//'''a wind generation object//'''
        public Wind(string windstring, double cross_section = 0.1)
        {
            self = this;

            string[] a = windstring.Split(',');
            if (Utils.len(a) != 3)
            {
                return;
                //raise RuntimeError("Expected wind in speed,direction,turbulance form, not %s" % windstring);
            }
            self.speed = float.Parse(a[0]); //# m/s
            self.direction = float.Parse(a[1]); //# direction the wind is going in
            self.turbulance = float.Parse(a[2]); //# turbulance factor (standard deviation)

            //# the cross-section of the aircraft to wind. This is multiplied by the
            //# difference in the wind and the velocity of the aircraft to give the acceleration
            self.cross_section = cross_section;

            //# the time constant for the turbulance - the average period of the
            //# changes over time
            self.turbulance_time_constant = 5.0;

            //# wind time record
            self.tlast = DateTime.Now;

            //# initial turbulance multiplier
            self.turbulance_mul = 1.0;
        }
Esempio n. 2
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 //# See http://en.wikipedia.org/wiki/Drag_equation
 //#
 //# Drag equation is F(a) = cl * p/2 * v^2 * a, where cl : drag coefficient
 //# (let's assume it's low, .e.g., 0.2), p : density of air (assume about 1
 //# kg/m^3, the density just over 1500m elevation), v : relative speed of wind
 //# (to the body), a : area acted on (this is captured by the cross_section
 //# paramter).
 //#
 //# So then we have
 //# F(a) = 0.2 * 1/2 * v^2 * cross_section = 0.1 * v^2 * cross_section
 public double drag_force(Wind wind, double sp)
 {
     return (Math.Pow(sp,2.0)) * 0.1 * wind.cross_section;
 }
Esempio n. 3
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//# See http://en.wikipedia.org/wiki/Drag_equation
//#
//# Drag equation is F(a) = cl * p/2 * v^2 * a, where cl : drag coefficient
//# (let's assume it's low, .e.g., 0.2), p : density of air (assume about 1
//# kg/m^3, the density just over 1500m elevation), v : relative speed of wind
//# (to the body), a : area acted on (this is captured by the cross_section
//# paramter).
//#
//# So then we have
//# F(a) = 0.2 * 1/2 * v^2 * cross_section = 0.1 * v^2 * cross_section
        public double drag_force(Wind wind, double sp)
        {
            return((Math.Pow(sp, 2.0)) * 0.1 * wind.cross_section);
        }