so while the dust settles I am tinkering with my TX setup - running Open TX is pretty cool and there is always something to improve and endless possibilities to try - as some of you may know I have a generic setup on the radio (a default setting if you like), and by holding the ail/ele stick in various positions and hitting a switch I introduce more modes (like DLG launch, or slope soaring rates) - this is working well.
for the DLG in particular, the flaperon servos sit above centre with the TE's aligned to the root TE to have minimal up travel, and heaps of down travel for the brakes - I have to be honest and say this was a bit of a challenge and none of the standard flaperon settings/tutorials seem to explain properly how to do it - so I have worked on two ways that I will fine test/tune on the DLG.
both setups use curves to match the max/min throws in the outputs window - that will ensure the servos are never over driven - at this point with the servos centred the TE's of the flaperons will droop slightly below the root TE - both setups also use a curve for the brakes on the throttle stick to drive them from zero to max down with a bit of wiggle room for aileron control when braking - my servos are only using 80% of their travel in each direction.
setup 1 - uses 80% weight and 20% offset (the 20% offset makes the FLAPPERON TEs align with the root TE) and DIFFERENTIAL is applied via Gvars in their respective flight modes - the throttle weight is 120% to account for the 20% servo centre offset - you can see in the images that the flaperons in CRUISE are 16% up (16/80 max throw = 20% offset) - you can see in THERMAL mode they are cambered down 6% with 2% ELEVATOR compensation - can see in the final image with full right AILERON the left side is drooping less with the DIFFERENTIAL.
All these settings will be tweaked on the model, but the theory seems to be working.
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setup 2 - uses essentially the same setup but for the AILERON and DIFFERENTIAL settings I am using curves - you can see the curve in CRUISE mode (AiC) has the centre +20 and the left aileron drooping less with full right AILERON - you can also see the in SPEED mode (AiS) there is no difference in aileron travel - in this way the curves can accurately control the position and differential.
each curve is triggered in its respective flight mode (speed, cruise, thermal) - note that the CRUISE mode is also used for the LAUNCH modes.
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one other thing I am trying is using a stepped curve in the CALIBRATION of the FLAPERONS - the idea is that the throttle stick is the INPUT and INDEXED to -100/-50/0/50/100 which (in theory) will snap the FLAPERONS through 5 points of travel - given the THROTTLE stick is unsprung the stick position is maintained allowing you to focus on trimming the FLAPPERON servo curves - we shall see!