Model menu
Collective pitch / throttle
curve
F X - 4 0
Separate:
= Collective pitch curve for the current flight
mode
Fine:
= Collective pitch curve for fine-tuning
All modes:
= Collective pitch curves for all flight modes
Pitch & Throttle: = Collective pitch and throttle curves
The screen shots below show typical graphic displays of these
options.
Collective pitch
curve for fine-
tuning
Collective pitch
curves for all
flight modes
Superimposed
display of col-
lective pitch
and throttle cur-
ves
19.2 THROTTLE CURVE SETTINGS
Operating the throttle stick moves the throttle servo, but also
automatically operates the collective pitch servos. The match
between collective pitch and throttle is very important, and for
this purpose the throttle function can be assigned one of six
possible curve types, each of which can be allocated a maxi-
mum of seventeen variable points. The FX-40 also offers swit-
chable flight modes which enable the pilot to set up the opti-
mum throttle curve for each individual flight mode.
To move to the throttle curve set-up screen, mark this option in
the Model menu (‘Helicopter’ type already selected). The
screen now looks like this:
For the model helicopter application, the throttle and collective
pitch functions are always intimately connected. It therefore
makes obvious sense to have direct access to the collective
pitch function from the throttle curve set-up screen. You can
switch to AFR programming for the collective pitch function by
marking the appropriate field in the first line. The active display
always has a red background. It is possible to determine whet-
her the settings are to apply to all flight modes (Glob) or only to
the currently activated flight mode (Sepa) using the ‘Glob’ or
‘Sepa’ button field. The change takes place when you confirm
the security query.
• Programming throttle curves
In this menu for the following flight modes throttle curves
can be set up:
Normal:
for starting and stopping the motor
Idle-up 1:
for hovering
Idle-up 2:
for circuits
Idle-up 3:
for aerobatics
Auto-rotation:
for auto-rotation landings
Flight modes 6 - 8:
for any other purpose
If you wish to set up different throttle curves, you must first
switch from group mode (Glob) to individual flight mode
(Sepa). You can switch between these two curves (flight
modes) by operating the switch (flight mode switch) assigned
to that mode (see Section 17.1, page 55). When you switch the
transmitter on, the Normal flight mode must be selected; if not,
the mixer alarm sounds. The RF section can only be switched
on in ‘Normal’ mode.
Throttle curves are programmed using the familiar procedure.
First you have to define the curve type: five curve types are
available via the corresponding fields, in addition to the stan-
dard linear curve. The values are adjusted exactly as descri-
bed for programming the Dual Rate curves. Please refer to
Section 17.2 on page 57.
This shows a typical throttle curve for the ‘NORMAL’ flight
mode. The curve should be programmed in such a way that
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