new VesselSensors(target);
// airSpeed / (sqrt(gamma 1.4 * (temp at current altitude + zero Kelvin(273.15)) * 287 J/kg K)) gamma being heat exchange ratio of air
if (suffixName == "MACHNUMBER") return (double)target.srf_velocity.magnitude / (Math.Sqrt(1.4 * (FlightGlobals.getExternalTemperature((float)target.altitude, target.mainBody) + 273.15) * 287));

// Is this a resource?
double dblValue;
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