I am quite expert at aerodynamics having done a lot of that for FSX and I can say this is really a necessity in order to properly mod physics in script.

also it is the rotational equivalent of setVelocity so I think it has really been forgotten atm...

I can provide several examples of use if needed...

this is also related to the other request http://feedback.arma3.com/view.php?id=15211

in order to control vehicle physics from script you should be able to set velocity and rotation in model space, you could use setVelocity but thir requires a matrix transformation on the script, whereas setvelocity in modelspace could be sent to Physx as it is a supported command.

this is correct if you work on a land vehicle (yaw), but in an air vehicle such as an helicopter you must also factor pitch and roll.. so the vertical component of velocities and there it becomes complicated...