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I have had a look at Mike Shellim's F3F web site but have been unable to download his eepe file.
Perhaps you could e-mail the file.
I had my first flight this afternoon with Mikes F3F programme set up on my Taranis transmitter. I was testing it on one of my older models a Purbeck Assassin. The transition went fairly well.
I am not sure however how best to adjust the amount of [spoiler] compensation. I think I need some help here.
My next task is to do a better job of setting the flaps throws. I am planning to add a temporary mixer line that will replace the existing mixes. With the mix activated I will reset the end points so that both flaps have exactly the same travel. I will then switch off the temporary mixer and balance the mid travel flap positions by tweaking Curve3
MikeI have spent another hour this morning refining my settings. Hopefully if the current rain clears I will be able to test it out this afternoon.It may help future users of your eepe file if you could add some simple set up instructions on the accompanying excel file. To get the best out of your program it is important that the correct step by step sequence is followed. I have found out to my cost that you must make any adjustments at the correct point in the sequence.Thanks for all the support you have given. My knowledge and understanding have increased considerably with your assistance.Ian
It depends on how you have your mixes set. If you are using separate servo/s for flaps you could reduce the weight in the mix or reduce servo throw in the servo settings.Tom
I noticed that I have more down flap movement than up flap movement when the flaps are coupled to the ailerons. I am not sure where and how to adjust the differential/travel.
Ian, just to clarify re diff, there's one master diff setting, and that's GV2. GV1 is the same as GV2 but with diff suppression. GV1 is applied to ailerons, GV2 to flaps. If everything is behaving reasonably linearly, you should get the same amount of diff on both aileron and flaps. It could be that there's a problem either the geometry, or maybe the Limits settings, for flaps and/or ailerons. I know you've worked around the issue with your GV2 fix, but it may be worth checking that you've got a good linear setup on the flaps. In any case, a good excuse to document the setup procedure for the flaps:Reset the balancing curve for the right flap (set to to 45 degree line).Use your REPL trick so that the throttle stick 'passes thru' directly to the two flap servos without any mixers of trims. So now you can visualise your Limits adjustments!.Go to the Limits menuMake sure Limits->Sym is set to Off for the flap servosNow watch the flaps and set Limits->Min and Limits->Max to the 'never-exceed' end points, i.e the furthest they can move without making expensive noises. Do this for both flap servo servos, so the travel end points match. Don't worry about stick or servo neutrals, just the end points!Now, do a first cut adjustment of the servo neutrals. This is done initially without visualising. For each flap servo, set Limit->Offset so that it's the average of the min and max settings (e.g. if min = -80 and max = +20, set Limit->Offset to -30). This should not alter the end points set above. You now have a guaranteed linear response for each servo. The position of the flap surfaces should now match at extremes of spoiler stick travel, but unless you're very lucky (or an incredibly accurate builder!), they will not match at the stick centre. Which brings us to the next stage...Adjust the flap servo neutrals... move the throttle stick to the centre (about 16 clicks from top or bottom) and watch the flaps. Tweak the Limit->Offset values of the two servos, so that the flaps line up (they'll be at around 30 degrees of down flap, we'll correct that later). Some compromise will be necessary away from the first cut we set above, but hopefully not too much. You will then have two nicely tracking flap servos, each with reasonably linear response.Finally, adjust spoiler travel in spoiler input of the CH08 (CmRoot) mixer. Adjust Offset for down flap movement, then adjust Weight so that flaps are at neutral with spoiler off. Since you have two perfectly tracking servos, both sides should match up perfectly :-)(very finally, and optionally, tweak the flap balancer curve to obtain super accurate flap tracking - personally I have not needed to tweak this on my Sting)The aileron input should now be working over a linear portion of the flap travel, and so your flaps should have the correct diff as dialled in on your rudder trim.
why would you want the same differential on the flaps and ailerons, and not the ability to alter them independently? Yes the same differential is a good starting place but clearly on some models it benefits to change the settings a bit. Things have moved on from the p4000. On a lowly hitec radio you can adjust the aileron and flap differential for each of the 8 flight modes (and have in flight adjustments). If the setup ties the aileron differential to the flap differential, I would call that the issue, to be honest. say you had an f3j model setup for competition landings, you are quite likely to have flaps that move more down than up in response to servo movements (this is the case with my Xplorer 2).
I don't consider "snap flap expo" very important compared to tuning the CG and elevator travel... I find it rather incredulous if you are saying snap flap expo is a vital setting. I don't use it at all and my models fly pretty well.
MikeI have had another go this morning with the revised instructions and I seem to have everything working correctly...
My intention in C9X was to move the mixes from channels 1 -8 to say channels 22 and above then move them back in the order I want in channels 1-8. I seem to be able to cut and paste only one mix at a time which is a bit time consuming but no problem. I would then check the ‘higher mixes’ are pointing at the correct 'servo' channels by checking against the original. Would the above approach be ok or is there a better way?Ian H