JR 10X HELICOPTER VERSION User Manual page 38

It's important that a 0 degree pitch point be established for each
flight mode so that this point can remain at a value of 0 on the
tail curve screen.
This method of set up is necessary so that any minor changes to
the main blade pitch curve can be compensated for through the
use of the rudder sub-trim or a mechanical linkage adjustment.
Tail Rotor Curve Point Selection
Although you new PCM10X allows you to select up to 8 points
for each tail curve, it is generally much easier to start with the
minimum number of points required (3) and increase the number
of points as needed until the correct tail curve is established.
It is recommended that these 3 points be established at the low,
0 degree, and high pitch positions. Once the tail curve has been
tested and adjusted using only the three points, additional points
can be added at the 1/4 and 3/4 stick positions, or matched to
your pitch curve point locations for a more precise match to your
pitch curve.
This method has been found to be the easiest and quickest way to
establish a proper tail pitch curve.
Set Up Tip
When selecting your tail rotor curve points, it's desirable for
these points to be at the same input location as your pitch
and throttle curve point. Please refer to "Charts A" at right.
Tail Rotor Curve Compensation Direction
In most cases, a helicopter with a clockwise main rotor rotation
will require the tail rotor curve to be set-up as an "inverted" V.
Conversely, a counterclockwise main rotor rotation will require
the tail rotor curve to be set-up as an "upright" V. Please refer to
the diagrams below for an example of a standard "inverted" V
curve for clockwise rotation models.
Flight mode for which the
tail curve is being adjusted
Indicates program
being accessed
Touch either the
Touch to
to increase/decrease
activate EXP
the output value of the
(exponential)
selected mix point
function
Touch to select either
normal or origin mix. Refer
to these sections for more
information
38
Indicates current point
Indicates current (stick position) to be
adjusted
mix type
Indicates stunt Touch
mix rate value to memorize data
selected and exit program
Basic tail curve mixing
or
values with a 1/1 mix rate
values:
Low -15
1 -7
2 0
Touch 0 (zero) to
3 -7
reset the selected
High -15
point to zero
Normal Mode Tail Curve Example
The tail curve screen shown below is a good example of a stan-
dard normal mode tail curve to match a pitch curve set up of
approx -5 degrees (low), +5 degrees (half) and +10 degrees
(high) pitch setup. These values are for a clockwise rotation
(right direction) model. The values listed are a good starting
point from which to establish your final tail pitch curve.
Note: All values shown are "input" stick values.
As you will see, the tail pitch curve is set up using only 3 points
(low, half, and high). Once these points are established through
flight testing, then two additional points at 25 (1/4) and 75 (3/4)
percent stick output may be added and fine tuned to match the
points on the pitch and throttle curves shown.
Indicates program
being accessed
Flight mode for which tail
curve is being adjusted.
Use flight mode switch to
Indicates stunt mix
select desired tail curve
value selected
Touch to Touch
select either activate the EXP
normal or origin
(exponential)
mix. Refer to these
function
sections for more
information
Pitch Curve Throttle Curve
0° pitch at 1/4 stick 0° pitch at 1/4 stick
setup (normal mode) setup (normal mode)
25 50 75 100 25
0 0
Input stick value Input stick value
As noted, all input stick values are set to the same position for each of the three curves (0, 25, 50, 75, 100).
Stunt Mode Tail Curve Examples
To access the stunt mode tail curves from the Normal mode tail curve
screen, simply move the flight mode switch to the desired flight
mode position to be adjusted. The screen will appear as shwon on the
following page.
Touch
memorize data and
exit program
Cursor indicates
current point (stick
position) to be adjusted
Touch or to
to Touch
increase/decrease the
(zero) to reset
output value of the the selected
selected mix point
point value to 0
Charts A
Tail Rotor Curve
Mix 0° pitch at 1/4 stick
Value setup (normal mode)
+100
+50
0
0
-10
-50
-50
50 75 100 25 50
0
Input stick value
10X MANUAL Heli
to
-20
75 100