Hello!

I'm building a CAmodel Extra 300L 31% 2360mm, that I'll maiden in a few days. For what I have heard about the Extras, they need a mix of rudder (as master) with elevator, for the knife edges, so I think I'll need it too.
When you use mix, you put the mix in a button and you turn the mix on or off, when you are going a maneuver, or you have it always on, without any button?
I know that you need this mix in many many maneuvers, like rolling circles, rolls... not only in knife edge. But, how about torqueroll? Do you have the mix on for the torqueroll or hovers too?

By the Way, do you use any other mix in these planes?


Thank you very much

Juan Sánchez - www.acro3d.com

Of course all Exrtra models are not equal. I have not flown the CA model so I cant comment on the typical mixes. Also, pitch couple with rudder is a function of many things, one big one being CG, and many things need to be considered when properly trimming out an airplane.
Thats being said, lets assume you need mix and I'll answer your question.

Personaly, I set mixes like this so they are always on. If the model needs a lot of mix, I suppose it could act adversly in T rolls, hammers etc, but a good model wont need a lot of mix, unless you are running a very aft or forward CG.

Other mixes you could need are rudder (master) to aileron to mix out roll couple. The model could roll either way, proversly (with rudder) or adversly (away from rudder). That is primnarily a function of the amount of dihedral in the model. Like mix for pitch, I leave that on all of the time as well.

Other mix you could need is down elevaotr to throttle. This is done to correct for a model that does not track perfectly straight down. A lot of scale aerobatic designs tend to hint toward their top side (pull out) on a downline. To fix this you can mix in a small amount of down elevator that comes in with the last 2 clicks of low throttle. Start with about 1% mix. I just leave tha one on all the time as well.

With all mixes, first fly your model unmixed, and then add mix as needed. The mix values will probaby be unique for each model.

Thank you very much. Only one question: abot the mix down elevator to throttle, which one is the master and which one the slave?


Thank you very much

Mike, about downline mixes. Do you stay above the last 2 clicks in 45's to stay out of the mix or do you go to idle. For instance, on the 3of2 on the laydown humpty in this year Unlimited sequence, it could get quite rushed if you had some power in on that one. Also, do you have on landing as well or on a switch to disable it? Thanks ahead of time.

-Kelly Gerber

On the down elevator mix, the throttle is the Master.
Kelly, that is a good question. I throtle all the way back and justy fly through it. The mox on mist models is very flight and doesnt canse a real noticable pitch change, its is more of a fade.
One technique I do use is to always transition the throttle through the kick point as I pull or puch to level flight, so there isnt any bump noticed ona line.

For landing, I just leave it on.

I heard Mike mention the throttle -> elevator mix before. I tired it and found that during landings, it is not noticable.
It also greatly improves my down lines which always looked crooked before I added the mix.

Throttle to rudder mix or throttle to elevator?

One thing I have done to eliminate the mix during landings is the assign the throttle to elevator mix to the same switch that activates the idle up. When the idle up mix is activated to ensure the motor does not die in flight, the throttle to elevator mix is activated. When I go to land, I turn off the idle up which also disables the throttle to elevator mix.

You are right, I fixed it, thanks.