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X20/X20S and Ethos v1.2.10 User Manual
Aileron to Rudder
One of the most commonly used mixes for sailplanes, to help the model have more
coordinated turns.
Airbrakes
The Airbrakes mix is similar to the Butterfly mix below, except that it is controlled by
an on-off active condition.
Butterfly
Butterfly or crow braking is used to control the rate of descent of an aircraft. The
ailerons are set to go up a modest amount, while the flaps go down a large amount.
This combination creates a lot of drag, and is very effective for braking and therefore
ideal for controlling the landing approach. The input is normally set to a slider (or the
throttle stick on a glider).
Compensation is also needed on the elevator to avoid the glider ballooning up when
crow is applied.
Camber
The Camber mix is functionally the same as the Butterfly mix, but is usually used to
apply some camber to the wing surfaces to increase lift.
Flap to Elevator
The Flap to Elevator mix is useful for flap/camber/crow compensation, where a custom
compensation curve is required.
Elevator to Camber
Also known as Snap Flap, this mix adds camber to the wing as elevator is applied. This
allows the wing to generate lift more efficiently when the plane is given pitch
commands.
Rudder to Aileron
This mix is used to counter rudder-induced yaw in knife-edge flight.
Rudder to Elevator
This mix can help to improve knife-edge flight when there are coupling issues.
Snap Roll
The snap roll is an auto-rotation maneuver in a stalled condition. During a snap, one
wing is stalled while the other is accelerated about the roll axis. This creates a sudden
roll-rate acceleration that you cannot obtain by simply inputting aileron. To achieve
this condition in a model, several inputs must be given, including elevator, rudder and
aileron. For example, you can perform an inside left snap by programming the mix to
simultaneously apply up-elevator, left rudder and left aileron for 1 to 2 seconds.
Recover from the maneuver by neutralizing the sticks and immediately adding right
rudder to correct your loss of heading.
Throttle to Elevator
This mix allows elevator compensation for planes that change pitch on changing
throttle.
Throttle to Rudder
This mix will help the plane fly straight when at full throttle; it’s generally needed
when flying a vertical up-line.
65
rev 3
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