<?xml version="1.0"?> <PropertyList> <fx> <engine> <name>left engine</name> <path>Sounds/exhaust_loop.wav</path> <mode>looped</mode> <condition> <not> <property>velocities/true-airspeed-kt</property> </not> </condition> <volume> <property>velocities/true-airspeed-kt</property> <factor>0.00167</factor> <min>0.05</min> </volume> <position> <x>0</x> <y>9.8</y> <z>-3</z> </position> <reference-dist>100.0</reference-dist> <max-dist>3000.0</max-dist> </engine> <engine> <name>right engine</name> <path>Sounds/exhaust_loop.wav</path> <mode>looped</mode> <condition> <not> <property>velocities/true-airspeed-kt</property> </not> </condition> <volume> <property>velocities/true-airspeed-kt</property> <factor>0.0016</factor> <min>0.05</min> </volume> <position> <x>0</x> <y>-9.8</y> <z>-3</z> </position> <reference-dist>100.0</reference-dist> <max-dist>3000.0</max-dist> </engine> </fx> </PropertyList>