public static double DistanceLimitedAltitude(this FuelDataItem item,
double distance, double grossWt)
{
var c = item.ClimbGradient(grossWt);
var d = item.DescentGradient(grossWt);
return(distance * NmFtRatio * c * d / (c + d));
}
/// <exception cref="ArgumentException">Invalid vertical mode.</exception>
private double ClimbGradient(double grossWt, VerticalMode mode)
{
switch (mode)
{
case VerticalMode.Climb:
return(fuelData.ClimbGradient(grossWt));
case VerticalMode.Cruise:
return(0.0);
case VerticalMode.Descent:
return(-fuelData.DescentGradient(grossWt));
default:
throw new ArgumentException();
}
}
