58
edits
Starting in the Air: Difference between revisions
Jump to navigation
Jump to search
Added section on setting up an approach
mNo edit summary |
(Added section on setting up an approach) |
||
| Line 13: | Line 13: | ||
Note that you do not have to be flying towards the reference point: you can pick any heading you want. | Note that you do not have to be flying towards the reference point: you can pick any heading you want. | ||
==Setting up an approach== | |||
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. You will normally intercept the localiser first, hold altitude until the glideslope comes down, then reduce power to stay on the glideslope. Here are the steps to set up in the air for the ILS 32 approach into Ottawa (CYOW): | |||
# Determine the final approach fix (in this case, the Greeley NDB, YRR) and the glidepath crossing altitude (1,800 ft MSL) | |||
# Determine the magnetic heading for the approach path (320°), then adjust by the magnetic variation (-14°) to get the true heading (306°) | |||
# choose a starting altitude 500–1,000 ft above the crossing altitude (2,500 ft) | |||
# choose an appropriate approach speed for your aircraft (90 kt for the Piper Warrior or Cessna 172, though in real life, you might push it to 110 kt at a busy airport) | |||
# choose an offset azimuth angle from the final approach fix that is 10° greater or lesser than the approach path (316°) | |||
# choose a true heading that is 30° greater or lesser than the approach path, in the same direction as the azimuth angle (336°) | |||
# preset your frequencies (110.3 mhz for the ILS 32 localiser; 377 khz for the Greeley NDB) | |||
Resulting command line (using the Warrior II, which launches with the engine running by default): | |||
fgfs --aircraft=pa28-161 --prop:/controls/engines/engine/throttle=0.7 --ndb=YRR \ | |||
--altitude=2500 --offset-azimuth=316 --heading=336 --nav1=320:110.3 --dme=nav1 --adf=377 --offset-distance=5 --vc=90 | |||
Be prepared to make rapid throttle and trim adjustments on startup. Fly straight and level until the LOC needle comes alive, then turn left on intercept; maintain 2,500 ft until the GS needle comes alive, then reduce power to keep it centred. Decision height is 571 ft. | |||
[[Category:FlightGear feature]] | [[Category:FlightGear feature]] | ||