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→Setting the weather
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The next step is to configure weather. In reality, you would take a look at the weather and decide what is possible to do with a glider. In Flightgear, it is possible to choose the weather based on what you would like to do. Dependent on the weather system used, the steps are a bit different. In general, it is recommended to use Advanced Weather for glider flights. | The next step is to configure weather. In reality, you would take a look at the weather and decide what is possible to do with a glider. In Flightgear, it is possible to choose the weather based on what you would like to do. Dependent on the weather system used, the steps are a bit different. In general, it is recommended to use Advanced Weather for glider flights. | ||
==== Basic | ==== Basic Weather ==== | ||
[[File:Pinzgauer.jpg|thumb|270px|[[Schleicher ASK 21]] gliding in the [[Pinzgauer Spaziergang]] thermals scenario]] | [[File:Pinzgauer.jpg|thumb|270px|[[Schleicher ASK 21]] gliding in the [[Pinzgauer Spaziergang]] thermals scenario]] | ||
In Basic Weather, thermals and sinks can be used but must be defined individually in a thermal scenario file. To see how this is done it would be best to examine the file called <tt>[[$FG ROOT]]/AI/thermal_demo.xml</tt>, which sets up 11 thermals and 6 sinks around San Francisco Bay. To learn more about AI scenarios in general, see the related article called [[AI Systems]]. Note that the thermals and sinks exist independently of FlightGear's Basic Weather system, so it's possible to have cloud layers that don't match your thermal heights or thermals which do not move with the wind. To prevent this you may want to manually set the cloud layers to match your thermals and match AI-defined winds with the winds set in the weather. Also, cap clouds do not match the default clouds in shape. | In Basic Weather, thermals and sinks can be used but must be defined individually in a thermal scenario file. To see how this is done it would be best to examine the file called <tt>[[$FG ROOT]]/AI/thermal_demo.xml</tt>, which sets up 11 thermals and 6 sinks around San Francisco Bay. To learn more about AI scenarios in general, see the related article called [[AI Systems]]. Note that the thermals and sinks exist independently of FlightGear's Basic Weather system, so it's possible to have cloud layers that don't match your thermal heights or thermals which do not move with the wind. To prevent this you may want to manually set the cloud layers to match your thermals and match AI-defined winds with the winds set in the weather. Also, cap clouds do not match the default clouds in shape. | ||
If you'd like to discover the Austrian alpine region , you might want to read [[Pinzgauer Spaziergang]]. | If you'd like to discover the Austrian alpine region with AI thermals, you might want to read [[Pinzgauer Spaziergang]]. | ||
Ridge lift works well with Basic Weather. Typically winds should be chosen to be perpendicular to a slope between 10 and 20 kt for good ridge lift conditions. When using the wind layer interface, it is important to set not only the aloft winds but also the boundary layer winds to this value. This makes for a nasty landing, as the winds even close to touchdown in the valleys blow at full strength, but since ridge lift is only strong close to the terrain, a glider using ridge lift is almost always in the boundary layer zone, and if the boundary layer winds are reduced to get the landing conditions in the valleys right, ridge lift on the slopes collapses as well. | |||
=== Advanced Weather === | === Advanced Weather === | ||