Example of a Mix
An electric powered glider usually flies a lot faster when climbing than when gliding. The extra speed
generates more lift from the wings, so the model wants to do a large loop. A little down elevator is
required to keep the nose from lifting. We need a mix to do this automatically.
Assume the throttle is operated by a switch and therefore full power is applied instantly. The Gear
switch (GEA) is being used to control the motor and is on CH5, as shown below:
When the GEA switch is flipped to ON, the signal to the ESC via CH 5 goes from -100% to +100%
because that’s how the FULL input works: the value is either –weight or +weight.
In order to have this power-up command affect not only the motor via the ESC but also the elevator
servo, we need the GEA switch to control a mix in the Elevator servo channel (CH3). But we only
want a small effect, say 5% weight.
To create this mix navigate down the MIXER page to highlight the Elevator channel and press
MENU.
In the resulting pop-up menu select INSERT. This creates a new mix line.
Press MENU. This takes you into the edit menu for the new line.
In this menu, the first field asks for the source of the mix. Because we are using a switch and not a
stick we want the source to be FULL or HALF. A switch has no intrinsic value unless a source is
assigned to it. Two possibilities are available for our purpose:
FULL operates from --100 to + 100.
HALF operates from 0 to +100.
For the elevator we choose HALF because we only want zero or negative movement (down).
The next field is the weight. If we entered 100 the elevator output would move from 0 with the switch
OFF to + 100 with it ON. This is clearly too much movement. As we need only a fine adjustment let's
try a weight of 5%. After the test flight this can be increased or decreased.
Ersky9x Explained – version 1
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