private void CMB_aircraft_SelectedIndexChanged(object sender, EventArgs e)
{
if (aircrafts.ContainsKey(CMB_aircraft.Text))
{
aircraftinfo aircraft = aircrafts[CMB_aircraft.Text];
NUM_maxspd.Value = (decimal)aircraft.maxvel;
NUM_minspd.Value = (decimal)aircraft.minvel;
TBAR_zoom.Minimum = (int)aircraft.minalt;
TBAR_zoom.Maximum = (int)aircraft.maxalt;
}
doCalc();
}