Implement fly-by fixes and turn anticipation #183
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zlsa
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Sep 22, 2015
Implement fly-by fixes and turn anticipation
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👍 Wow man, very very nice work!!!! |
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When navigating from fix to fix, the current physics rules fly the aircraft within 0.5 km of one fix before turning to the next. When larger direction changes are required, aircraft will often anticipate the turn and “fly by” the waypoint rather than flying close to the fix, particularly when larger changes of direction are required. This avoids overshoot of the fix. See #174, /cc @nielsvdweide.
For aircraft navigating between two fixes, this change calculates the turn initiation distance as an aircraft FMC would, and starts the turn to the next fix at that point (to a maximum distance of 10km from the fix).
For course changes of < 20 degrees at 200 knots, there is no noticeable change since the turn initiation distance is small. At 90 degrees/200 knots, the turn starts 2.4km from the fix and increases from there for sharper turns.