Empties have a special usage in XPlane2Blender. Having no mesh and no material, they are a fast and easy way to group and animate other Blender Objects. Post 3.5, they are also the way to specify special types of objects, such as particle emitters. Being a Blender Object, they share all the characteristics with what is covered here.
Empty Special Type
||No special usage|
||Empties location and rotation will be used to emit particles in X-Plane|
||A planned but unimplemented feature to set X-Plane sound emitters|
Particle Emitter Settings
Emitter Name - A name from a .pss file that will be reference by the OBJ
Emitter Index - The index of that Emitter Name to use, if there is one. Leave as 0 if not specified.