MFD setup questions please

[BlueFlyer]

Just to add further...

If you're using the Mini Talon default model (which I know you are), then the AP is assuming that you've set your aircraft up properly, with the recommended amount of throw.

For example, the signal it sends to your servos is just enough to counter the adverse pitch... that signal would normally cause the tailerons to move (lets just pluck a figure out of the air) 5mm from neutral.

If the tailerons are mechanically set up incorrectly to give too much throw, then that exact same signal from the AP now moves the tailerons 10mm... which is far too much and results in the plane pitching up too much.

the AP senses this up pitch and applies the opposite down pitch... but the problem still exists with the throws, so the normal signal now moves the taileron too far in the opposite direction and the plane now pitches down too much....

and so on and so on... hence the bobbing effect.

I always had this problem when using APs with flying wing / elevon type aircraft because instead of mechanically shortening the throws when trimming the plane LOS in manual, I'd just use the TX to adjust endpoints and throws for dual rates. Then when I'd pop it into stability mode the AP itself is using the full range of the control signal (as it's independent of the settings in the transmitter).

Now the best way is always to trim/setup the plane mechanically before using software (either in a TX or in a AP). There are 2 ways to mechanically shorten the throws:

1. on the servo end, move the push rod to a hole closer to the servo

2. on the taileron end, move the push rod to a hole further away from the hinge

There's a possible 3rd software based option that I'm not 100% sure about, but within the MFD AP settings, I think you can actually reduce the endpoints so from one extreme to the other (on a particular output, AIL, ELE, RUD) is a smaller value.

[Coyote]

You could reduce the endpoints in the MFD AP but yes you would be  so much better off mechanically getting the control throws correct, that way not only for the AP but for the flying feel for yourself you would then have the most resolution over the stick movement and the best "feel" to the sticks.

Along with a happy AP as well :)

[SnoozeDoggyDog]

Yeh, i defo have LOADS of movement on all the surfaces. I'll reduce accordingly and turn the pitch-p setting back to default.

Cheers

[BigT]

Always a good idea to set up a plane to work comfortably in manual mode by setting linkages and trims then tweak with the computer in the radio.


Sent from my iPad using Tapatalk

[SnoozeDoggyDog]

Ive moved the links and now instead of about 25mm throw on the ail I get about 15mm. Just over 10cm on the tailerons.

I just need the weather now ....

Thanks
P