User Manual

DOWN ELEVATOR AT IDLE TO ELIMINATE PITCHING TO CANOPY ON DOWN LINES
This mixer is intended for aircraft that pull-out or pitch towards the canopy when flying a vertical down
line at idle. If a mix is set up to provide a couple of degrees of down elevator when at idle, the aircraft
will track straight down without input from the pilot. Once the throttle is advanced above idle, the
mixer is turned off and the down elevator is removed. The mixer can also be turned off so the down
elevator input does not occur during landing.
This mixer uses the Throttle as the Master and the Elevator as the Slave. The mix is turned on and off
with the GEAR switch in combination with the position of the throttle stick – ON at idle and OFF
above idle with the GEAR switch ON. When the GEAR switch is OFF, the mixer is turned off
regardless of throttle setting.
1. Select an unused Program Mixer (PROG MIX3, 4, 5, or 6)
2. Select #THR as the Master and Select ELEV as the Slave.
3. Scroll down, highlight, and select GER as the switch to be used to turn the mixer on and off.
4. Move the Gear switch back and forth while observing the number directly to the right of the
program mix name in the upper left portion of the display. The number will change between 0
and 1 as the switch is moved back and forth. When the number is 0, the mixer is looking at the
Pos0 values (not programmed yet) and when it is 1, the mixer is looking at the Pos1 values (also
not programmed). Put the switch in the position where you want the mixer to turn ON. Look at
the number directly to the right of the Program Mix name. If it is 0, highlight and select Pos0
on the display. If it is 1, highlight and select Pos1 on the display.
5. With the switch still in the ON position, move the throttle stick to the full low position and the
lower parameter next to the selected position should be highlighted. Set the lower parameter to
a small negative value like -3%. This is the amount of deflection of the elevator that is to occur
when the mixer is turned on and the throttle is reduced to idle.
6. The elevator should barely move downward when the throttle is set to idle. If the elevator
moves upward, change the –3% to a +3% to reverse the direction that the elevator travels. The
elevator can be made to move more by increasing the percentage (more negative or more
positive) and move less by decreasing the percentage. After test flying the aircraft adjust the
percentage as may be necessary. Leave the upper parameter of the selected position at 0%
because there is to be no elevator input above idle.
7. Offset. Highlight and select OFFSET and set the value to –140 to -160. This represents a
throttle stick position that is about 2-3 clicks up from full low stick. This is also the point where
the mixer causes the elevator to deflect the –3%. Above this position there is no elevator
deflection and the elevator returns to normal.
8. Verify Operation. Highlight and select the position with the –3% value. Move the Gear switch
to the ON position and move the throttle stick from full throttle to idle while observing the
values. When the stick is brought down to idle, the lower position value is highlighted
indicating the down elevator deflection (-3%). Verify that the elevator is deflecting downward
just a bit. When the stick is advanced above idle, the upper position value is highlighted (0%)
and the elevator returns to normal (no mixing).
9303 Program Mix Examples 6