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Implementing VNAV support in FlightGear: Difference between revisions
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Implementing VNAV support in FlightGear (view source)
Revision as of 17:21, 1 December 2013
, 1 December 2013→Background
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== Background == | == Background == | ||
{{cquote|Altitude constraints are a mess - in the short term, they are best avoided. Keep in mind the GPS code doesn't really do proper vertical | {{cquote|Altitude constraints are a mess - in the short term, they are best avoided. Keep in mind the GPS code doesn't really do proper vertical navigation - it computes some data like the altitude change and climb/ descent rate for a leg, but I'm not sure if any real aircraft is driving the VNAV mode of an autopilot from it. | ||
navigation - it computes some data like the altitude change and climb/ descent rate for a leg, but I'm not sure if any real aircraft is | |||
driving the VNAV mode of an autopilot from it. | |||
It's definitely something I will look at, but it's tied up with some other features. At some point I want to support GPS precision | It's definitely something I will look at, but it's tied up with some other features. At some point I want to support GPS precision approaches and then obviously all the VNAV logic will need to be properly cleaned up - right now it's been copied mostly unchanged from the original gps code. | ||
approaches and then obviously all the VNAV logic will need to be properly cleaned up - right now it's been copied mostly unchanged from | |||
the original gps code. | |||
As always, user stories are good - what do you expect the behaviour to be from the route-manager? Just to track valid altitudes? For the | As always, user stories are good - what do you expect the behaviour to be from the route-manager? Just to track valid altitudes? For the autopilot VNAV to follow the altitude profile exactly? Something in between? | ||
autopilot VNAV to follow the altitude profile exactly? Something in between? | |||
This is also tied up with accurate enroute time calculations and calculating top-of-climb / top-of-descent information, it's quite a | This is also tied up with accurate enroute time calculations and calculating top-of-climb / top-of-descent information, it's quite a | ||