Finished adding in the preflight fuel calculations.

Author: zizwiz

myFlightInfo/SpeedTimeFuel.cs

@@ -18,7 +18,8 @@ private void btn_calc_speed_time_fuel_Click(object sender, EventArgs e)
             try
             {
                 if (SpeedDataCheck(txtbx_speed_wind_speed.Text, txtbx_speed_wind_direction.Text,
-                         txtbx_speed_course.Text, txtbx_speed_true_airspeed.Text))
+                         txtbx_speed_course.Text, txtbx_speed_true_airspeed.Text, 
+                         txtbx_speed_wind_pre_flight_running.Text, txtbx_speed_wind_return_pre_flight_running.Text))
                 {
                     bool TimeFuelFlag = TimeFuelCheck(txtbx_speed_distance.Text, txtbx_speed_fuel_consumption.Text,
                          txtbx_min_landing_fuel.Text, txtbx_speed_fuel_specific_gravity.Text);
@@ -178,7 +179,8 @@ private void btn_calc_speed_time_fuel_Click(object sender, EventArgs e)
         }
 
 
-        private bool SpeedDataCheck(string myWindStrength, string myDirection, string myCourse, string myAirspeed)
+        private bool SpeedDataCheck(string myWindStrength, string myDirection, string myCourse, string myAirspeed,
+        string mySpeed_wind_pre_flight_running, string mySpeed_wind_return_pre_flight_running)
         {
             //catch for incomplete data
             if (myCourse == "")
@@ -270,6 +272,25 @@ private bool SpeedDataCheck(string myWindStrength, string myDirection, string my
                     MessageBoxButtons.OK, MessageBoxIcon.Error);
                 return false;
             }
+            else if ((double.Parse(mySpeed_wind_pre_flight_running) < 0) || (double.Parse(mySpeed_wind_pre_flight_running) > 999))
+            {
+                MsgBox.Show("Check Pre-flight running Data is a valid number >0 and <999)", "Data out of scope",
+                    MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+            else if ((double.Parse(mySpeed_wind_return_pre_flight_running) < 0) || (double.Parse(mySpeed_wind_return_pre_flight_running) > 999))
+            {
+                MsgBox.Show("Check Return Pre-flight running Data is a valid number >0 and <999)", "Data out of scope",
+                    MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+
+            if (double.Parse(myAirspeed) < double.Parse(myWindStrength))
+            {
+                MsgBox.Show("Flying into a wind that is faster than your airspeed means you fly backwards, not advisable, best stay at home.", "Stay at Home",
+                    MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
 
             return true;
         }

myFlightInfo/crosswind/Speed_Time_Fuel.cs

@@ -37,12 +37,12 @@ The above equation is a simple vector addition of the true airspeed and wind spe
              * follows: ѱ = δ + ⍺
              */
 
-            if (!Double.TryParse(myTrueAirSpeed.Text, out double TrueAirspeed))
-            {
-                return (999, 999, 999, 999, 999, 999, 999);
-            }
+            //if (!double.TryParse(myTrueAirSpeed.Text, out double TrueAirspeed))
+            //{
+            //    return (999, 999, 999, 999, 999, 999, 999);
+            //}
 
-            //double TrueAirspeed = Double.Parse(myTrueAirSpeed.Text);
+            double TrueAirspeed = Double.Parse(myTrueAirSpeed.Text);
             double WindSpeed = Double.Parse(myWindSpeed.Text);
             double Course = Double.Parse(myCourse.Text);
             if (myReturnLeg) Course += 180;