ukmark

Hi,

can anyone help?

I've always had trouble getting maximum servo travel on glider flaps (4 servo wing) when using the butterfly mixer. Setting the servo travel to 100% does not give the same travel (on channels 5,6) as that achieved when running a servo directly off the throttle stick. There is also a dead band in the lower half of the throttle stick travel (ie. stick movement with no servo movement). Changing the preset value does change the travel, but no setting gives maximum servo travel. I can get much more travel on the flap servo by using the programmable mixers, but need these for other mixing functions.

So, does anyone know how to set the butterfly mix to get the maximum possible travel from the butterfly mix?

thanks
Mark

Bax

My Feedback: (11)

You have to set up your control geometry such that you get the amount of total deflection of the control surface when the preset mixer is active. Basically set up the servo linkage so that it gives you the control surface movement you want, plus a little more. You can then regulate it down from the maximum it will move.

ukmark

Hi,

thanks for your note - I always set the link mechanics for max movement, but end up with less servo travel from neutral when using the pre-programmed butterfly mix rather than a PMIX driven directly off the airbrake (throttle stick). I finally figured out that by using the offset mix to offset the servo center I can get all the movement I need. It takes up and extra couple of mixes to do it, but gets me what I'm after.

Mark

deepblue12

Dont suppose you could elaborate further on the offset part. I'm having the same issues and dont quite see what you mean.

Thanks

gary