fgdata/Aircraft/c172p/Tutorials/taxiing.xml

<?xml version="1.0"?>

<PropertyList>

    <name>Taxiing</name>

    <description>
    This tutorial covers moving the aircraft around on the ground, from the parking position to the run-up area.

For more information on taxiing, see Section 2-9 of the FAA Airplane Flying Handbook available at http://www.faa.gov/library/manuals/aircraft/airplane_handbook/.
    </description>

    <audio-dir>Tutorials/taxiing</audio-dir>
    <timeofday>morning</timeofday>
    <presets>
        <airport-id>KLVK</airport-id>
        <on-ground>1</on-ground>
        <runway>12</runway>
        <altitude-ft>-9999</altitude-ft>
        <latitude-deg>37.6952</latitude-deg>
        <longitude-deg>-121.8167</longitude-deg>
        <heading-deg>175.0</heading-deg>
        <airspeed-kt>0</airspeed-kt>
        <glideslope-deg>0</glideslope-deg>
        <offset-azimuth-deg>0</offset-azimuth-deg>
        <offset-distance-nm>0</offset-distance-nm>
    </presets>

    <targets>
        <j1>
            <!-- Turn right onto taxiway -->
            <longitude-deg>-121.81664</longitude-deg>
            <latitude-deg>37.6949</latitude-deg>
        </j1>
        <j2>
            <!-- Mention differential braking -->
            <longitude-deg>-121.82258</longitude-deg>
            <latitude-deg>37.6949</latitude-deg>
        </j2>
        <j3>
            <!-- Left turn in taxiway -->
            <longitude-deg>-121.8250</longitude-deg>
            <latitude-deg>37.69498</latitude-deg>
        </j3>
        <a1>
            <!-- Right turn onto taxiway A -->
            <longitude-deg>-121.8251</longitude-deg>
            <latitude-deg>37.694616</latitude-deg>
        </a1>
        <a2>
            <!-- Runup aread -->
            <longitude-deg>-121.8294</longitude-deg>
            <latitude-deg>37.69459</latitude-deg>
        </a2>
    </targets>

    <init>
        <set>
            <property>/sim/model/c172p/brake-parking</property>
            <value>1</value>
        </set>
        <set>
            <property>/controls/flight/flaps</property>
            <value>0.0</value>
        </set>
        <set>
            <property>/controls/switches/magnetos</property>
            <value>3</value>
        </set>
        <set>
            <property>/controls/engines/current-engine/throttle</property>
            <value>0.2</value>
        </set>
        <set>
            <property>/controls/switches/starter</property>
            <value>true</value>
        </set>
        <set>
            <property>/instrumentation/adf/frequencies/selected-khz</property>
            <value>340</value>
        </set>
        <set>
            <property>/environment/weather-scenario</property>
            <value>Fair weather</value>
        </set>
        <set>
            <property>/controls/flight/elevator-trim</property>
            <value>0.17</value>
        </set>
    </init>

    <step>
        <message>In this lesson we'll taxi the aircraft from its parking position infront of the FBO,
       along taxiways Juliet and Alpha to the run-up area near runway 07L.</message>
        <nasal>
            <script>
                # Script to simulate holding down the starter button until the engine starts
                var starter = func() {
                setprop("/controls/switches/starter", 1);
                if (!getprop("/engines/active-engine/running")) {
                    settimer(starter, 0);
                }
            };

            # The FDM resets the starter property on each FDM cycle.  By effectively starting
            # a number of threads to continually keep setting the starter to true, we can
            # get around this and give the engine the opportunity to catch.
            starter();
            starter();
            starter();
            starter();
            starter();
            </script>
        </nasal>
    </step>

    <step>
        <set>
            <property>/controls/switches/starter</property>
            <value>false</value>
        </set>
        <message>I've already started the engine. Press Shift-B to release the parking brake. Throttle up to about
      20% to move forward slightly, then hold b to check that the normal brakes work.</message>

        <error>
            <message>The parking brake is still on. Release it by pressing Shift-B.</message>
            <condition>
                <equals>
                    <property>/sim/model/c172p/brake-parking</property>
                    <value>1</value>
                </equals>
            </condition>
        </error>
        <error>
            <message>Throttle up to about 20% to move forward slightly.</message>
            <condition>
                <and>
                    <equals>
                        <property>/sim/model/c172p/brake-parking</property>
                        <value>0</value>
                    </equals>
                    <less-than>
                        <property>/controls/engines/current-engine/throttle</property>
                        <value>0.15</value>
                    </less-than>
                </and>
            </condition>
        </error>
        <error>
            <message>Apply the brakes by pressing b.</message>
            <condition>
                <and>
                    <equals>
                        <property>/sim/model/c172p/brake-parking</property>
                        <value>0</value>
                    </equals>
                    <equals>
                        <property>/controls/gear/brake-left</property>
                        <value>0</value>
                    </equals>
                    <equals>
                        <property>/controls/gear/brake-left</property>
                        <value>0</value>
                    </equals>
                </and>
            </condition>
        </error>

        <exit>
            <condition>
                <and>
                    <equals>
                        <property>/sim/model/c172p/brake-parking</property>
                        <value>0</value>
                    </equals>
                    <equals>
                        <property>/controls/gear/brake-left</property>
                        <value>1</value>
                    </equals>
                    <equals>
                        <property>/controls/gear/brake-left</property>
                        <value>1</value>
                    </equals>
                </and>
            </condition>
        </exit>
    </step>

    <step>
        <message>Keep applying the brakes. You can steer the aircraft on the ground by either using 0/Enter on the
      numeric keypad, or using the mouse in yoke mode (+) with the left mouse button held down. If you need to slow
      down, just press b to apply the brakes.</message>
        <wait>10</wait>

        <error>
            <message>Keep the brakes on until I tell you to start taxiing.</message>
            <condition>
                <or>
                    <equals>
                        <property>/controls/gear/brake-left</property>
                        <value>0</value>
                    </equals>
                    <equals>
                        <property>/controls/gear/brake-left</property>
                        <value>0</value>
                    </equals>
                </or>
            </condition>
        </error>
    </step>

    <step>
        <message>Release the brakes and taxi forwards.  You may need to apply a little throttle to get going. Make a right turn onto taxiway Juliet.</message>
        <wait>5</wait>

        <error>
            <message>That's left, not right.</message>
            <condition>
                <or>
                    <less-than>
                        <property>/sim/tutorials/targets/j2/direction-deg</property>
                        <value>-135.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/j2/direction-deg</property>
                        <value>135.0</value>
                    </greater-than>
                </or>
            </condition>
        </error>
        <error>
            <message>Apply a little throttle to get going, but then reduce it once you're moving.</message>
            <condition>
                <less-than>
                    <property>/velocities/groundspeed-kt</property>
                    <value>1.0</value>
                </less-than>
            </condition>
        </error>

        <exit>
            <condition>
                <and>
                    <less-than>
                        <property>/sim/tutorials/targets/j2/direction-deg</property>
                        <value>20.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/j2/direction-deg</property>
                        <value>-20.0</value>
                    </greater-than>
                </and>
            </condition>
        </exit>
    </step>

    <step>
        <message>Continue taxiing along taxiway Juliet. Keep the nosewheel on the yellow line. Don't allow the aircraft to go too fast - use b to brake if you need to. </message>

        <error>
            <message>
        You're straying off the taxiway. Keep heading on taxiway Juliet, keeping your nosewheel on the yellow line.
            </message>
            <condition>
                <or>
                    <less-than>
                        <property>/sim/tutorials/targets/j2/direction-deg</property>
                        <value>-20.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/j2/direction-deg</property>
                        <value>20.0</value>
                    </greater-than>
                </or>
            </condition>
        </error>
        <error>
            <message>You're going too fast.  Reduce your throttle slightly and apply your brakes.</message>
            <condition>
                <greater-than>
                    <property>/velocities/groundspeed-kt</property>
                    <value>10.0</value>
                </greater-than>
            </condition>
        </error>

        <exit>
            <condition>
                <less-than>
                    <property>/sim/tutorials/targets/j2/distance-m</property>
                    <value>150.0</value>
                </less-than>
            </condition>
        </exit>
    </step>
    <step>
        <message>If you need to turn very tightly, you can apply differential braking, and only brake one wheel, by pressing ',' for the left, or '.' for the right.</message>

        <error>
            <message>
        You're straying off the taxiway. Keep your nosewheel on the yellow line.
            </message>
            <condition>
                <or>
                    <less-than>
                        <property>/sim/tutorials/targets/j3/direction-deg</property>
                        <value>-20.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/j3/direction-deg</property>
                        <value>20.0</value>
                    </greater-than>
                </or>
            </condition>
        </error>
        <error>
            <message>You're going too fast.  Reduce your throttle slightly and apply your brakes.</message>
            <condition>
                <greater-than>
                    <property>/velocities/groundspeed-kt</property>
                    <value>10.0</value>
                </greater-than>
            </condition>
        </error>

        <exit>
            <condition>
                <less-than>
                    <property>/sim/tutorials/targets/j3/distance-m</property>
                    <value>100.0</value>
                </less-than>
            </condition>
        </exit>
    </step>
    <step>
        <message>The taxiway turns left here. Slow down by applying some brakes (b) and follow it round.</message>
        <error>
            <message>You're straying off the taxiway. Turn left.</message>
            <condition>
                <or>
                    <less-than>
                        <property>/sim/tutorials/targets/a1/direction-deg</property>
                        <value>-45.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/a1/direction-deg</property>
                        <value>45.0</value>
                    </greater-than>
                </or>
            </condition>
        </error>

        <exit>
            <condition>
                <less-than>
                    <property>/sim/tutorials/targets/a1/distance-m</property>
                    <value>25.0</value>
                </less-than>
            </condition>
        </exit>
    </step>

    <step>
        <message>We're now at the intersection of taxiways Juliet, Golf and Alpha. Turn right onto taxiway Alpha.</message>
        <error>
            <message>That's left, not right.</message>
            <condition>
                <or>
                    <less-than>
                        <property>/sim/tutorials/targets/a2/direction-deg</property>
                        <value>-135.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/a2/direction-deg</property>
                        <value>135.0</value>
                    </greater-than>
                </or>
            </condition>
        </error>

        <exit>
            <condition>
                <and>
                    <less-than>
                        <property>/sim/tutorials/targets/a2/direction-deg</property>
                        <value>20.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/a2/direction-deg</property>
                        <value>-20.0</value>
                    </greater-than>
                </and>
            </condition>
        </exit>
    </step>

    <step>
        <message>Continue taxiing along taxiway Alpha to the end of the taxiway. </message>

        <error>
            <message>
        You're straying off the taxiway. Keep heading on taxiway Alpha, keeping your nosewheel on the yellow line.
            </message>
            <condition>
                <or>
                    <less-than>
                        <property>/sim/tutorials/targets/a2/direction-deg</property>
                        <value>-15.0</value>
                    </less-than>
                    <greater-than>
                        <property>/sim/tutorials/targets/a2/direction-deg</property>
                        <value>15.0</value>
                    </greater-than>
                </or>
            </condition>
        </error>

        <exit>
            <condition>
                <less-than>
                    <property>/sim/tutorials/targets/a2/distance-m</property>
                    <value>60.0</value>
                </less-than>
            </condition>
        </exit>
    </step>

    <step>
        <message>We've reached the run-up area. Brake slowly to a stop and set the parking brake (shift-b).</message>
        <exit>
            <condition>
                <equals>
                    <property>/sim/model/c172p/brake-parking</property>
                    <value>1</value>
                </equals>
            </condition>
        </exit>
    </step>

    <end>
        <message>We've reached the run-up area. Well done.</message>
    </end>

</PropertyList>