188 Detail program description - Helicopter mixer
the collective pitch stick to its end-point. Compared to
the hover confi guration, motor speed should remain
unchanged.
If motor speed falls off in the climb, even with the
drive system working at full power and therefore
no further power increase is possible, then reduce
maximum blade pitch angle at full defl ection of the
collective pitch stick, i.e. the value of point "H".
Conversely, the attack angle should be increased if
motor speed is to increase while climbing. Therefore,
on the "Pitch" graph page, put the vertical line on
Point "H" by moving the pitch joystick then change
this point's value appropriately with the cd selection
keys of the right touch pad.
This diagram shows only the
changes when setting the maximum
collective pitch value.
+100%
-100%
OUTPUT
234 51
Control travel
Hover
point
Then bring the model back to hover, which should,
in turn, be achieved with the C1 stick at its center
point. If the hover fl ight point is now achieved only by
moving the pitch joystick away from its center point
toward "higher" values then this deviation should
be compensated by increasing the hover-fl ight pitch
value – i.e. for point "1" – a little until the model once
again hovers with the joystick at its center point.
Conversely, if the model hovers below the mid-
point, correct this by reducing the angle of attack
appropriately.
It may also be necessary to correct the carburetor
opening for the hover point (point "1") with "C1 ¼
throttle".
The model should lift off the ground with the collective
pitch stick roughly at its center point and hover
roughly at the expected rotational speed. If this is not
the case, proceed as follows:
1. The model does not lift off until the collective
pitch stick is above the center point.
a) Rotational speed is too low
Remedy: On the graph page
for "Channel 1 ¼ Throttle"
increase the value for
point "1".
+100%
-100%
OUTPUT
234 51
Control travel
Hover
point
b) Rotational speed is too high
Remedy: Increase the blade
angle of attack pitch by
increasing the value of point
"1" on the "Pitch" graph page.
+100%
-100%
OUTPUT
234 51
Control travel
Hover
point
2. The model lifts off before the center point is
reached.
a) Rotational speed is too high
Remedy: Decrease the
carburetor opening by
reducing the value of point
"1" on the graph page for
"Channel 1 ¼ Throttle".
+100%
-100%
OUTPUT
234 51
Control travel
Hover
point
b) Rotational speed is too low
Remedy: Decrease the blade
angle of attack pitch by
reducing the value of point "1"
on the graph page for "Pitch".
+100%
-100%
OUTPUT
234 51
Control travel
Hover
point
Important:
These settings must be reconfi gured until the model
hovers at the correct rotational speed with the
throttle/collective pitch stick at its center point. The
confi guration of all other model parameters depends
on these settings being made correctly!
Standard set-up
Standard set-up is completed on the basis of the
basic set-up described above, whereby the model
hovers in normal fl ight at the correct rotational speed
with the throttle/collective pitch stick set to its center
point: This means a set-up with which the model
is capable of both hovering and fl ying circuits in all
phases while maintaining a constant rotational speed.
Climb settings
The combination of throttle hover setting, collective
pitch setting for the hover and the maximum collective
pitch setting (point "H") now permits, in a simple
manner, a means of attaining a constant rotational
speed from hovering right through to maximum climb.
First, perform a prolonged, vertical climb by moving
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