Futaba 9VAP - Manual (Page 23)

TYPE 1 Positive TYPE 2 Positive
With this type of curve, control response will be made
more sensitive near neutral and less sensitive as the stick
is deflected farther towards its extreme limits.
With this type of curve, response will be most sensitive
at the LOW end of control stick travel, and decrease as
the stick is moved toward HIGH.
TYPE 1 Negative TYPE 2 Negative
With this type of curve, control response wilt be
"softer" around neutral and increase as the stick is
deflected farther.
With this curve, the response is less at the LOW end and
steadily increases as the stick is moved toward HIGH.
• When VTR is used, servo response remains linear, but the response is automatically switched to a higher
rate at a certain (adjustable) point in the control stick deflection.
• The initial response rate is the same as the Dual Rate ON rate (See page 18).
• Maximum servo travel limit is still controlled by ATV and/or AFR.
Setting Methods
Exponential
1) Select the EDIT screen and move the cursor
to Line 2 with the cursor key. or
the "rate" position and pressing the or
program key. When the program
cursor key, then select the operation
Select the EXPONENTIAL/VTR program
screen by pressing the program key.
2) Select the channel to be set with the or
mode with the program , or
key. VTR is available only on CH1, CH2, and
CH4.
3) When the EXP mode is selected, the type of
curve can be selected by moving the cursor
to the "typ" position with the
or
cursor key and pressing the or pro-
gram key. (The type of curve is not selected
in the VTR mode.)
4) When the EXP or VTR mode is selected, the
servo response curve is displayed on a graph
at the right side of the screen. The amount of
Expo can be changed by moving the cursor to
key is pressed, the rate is preset to 0% (0% =
normal or linear).
5) In the VTR mode, the "rate" adjustment is
used to adjust the stick position at which the
servo response changes from Low to High.
The initial (Low) rate is adjusted by the D/R
adjustment program (See page 18).
6) Channels 5 through 8 can be displayed and set
by pressing the program key.
In the above example, a TYPE 2 Negative Ex-
ponential Curve is shown. This type is often
helpful on the Throttle channel. Depending on
the carburetor design and linkage, actual power
transition can be made more linear in relation to
stick movement. (About -20% is a good initial
setting for fixed-wing aircraft).