Справочник Пользователя для Graupner GmbH & Co. KG MC-20
117
Detail program description - Control adjust | Helicopters
not only provides a convenient means to start and
stop the motor but may also prove to be more than
an insignifi cant safety improvement! For example,
just imagine what could happen if, while carrying the
helicopter to the take-off site with the motor running,
the C1 joystick were to be inadvertently operated …
If the carburetor or speed controller is open too
far when the transmitter is switched on, an audible
warning will be sounded and the basic display will
show the message:
stop the motor but may also prove to be more than
an insignifi cant safety improvement! For example,
just imagine what could happen if, while carrying the
helicopter to the take-off site with the motor running,
the C1 joystick were to be inadvertently operated …
If the carburetor or speed controller is open too
far when the transmitter is switched on, an audible
warning will be sounded and the basic display will
show the message:
Throttle
too
high!
too
high!
Tip:
Take advantage of the »Servo display« to observe
the infl uence of the throttle limit control. The »Servo
display« screen can be reached from almost any
menu position with a simultaneous tap on the
Take advantage of the »Servo display« to observe
the infl uence of the throttle limit control. The »Servo
display« screen can be reached from almost any
menu position with a simultaneous tap on the
ef
selection keys of the left touch pad, Bear in mind that
servo output 6 controls the throttle servo on the
servo output 6 controls the throttle servo on the
mc-
20
HoTT!
Basic idle setting
Put the throttle limit into its "full throttle" position by
pushing the throttle limit regulator – by default, the
right side proportional slider SD1 – all the way to its
forward position limit. Set the throttle/pitch joystick to
the maximum pitch position and also check the sub-
menu "Channel 1 CURVE" of the menu …
Put the throttle limit into its "full throttle" position by
pushing the throttle limit regulator – by default, the
right side proportional slider SD1 – all the way to its
forward position limit. Set the throttle/pitch joystick to
the maximum pitch position and also check the sub-
menu "Channel 1 CURVE" of the menu …
»Helicopter mixer«
(page 176 … 191)
… to ensure that a standard throttle curve is active. If,
for example, the standard throttle curve has already
been changed following the initialization of a model
memory then this must be at least temporarily reset
to the values "Point L = -100 %", "Point 1 = 0 %" and
"Point H = +100 %":
for example, the standard throttle curve has already
been changed following the initialization of a model
memory then this must be at least temporarily reset
to the values "Point L = -100 %", "Point 1 = 0 %" and
"Point H = +100 %":
"Tl16"
The proportional slider SD1, mounted on the right
side of the transmitter, is assigned by default to input
"Tl16".
side of the transmitter, is assigned by default to input
"Tl16".
0%
I13
+100%
I14
I15
Tl16
TYP
+100%
– travel +
–time+
0%
+100%
+100%
0.0 0.0
0%
+100%
+100%
0.0 0.0
0%
+100%
+100%
0.0 0.0
GL
GL
GL
fr
fr
Lv1
---
---
---
Offset
GL
Nor mal
0.0 0.0
fr
---
SET
This pre-assignment makes it unnecessary to
program the two fl ight phases as may be familiar from
use of other remote control systems – one "with idle-
up" and one "without idle-up" – because the
program the two fl ight phases as may be familiar from
use of other remote control systems – one "with idle-
up" and one "without idle-up" – because the
mc-20
HoTT program offers a much more fl exible approach
to fi ne-tuning and optimizing increases to system
rotational speed below the hover point than the so-
called "idle-up". If it is nevertheless preferable for
the helicopter to be programmed "with idle-up", then
deactivate the "throttle limit" function described below
by setting input "Tl16" to "fr".
to fi ne-tuning and optimizing increases to system
rotational speed below the hover point than the so-
called "idle-up". If it is nevertheless preferable for
the helicopter to be programmed "with idle-up", then
deactivate the "throttle limit" function described below
by setting input "Tl16" to "fr".
Meaning and application of "throttle limit"
As already mentioned under "Throttle", and in
contrast to fi xed-wing models, the power output of
a helicopter's drive system is not controlled directly
with the C1 joystick, but only indirectly via the throttle
curve settings in the »Helicopter mixer« menu
or – if the model features a speed controller – via that
mechanism.
contrast to fi xed-wing models, the power output of
a helicopter's drive system is not controlled directly
with the C1 joystick, but only indirectly via the throttle
curve settings in the »Helicopter mixer« menu
or – if the model features a speed controller – via that
mechanism.
Note:
Of course for different fl ight phases, fl ight phase
programming can be used to set individual throttle
curves.
Of course for different fl ight phases, fl ight phase
programming can be used to set individual throttle
curves.
Nevertheless, both methods of output control de facto
result in the helicopter carburetor never approaching
result in the helicopter carburetor never approaching
Throttle limit function
anything near its idle speed under "normal" fl ight
conditions, and that the motor can therefore neither
be started or stopped cleanly without some other
means of intervention.
The "throttle limit" feature resolves this problem
elegantly by using a separate transmitter control – by
default the SD1 proportional slider mounted on the
right side of the transmitter – to limit the throttle servo
or the output level of a speed controller. In this way,
it is possible to "throttle back" with the throttle limit
control, even as far as the idle setting, at which point
the trim control for the throttle/pitch joystick takes
over or directly shuts off an electric drive. Conversely,
the throttle servo or speed controller can only open
up to its full-throttle position if the throttle limit control
has also released the full servo travel path.
The value set on the (right-hand) plus side of the
"travel" column must therefore always be set high
enough to ensure that the maximum setting of the
throttle limit control never restricts the full-throttle
position achievable with throttle curve settings – which
typically means setting a value in the range +100 % to
125 %.
conditions, and that the motor can therefore neither
be started or stopped cleanly without some other
means of intervention.
The "throttle limit" feature resolves this problem
elegantly by using a separate transmitter control – by
default the SD1 proportional slider mounted on the
right side of the transmitter – to limit the throttle servo
or the output level of a speed controller. In this way,
it is possible to "throttle back" with the throttle limit
control, even as far as the idle setting, at which point
the trim control for the throttle/pitch joystick takes
over or directly shuts off an electric drive. Conversely,
the throttle servo or speed controller can only open
up to its full-throttle position if the throttle limit control
has also released the full servo travel path.
The value set on the (right-hand) plus side of the
"travel" column must therefore always be set high
enough to ensure that the maximum setting of the
throttle limit control never restricts the full-throttle
position achievable with throttle curve settings – which
typically means setting a value in the range +100 % to
125 %.
0%
I13
+100%
I14
I15
Tl16
TYP
+100%
– travel +
–time+
0%
+100%
+100%
0.0 0.0
0%
+100%
+100%
0.0 0.0
0%
+125%
+100%
0.0 0.0
GL
GL
GL
fr
fr
Lv1
---
---
---
Offset
GL
Nor mal
0.0 0.0
fr
---
SET
The value on the (left-hand) minus side of the
"travel" column should be set so that the throttle limit
control can safely cut off an electric drive or close a
carburetor suffi ciently to cut off a combustion motor
in conjunction with – digital – C1 trim. Because of this,
leave this value (initially) at +100 %.
Furthermore, this variable "limitation" of throttle travel
"travel" column should be set so that the throttle limit
control can safely cut off an electric drive or close a
carburetor suffi ciently to cut off a combustion motor
in conjunction with – digital – C1 trim. Because of this,
leave this value (initially) at +100 %.
Furthermore, this variable "limitation" of throttle travel