Here is a rescue operation  animation.

=> 1/    You have to include the  model Rescue-Op.xml  at the right place on your model with 
        <model>
            <name>Rescue-Op</name>
            <path>your_path/Rescue-Op.xml</path>
            <offsets>
                    <x-m>N</x-m>
                    <y-m>N</y-m>
                    <z-m>N</z-m>
            </offsets>
        </model>
        
    
=> 2/     You may  include the  model  Rescue-Man.xml at the right place on your model with 
            <model>
            <name>Rescue-Man</name>
            <path>your_path/Rescue-Op.xml</path>
            <offsets>
                    <x-m>N</x-m>
                    <y-m>N</y-m>
                    <z-m>N</z-m>
            </offsets>
        </model>
        
        BEWARE: the offset value are the place of the object , with top of the rope under bottom of the winch.
        the rope has 10 meters lengh
        
=> 3/      Don't forget to  give the right initialization value to the property
                Here in the -set.xml file
            <sim>
                <model>
                    <rescue-lift>1</rescue-lift>
                    <rescue type="bool">false</rescue>
                </model>
            </sim/>       
        
        
        
=> 4/       The key to activate the process depends on your choice
                Here my choice (not the best)

<key n="114">
                                <name>r</name>
                                <desc>Toggle Rescue</desc>
                                <binding>
                                        <command>property-toggle</command>
                                        <property>/sim/model/rescue</property>
                                </binding>
                        </key>
                        <key n="109">
                                <name>m</name>
                                <desc>Lift Winch</desc>
                                <repeatable type="bool">true</repeatable>
                                <binding>
                                        <command>property-adjust</command>
                                        <property>/sim/model/rescue-lift</property>
                                        <step type="double">-0.01</step>
                                        <min>0.0</min>
                                        <max>1</max>
                                </binding>
                        </key>
                        <key n="77">
                                <name>M</name>
                                <desc>Down Winch</desc>
                                <repeatable type="bool">true</repeatable>
                                <binding>
                                        <command>property-adjust</command>
                                        <property>/sim/model/rescue-lift</property>
                                        <step type="double">0.01</step>
                                        <min>0.0</min>
                                        <max>1</max>
                                </binding>
                        </key>