Implementing VNAV support in FlightGear: Difference between revisions

Implementing VNAV support in FlightGear (view source)

No change in size , 2 December 2013

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 * VNAV automatically selects altitude targets and speed targets according to pilot MCP entries and the altitude and speed constraints in the FMS flightplan.
-* VNAV automatically selects pitch and thrust control modes to fly to the targets. For example during descent, VNAV chooses between a FLCH descent, a vertical
+* VNAV automatically selects pitch and thrust control modes to fly to the targets. For example during descent, VNAV chooses between a FLCH descent, a vertical speed (fixed rate-of descent), and an FMS path descent. In the case where VNAV selects vertical speed control mode, VNAV also selects the vertical speed target.
-speed (fixed rate-of descent), and an FMS path descent. In the case where VNAV selects vertical speed control mode, VNAV also selects the vertical speed target.
-* for the descent and approach, VNAV automatically provides an optimum path that is used as the reference for all automated altitude/speed target and control mode
+* for the descent and approach, VNAV automatically provides an optimum path that is used as the reference for all automated altitude/speed target and control mode selections.
-selections.
 In a study of the software of contemporary VNAV functions, Sherry & Polson (1999), found that the typical VNAV function automatically chooses the active altitude target from a possible list of sixteen, and chooses the active speed target from a possible list of twenty-six.