While actionmapper 0.2 is on it's the way to see release, to have fps-like controls in aero/vtol you can modify your "helicopter" actionmap section with the following values(if the actions mentioned aren't exist there, just add them):
<action name="v_rotateyaw">
<key name="joyaxis_x"/>
</action>
<action name="v_rotatepitch">
<key name="joyaxis_y"/>
</action>
<action name="v_rollleft" onPress="1" onRelease="1">
<key name="a"/>
</action>
<action name="v_rollright" onPress="1" onRelease="1">
<key name="d"/>
</action>
for joystick or
<action name="v_rotateyaw">
<key name="maxis_x"/>
</action>
<action name="v_rotatepitch">
<key name="maxis_y"/>
</action>
<action name="v_rollleft" onPress="1" onRelease="1">
<key name="a"/>
</action>
<action name="v_rollright" onPress="1" onRelease="1">
<key name="d"/>
</action>
for mouse.
Also make sure, that
<action name="v_rotateroll"> in "helicopter section" does not contain
<key name="joyaxis_x"/> or
<key name="maxis_x"/> P.S.: I want to thank Seraph for a very useful wiki article on
actionmaps and recommend it to anyone, interested in understanding how actionmaps work.
Edit: I tested this a bit on my PC and, strangely enough, it only allows to have both X and Y controls in inverted mode, regardless of "inv" being added to "maxis_" or "joyaxis_". Seems like fps-like controls for flying assets are a bit harder to achieve. I'll try get help from the devs on this issue.