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Rudder Mixes
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There are two mixes that are related to rudder. Those are rudder to aileron, and rudder to elevator. In both cases the rudder will be set as the master. The aileron and elevator will be the slaves. Both will also be checked by flying knife-edge flight.

Start by making sure your plane is trimmed for level flight at throttle. Then fly some knife edge passes. Roll to the right, and use left rudder. Note what the plane does as you add the rudder. Almost all planes will roll back to the left (back to upright flight), and almost all will have a tendency to pitch up or down (canopy or gear direction). Note the directions of roll and pitch with left knife edge, and then fly some passes where you roll left and add right rudder for knife edge. Note what happens in that direction also. It is often helpful to have somebody stand by you to take notes, as it is easy to forget by the time you land. Now land and set you mixes.

Aileron

For the aileron mix, choose between a program mix or the “canned” mix already in the radio. Use the program mix unless you are certain you will never fly 3D with your plane. You will have to select the rudder as master and aileron as slave. Be sure to activate it so it is always on - no switch to turn it off. If you are running two aileron channels, select the “link” function, if it is available, so it will mix to both aileron channels. Finally, choose a multi-point, or curve, mix option, so you can set several points.

1) For pattern, you will only be using the two mix points closest to center. Set the outer points to match the inner points for now. We will adjust them in the 3D section later.

2) Start with a 50% mix rate to ensure you get the correct direction for your mix. Most planes need aileron opposite the direction of the rudder. So, when you use right rudder, the ailerons will deflect left with the mix - and vise versa. Once you get the directions correct, reduce the mix down to about 5% to start with.

3) Set your elevator mix as described below if necessary, and then run the test again. Readjust a percent or two at a time, until the plane flies level knife-edge with NO tendency to roll.

Elevator

For the elevator you will have to use a program mix. Select the rudder as master and the elevator as slave. Activate it, so it is always on. Once again, select the “link” function if you are running two channels for your elevators. Pick a linear style mix (only two points) if you are only flying pattern, or a multi-point mix if you plan on flying any 3D.

1) For pattern, you will only be using the two mix points closest to center. Set the outer points to match the inner points for now. We will adjust them in the 3D section later.

2) Start with a 50% mix rate so you can be sure you are setting the correct direction. You want the elevator to move opposite the way the plane pitched in your tests. Once your get both directions correct, reduce the mix down to about 2% for starters.

3) Run the test again, and adjust a percent at a time until the plane flies straight in knife-edge.

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