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189
Detail program description - Helicopter mixer
Therefore, after the motor is started, system rotational
speed should be increased s l o w l y by way of the
throttle limiter. If a switch has been assigned to the
throttle limiter, always ensure the »Control adjust«"
menu (page 112) is used to program a time constant
of about 5 seconds to run up system rotational
speed (opening the throttle limiter). Do not, however,
program a delay for closing the throttle limiter. Leave
the default value of "GL" in the "Type" column alone,
however, to confi gure this setting globally for all fl ight
phases.
speed should be increased s l o w l y by way of the
throttle limiter. If a switch has been assigned to the
throttle limiter, always ensure the »Control adjust«"
menu (page 112) is used to program a time constant
of about 5 seconds to run up system rotational
speed (opening the throttle limiter). Do not, however,
program a delay for closing the throttle limiter. Leave
the default value of "GL" in the "Type" column alone,
however, to confi gure this setting globally for all fl ight
phases.
be a visual and an acoustic warning if the carburetor
is open too wide when the transmitter is switched
on. Otherwise, if the carburetor or speed controller is
open too far when the motor starts, there is a danger
that the motor will run up to speed immediately
after starting, and the centrifugal clutch will engage
immediately.
Accordingly,
is open too wide when the transmitter is switched
on. Otherwise, if the carburetor or speed controller is
open too far when the motor starts, there is a danger
that the motor will run up to speed immediately
after starting, and the centrifugal clutch will engage
immediately.
Accordingly,
always hold the rotor head
fi rmly when starting.
Nevertheless, if the motor is accidentally started with
the carburetor too wide open, the golden rule is this:
the carburetor too wide open, the golden rule is this:
Don't panic!
Hold the rotor head securely!
Don't let go!
Instead, close the throttle limiter immediately, even
if this risks damaging the drive system (in the worst
case scenario).
if this risks damaging the drive system (in the worst
case scenario).
YOU must ensure
the helicopter never moves
in an uncontrolled manner.
The costs of repairing a clutch, a gearbox or even the
motor itself are negligible in comparison to the injuries
and damage that an uncontrolled model helicopter
can cause if it is allowed to thrash about with spinning
rotor blades.
motor itself are negligible in comparison to the injuries
and damage that an uncontrolled model helicopter
can cause if it is allowed to thrash about with spinning
rotor blades.
Always make sure no other person
is present in the
helicopter's hazard area.
The switchover from idle to a fl ight setting with
increased system rotational speed must not take
place abruptly. This will cause the rotor to accelerate
very quickly, resulting in premature wear to the clutch
and gear train. Since the main rotor blades are
generally mounted on a freewheeling unit, they will
be unable to keep pace with such rapid acceleration;
they will respond by swinging far out of their normal
position and may even cause a boom strike.
increased system rotational speed must not take
place abruptly. This will cause the rotor to accelerate
very quickly, resulting in premature wear to the clutch
and gear train. Since the main rotor blades are
generally mounted on a freewheeling unit, they will
be unable to keep pace with such rapid acceleration;
they will respond by swinging far out of their normal
position and may even cause a boom strike.
This diagram shows only the
change to the hover point, i. e.
collective pitch minimum and
maximum are both left at -100 %
or +100 %.
change to the hover point, i. e.
collective pitch minimum and
maximum are both left at -100 %
or +100 %.
+100%
-100%
OUTPUT
2
3
4
5
1
Control travel
Modify these settings until they really result in a
constant rotational speed over the full control range
between hovering and climbing fl ight.
constant rotational speed over the full control range
between hovering and climbing fl ight.
Descent setting
The descent setting should now be confi gured by
placing the model in a steady descent from forward
fl ight at a considerable altitude by fully reducing
collective pitch; adjust the collective pitch minimum
value (point "L") so that the model descends at an angle
of 60° … 70 °. Therefore, on the "Pitch" graph page, put
the vertical line on Point "L" by moving the pitch joystick
then change this point's value appropriately with the
selection keys of the right touch pad.
placing the model in a steady descent from forward
fl ight at a considerable altitude by fully reducing
collective pitch; adjust the collective pitch minimum
value (point "L") so that the model descends at an angle
of 60° … 70 °. Therefore, on the "Pitch" graph page, put
the vertical line on Point "L" by moving the pitch joystick
then change this point's value appropriately with the
selection keys of the right touch pad.
This diagram shows only the
changes when setting the minimum
collective pitch value.
changes when setting the minimum
collective pitch value.
+100%
-100%
OUTPUT
2
3
4
5
1
Control travel
Hover
point
Once the model can fl y this maneuver properly, set
the value for "Throttle min" – the value for point "L"
on the graph page for "C1
the value for "Throttle min" – the value for point "L"
on the graph page for "C1
¼ throttle" – so that the
rotational speed neither increases nor decreases.
This completes the set-up procedure for throttle and
collective pitch.
This completes the set-up procedure for throttle and
collective pitch.
Some important closing remarks
Before starting the motor, ensure that the throttle
limiter is fully closed: this ensures that the carburetor
now responds only to the C1 trim wheel. There will
limiter is fully closed: this ensures that the carburetor
now responds only to the C1 trim wheel. There will