choose a starting altitude 500–1,000 ft above the crossing altitude (2,500 ft).Determine the magnetic heading for the approach path (320°), then adjust by the magnetic variation (-14°) to get the true heading (306°).Determine the final approach fix (in this case, the Greeley NDB, YRR) and the glidepath crossing altitude (1,800 ft MSL).Here are the steps to set up in the air for the ILS 32 approach into Ottawa (CYOW): You will normally intercept the localiser first, hold altitude until the glideslope comes down, then reduce power to stay on the glideslope. To set up an ILS approach realistically, you should start the plane in the air, outside the final approach fix, below the glideslope, on a 30° or 45° intercept. Note that you do not have to be flying towards the reference point: you can pick any heading you want. This command line starts at 5000 ft 5 statue miles to the east of the Oakland VOR:įgfs -altitude=5000 -heading=270 -vc=110 -vor=OAK -offset-distance=5 -offset-azimuth=270 You then use offset-distance to specify your distance from the starting point (in statute miles, which needs to be fixed), and offset-azimuth to specify the bearing to the reference point (again, in degrees true). In that case, you can specify the reference position using the normal airport, vor, ndb, or fix options. Often, you will want to start flying in a position relative to an airport, navaid, or intersection. Here's a simple command line to start flying true north at 110 kcas (typical cruise speed for a Warrior or Cessna C172) at 5000 ft northbound:įgfs -altitude=5000 -heading=0 -vc=110 You can also set the heading using the heading option, but note that the heading is in degrees true rather than degrees magnetic, so in some parts of North America it can be more than 30 degrees different than runway alignment. the calibrated airspeed, using the vc option (or alternately, the Mach number, using the mach option).the altitude in feet MSL, using the altitude option.To start FlightGear in the air, you need at a minimum to set the following:
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