Hi devs and all,
I am pondering how to make the best use of the Pixhawk with a X-8 flying wing that has been modified to have flaps/spoiler Surfaces between the elevons and Aircraft body. Admitted, the actual behaviour / usability of the flaps/spoilers yet remains to be evaluated… but I want to experiment.
(And look here, the FX-79 Buffalo flying wing comes with inner control surfaces pre-made… )
So I would like to set it up with elevons (New style elevon mixing EEPROM setup (ELEVON_OUTPUT option)) on the outer surfaces and flaps (/auto flaps/ spoilers/ flaperons / spoilerons) on the inner surfaces.
But Reading the current parameter documentation it appears like flaps (spoilers… etc…) cannot be used when the aircraft has elevons? Is this correct? Then why??
While I do understand it might be a problem to use the spoileron simultanously with elevons since they currently use the same MIXING_GAIN parameter, I still fail to see why ordinary flaps / spoilers (not flaperon / spoileron) could not be used.
Quotes:
param - FLAP_IN_CHANNEL: “…You must also enable a FLAPERON_OUTPUT flaperon mixer setting.”
param - FLAPERON_OUTPUT: “…FLAPERON_OUTPUT cannot be combined with ELEVON_OUTPUT or ELEVON_MIXING.”
relevant parameter descriptions here :
http://plane.ardupilot.com/wiki/arduplane-parameters/#Flap_input_channel_ArduPlaneFLAP_IN_CHANNEL
I have noticed that the flaperon/spoileron seems to be work in progress, so maybe Tridge has got some comments about this? 
http://ardupilot.com/forum/viewtopic.php?f=77&t=5441&p=8495&hilit=flap#p8495
/ Tom
