VTAL — V-Tail Mixing
V-tail mixing is used with V-tail aircraft so that
both elevator and rudder functions are combined for the
two tail surfaces. Both elevator and rudder travel can be
adjusted independently. However, if you program in too much elevator or rudder travel, when
both rudder and elevator are commanded the servos may reach their travel limits before full stick
motion has occurred. Therefore, you should keep the travel settings at 50% or below and adjust
the control linkages to get the travel you desire.
Ch 2
Up Elevator
Left Rudder (view from rear)
Ch 4
Ch 2
Ch 4
Please note that you may only use one function from flaperon, elevon, or V-tail at a time.
The last one activated has priority. If you need V-tail with a flaperon model, use the
programmable mixers (
PMXI
&
PMX2
) to program in the V-tail function.
Setting up V-Tail mixing
1. Use the up or down arrow keys to select the
VTAL
window.
2. Press the
CURSOR
key three times to get to the activation setting. The
INH
indicator will flash on and off.
3. Press the (+) key to enable the V-tail function. The display will show a flashing ON.
4. Press the
CURSOR
key once, to get to the elevator setting menu. A small
arrow is displayed over the numeral 2 (representing elevator), and the plus
or minus sign above the large setting number will blink on and off.
Pull back on the elevator stick: both sides of the V-tail should move upwards. If they don’t,
you may change the elevator travel direction with the (+) and (–) keys. Note that this
reverses the response at both V-tail servos (not just one as in the REV menu). If only one
servo moves up, reverse the other one in the REV menu.
5. Now you’ll input the amount of elevator travel by pressing the
CURSOR
key once. Now the
percent sign will blink on and off, and you may adjust the amount of elevator travel with the
(+) and (–) keys. You may change the initial 50% setting to be anywhere between 0% and
100% (press the plus and minus keys together if you wish to reset to 50%).
6. Next: the rudder inputs. Press the
CURSOR
key once. A small arrow
should appear over the numeral 4 in the screen, and the sign in front of the
large setting number will flash on and off. Holding left rudder stick, verify
that the servos move the correct direction (see figure). If they move incorrectly, change the
direction by pressing the (+) or (–) key which changes the flashing sign displayed.
7. Now input the amount of rudder travel. Press the
CURSOR
key once; the percent sign will
blink on and off. You may adjust the amount of rudder with the (+) and (–) keys, changing
the initial 50% setting to be between 0% and 100% (press the (+) and (–) keys together if you
wish to reset to 50%). Remember to be sure not to have so much travel as to cause binding
when both elevator and rudder are commanded simultaneously.
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