/engines/engine[%d]/rpm
/engines/engine[%d]/pitch
/engines/engine[%d]/torque
+
+
+================================================================================
+LIGHT
+================================================================================
+/sim/time/sun-angle-rad
+/rendering/scene/ambient/red
+/rendering/scene/ambient/ggreen
+/rendering/scene/ambient/blue
+/rendering/scene/diffuse/red
+/rendering/scene/diffuse/green
+/rendering/scene/diffuse/blue
+/rendering/scene/specular/red
+/rendering/scene/specular/green
+/rendering/scene/specular/blue