1The airspeed indicator can be initialized in an instrumentation.xml file.
2If not specified, the generic indicator will be loaded
3from the Aircraft/Generic/generic-instrumentation.xml.
4
5The normal setup is :
6
7  <airspeed-indicator>
8    <name>airspeed-indicator</name>
9    <number>0</number>
10    <total-pressure>/systems/pitot/total-pressure-inhg</total-pressure>
11    <static-pressure>/systems/static/pressure-inhg</static-pressure>
12    <has-overspeed-indicator>1</has-overspeed-indicator>
13  </airspeed-indicator>
14
15Of course the total and static pressure may be sourced from any other
16pitot and static system when defined:
17
18  <airspeed-indicator>
19    <name>airspeed-indicator</name>
20    <number>1</number>
21    <total-pressure>/systems/pitot[1]/total-pressure-inhg</total-pressure>
22    <static-pressure>/systems/static[1]/pressure-inhg</static-pressure>
23    <has-overspeed-indicator>0</has-overspeed-indicator>
24  </airspeed-indicator>
25
26Note that the Aircraft/Generic/generic-systems.xml only initiates one
27pitot and one static system, see also README.systems
28
29<total-pressure> is optional --- defaults to "/systems/pitot/total-pressure-inhg"
30For supersonic aircraft with an airspeed indicator NOT compensating for
31a shockwave in front of the pitot tube (most probably the case), use:
32<total-pressure>/systems/pitot/measured-total-pressure-inhg</total-pressure>
33
34<static-pressure> is optional --- defaults to "/systems/static/pressure-inhg"
35<has-overspeed-indicator> is optional --- defaults to 0 / off
36
37The <has-overspeed-indicator> provides a property for "barber-pole" animation,
38 and is set to 0 / false by default ,
39
40If enabled , these properties should be added in the aircraft -set file,
41with that aircraft's correct figures.
42
43    <airspeed-indicator>
44        <ias-limit>248.0</ias-limit>
45        <mach-limit>0.48</mach-limit>
46        <alt-threshold>13200.0</alt-threshold>
47    </airspeed-indicator>
48
49
50The default values are for a Beechcraft B1900D .
51
52<ias-limit> is the aircraft's VNE (never exceed speed) in KIAS
53
54<mach-limit> Mach speed limit.
55
56<alt-threshold> altitude at which these figures were calculated.
57
58Note : <mach-limit> is the mach limit at <alt-threshold>
59This was designed for indicated airspeed limits, but could probably be extended
60for mach limits.
61
62
63To initiate additional airspeed indicators, add in your instrumentation
64file (for airspeed indicator index 1):
65
66  <airspeed-indicator>
67    <name>airspeed-indicator</name>
68    <number>1</number>
69    <total-pressure>/systems/pitot[1]/total-pressure-inhg</total-pressure>
70    <static-pressure>/systems/static[1]/pressure-inhg</static-pressure>
71    <has-overspeed-indicator>0</has-overspeed-indicator>
72  </airspeed-indicator>
73
74Note: this airspeed indicator sources its pressures from the second
75pitot and static system (with index 1).
76and in the aircraft -set file:
77
78    <airspeed-indicator n="1">
79	  <serviceable type="bool" archive="y">true</serviceable>
80    </airspeed-indicator>
81
82And if "has-overspeed-indicator" = 1, the appropriate limits as explained
83above in the airspeed-indicator brackets.
84