Step #25 Elevator-to-Flap Mix
S-57
In Function Mode list, rotate the Selector until
ELEFLP M is highlighted. Press the Selector
to access the Elevator-to-Flap mix menu. Note that two
elevator-to-flap mix values are available, Pos0 and
Pos1, and that the elevator-to-flap values can be
independently adjusted up and down. Also the offset
(the stick position where the mixing changes from
up to down) can be adjusted. This offset allows the
programming of snap-flaps, a common sailplane
function that gives greater full up elevator pitch authority
for tighter turns. With snap-flaps, no flap mixing
occurs during small to medium up elevator inputs,
but at about 80% up elevator, the flaps are mixed to
give down flaps, causing greater up pitch authority.
Rotate the Selector to highlight
CRU (cruise mode) at
the bottom of the screen and depress the Selector to
select Pos1. If you choose to program snap-flaps, rotate
the Selector until the Offset Pos1 is highlighted and
depress the Selector to access this value. A 0 value
locates the offset position when the elevator is centered.
The adjustment range is -200 to +200. Negative values
move the offset in the up elevator direction. Set a value
of –100 to start, as this will locate the offset at 80% up
elevator. Press the Selector to store this offset value.
Rotate the Selector to highlight Pos1 UP and depress
the Selector to access the position 1 up elevator mixing.
With the 3-position switch in the middle (cruise) position,
give a full up elevator command and hold while adjusting
the Pos1 up value until the desired down flap position is
achieved. Press the LIST button to return to the Function
Mode screen.
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