public double CalculateIAS()
{
double pressureRatio = FARAeroUtil.RayleighPitotTubeStagPressure(_vessel.mach); //stag pressure at pitot tube face / ambient pressure
double velocity = pressureRatio - 1;
velocity *= _vessel.staticPressurekPa * 1000 * 2;
velocity /= 1.225;
velocity = Math.Sqrt(velocity);
return(velocity);
}
public double CalculateIAS()
{
// Rodhern: Presumably _vessel.mach ignores FARWind, which might not be the intended behaviour.
double pressureRatio = FARAeroUtil.RayleighPitotTubeStagPressure(_vessel.mach); //stag pressure at pitot tube face / ambient pressure
double velocity = pressureRatio - 1;
velocity *= _vessel.staticPressurekPa * 1000 * 2;
velocity /= 1.225;
velocity = Math.Sqrt(velocity);
return(velocity);
}
public double CalculateIAS()
{
//stag pressure at pitot tube face / ambient pressure
double pressureRatio = FARAeroUtil.RayleighPitotTubeStagPressure(_vessel.mach);
double velocity = pressureRatio - 1;
velocity *= FARAtmosphere.GetPressure(_vessel) * 2;
velocity /= 1.225;
velocity = Math.Sqrt(velocity);
return(velocity);
}
public void ChangeSurfVelocity()
{
active = false;
//DaMichel: Avoid conflict between multiple vessels in physics range. We only want to show the speed of the active vessel.
if (FlightGlobals.ActiveVessel != _vessel)
{
return;
}
//DaMichel: Keep our fingers off of this also if there is no atmosphere (staticPressure <= 0)
if (FlightGlobals.speedDisplayMode != FlightGlobals.SpeedDisplayModes.Surface || _vessel.atmDensity <= 0)
{
return;
}
if (SpeedDisplay.Instance == null)
{
return;
}
double unitConversion = 1;
string unitString;// = "m/s";
string caption;
if (unitMode == SurfaceVelUnit.KNOTS)
{
unitConversion = 1.943844492440604768413343347219;
unitString = surfUnit_str[1];
}
else if (unitMode == SurfaceVelUnit.KM_H)
{
unitConversion = 3.6;
unitString = surfUnit_str[3];
}
else if (unitMode == SurfaceVelUnit.MPH)
{
unitConversion = 2.236936;
unitString = surfUnit_str[2];
}
else
{
unitString = surfUnit_str[0];
}
if (velMode == SurfaceVelMode.TAS)
{
caption = surfModel_str[0];
velString = (_vessel.srfSpeed * unitConversion).ToString("F1") + unitString;
}
else
{
if (velMode == SurfaceVelMode.IAS)
{
caption = surfModel_str[1];
//double densityRatio = (FARAeroUtil.GetCurrentDensity(_vessel) / 1.225);
double pressureRatio = FARAeroUtil.RayleighPitotTubeStagPressure(_vessel.mach); //stag pressure at pitot tube face / ambient pressure
double velocity = pressureRatio - 1;
velocity *= _vessel.staticPressurekPa * 1000 * 2;
velocity /= 1.225;
velocity = Math.Sqrt(velocity);
velString = (velocity * unitConversion).ToString("F1") + unitString;
}
else if (velMode == SurfaceVelMode.EAS)
{
caption = surfModel_str[2];
double densityRatio = (FARAeroUtil.GetCurrentDensity(_vessel) / 1.225);
velString = (_vessel.srfSpeed * Math.Sqrt(densityRatio) * unitConversion).ToString("F1") + unitString;
}
else// if (velMode == SurfaceVelMode.MACH)
{
caption = surfModel_str[3];
velString = _vessel.mach.ToString("F3");
}
}
active = true;
SpeedDisplay UI = SpeedDisplay.Instance;
if (UI.textSpeed == null || UI.textTitle == null)
{
return;
}
UI.textTitle.text = caption;
UI.textSpeed.text = velString;
}
