Bedienungsanleitung Graupner MX-16 HoTT (Seite 121 von 200) (Englisch)

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Program description: helicopter mixers – model helicopter

already fully open and no further power increase is pos-

sible (this assumes that the motor is correctly adjusted),

then you should reduce the maximum blade pitch angle

at full deﬂection of the collective pitch stick, i. e. the value

at Point 5. Conversely, if motor speed rises during the

vertical climb, you should increase the pitch angle. This

is done on the “Collective pitch” graphic page by moving

the vertical line to Point 5 using the collective pitch stick,

and changing its value accordingly using the arrow but-

tons  of the right-hand touch-button.

This diagram shows the changes

to the collective pitch maximum

value only.

+100%

100%

OUTPUT

2 3 4 51

Control travel

Hover

point

Now bring the model back to the hover, which again

should coincide with the mid-point of the Ch 1 stick.

If you ﬁnd that the collective pitch stick now has to be

moved from the mid-point in the direction of “higher”,

then you should correct this deviation by slightly increas-

ing the collective pitch angle at the hover - i. e. Point

3 - until the model again hovers at the stick centre point.

Conversely, if the model hovers below the mid-point, cor-

rect this by reducing the pitch angle once more.

You may ﬁnd that it is also necessary to correct the

throttle opening at the hover point (Point 3) in the “Ch 1

 throttle” menu.

of this manual for a full explanation of the digital trims.

Around the mid-point of the collective pitch stick the

model should lift off the ground and hover at approxi-

mately the rotational speed you wish to use. If this is not

the case, correct the settings as follows:

1. The model does not lift off until the collective

pitch stick is above the centre point.

a) Rotational speed too low

Remedy: on the “Ch 1

 throttle” graphic page,

increase the value at Point

+100%

OUTPUT

2 3 4 51

Control travel

Hover

point

b) Rotational speed too high

Remedy: on the “Collec-

tive pitch” graphic page,

increase the blade pitch

angle for collective pitch

by increasing the value at

Point 3.

+100%

OUTPUT

2 3 4 51

Control travel

Hover

point

2. The model lifts off below the centre point.

a) Rotational speed too high

Remedy: on the “Ch 1

 throttle” graphic page,

reduce the throttle opening

by reducing the value at

Point 3.

+100%

OUTPUT

2 3 4 51

Control travel

Hover

point

b) Rotational speed too low

Remedy: on the “Collective

pitch” graphic page, re-

duce the blade pitch angle

by reducing the value at

Point 3.

+100%

OUTPUT

2 3 4 51

Control travel

Hover

point

Important:

It is important to persevere with this adjustment pro-

cedure until the model hovers at the correct rotational

speed at the centre point of the throttle / collective pitch

stick. All the other model settings depend upon the cor-

rect setting of these parameters!

The standard set-up

The remainder of the standard adjustment procedure

is completed on the basis of the fundamental set-up

which you have just carried out, i. e. we now assume that

the model hovers in normal ﬂight at the centre point of

the throttle / collective pitch stick, with the correct rotor

speed. This means that your model helicopter is capable

of hovering and also ﬂying circuits in all phases whilst

maintaining a constant system rotational speed.

The climb setting

The combination of throttle hover setting, collective pitch

setting for the hover and the maximum collective pitch

setting (Point 5) now provides you with a simple method

of achieving constant system rotational speed from the

hover right to maximum climb.

Start by placing the model in an extended vertical climb,

holding the collective pitch stick at its end-point: motor

speed should not alter compared with the hover setting.

If motor speed falls off in the climb, when the throttle is

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Graupner MX-16 HoTT Seite 121

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