83 lines
3 KiB
Text
83 lines
3 KiB
Text
The airspeed indicator can be initialized in an instrumentation.xml file.
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If not specified, the generic indicator will be loaded
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from the Aircraft/Generic/generic-instrumentation.xml.
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The normal setup is :
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<airspeed-indicator>
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<name>airspeed-indicator</name>
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<number>0</number>
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<total-pressure>/systems/pitot/total-pressure-inhg</total-pressure>
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<static-pressure>/systems/static/pressure-inhg</static-pressure>
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<has-overspeed-indicator>1</has-overspeed-indicator>
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</airspeed-indicator>
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Of course the total and static pressure may be sourced from any other
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pitot and static system when defined:
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<airspeed-indicator>
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<name>airspeed-indicator</name>
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<number>1</number>
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<total-pressure>/systems/pitot[1]/total-pressure-inhg</total-pressure>
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<static-pressure>/systems/static[1]/pressure-inhg</static-pressure>
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<has-overspeed-indicator>0</has-overspeed-indicator>
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</airspeed-indicator>
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Note that the Aircraft/Generic/generic-systems.xml only initiates one
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pitot and one static system, see also README.systems
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<total-pressure> is optional --- defaults to "/systems/pitot/total-pressure-inhg"
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For supersonic aircraft with an airspeed indicator NOT compensating for
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a shockwave in front of the pitot tube (most probably the case), use:
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<total-pressure>/systems/pitot/measured-total-pressure-inhg</total-pressure>
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<static-pressure> is optional --- defaults to "/systems/static/pressure-inhg"
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<has-overspeed-indicator> is optional --- defaults to 0 / off
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The <has-overspeed-indicator> provides a property for "barber-pole" animation,
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and is set to 0 / false by default ,
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If enabled , these properties should be added in the aircraft -set file,
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with that aircraft's correct figures.
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<airspeed-indicator>
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<ias-limit>248.0</ias-limit>
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<mach-limit>0.48</mach-limit>
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<alt-threshold>13200.0</alt-threshold>
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</airspeed-indicator>
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The default values are for a Beechcraft B1900D .
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<ias-limit> is the aircraft's VNE (never exceed speed) in KIAS
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<mach-limit> Mach speed limit.
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<alt-threshold> altitude at which these figures were calculated.
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Note : <mach-limit> is the mach limit at <alt-threshold>
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This was designed for indicated airspeed limits, but could probably be extended
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for mach limits.
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To initiate additional airspeed indicators, add in your instrumentation
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file (for airspeed indicator index 1):
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<airspeed-indicator>
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<name>airspeed-indicator</name>
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<number>1</number>
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<total-pressure>/systems/pitot[1]/total-pressure-inhg</total-pressure>
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<static-pressure>/systems/static[1]/pressure-inhg</static-pressure>
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<has-overspeed-indicator>0</has-overspeed-indicator>
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</airspeed-indicator>
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Note: this airspeed indicator sources its pressures from the second
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pitot and static system (with index 1).
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and in the aircraft -set file:
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<airspeed-indicator n="1">
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<serviceable type="bool" archive="y">true</serviceable>
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</airspeed-indicator>
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And if "has-overspeed-indicator" = 1, the appropriate limits as explained
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above in the airspeed-indicator brackets.
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