Bedienungsanleitung Graupner MX-16 HoTT (Seite 189 von 200) (Englisch)

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Programming example: model helicopter

“Auto-rotation” line using the arrow buttons  of the

left or right-hand touch-key, brieﬂy touching the central

SET button of the right-hand touch-key, and then moving

one of the two-position switches (SW 2 or 8) to the “ON”

setting. The switch number (in our example “2”) now

appears on the right of the screen.

rear

5:00

–––

phase 2

phase 3

hover

speed

pitch min

timer

autorotat.

This switch should be located at a position on the trans-

mitter where you can easily reach it without letting go of

the stick, e. g. above the collective pitch stick.

Note:

For more information on setting up this “emergency OFF

switch” please refer to the section in the centre column

of the following page.

And another tip:

Please make it a habit to give all the switches a common

“on” direction; then a quick glance at the transmitter

before ﬂying will soon reassure you that all switches are

“off”.

If you wish, you could at this point move up two lines

and assign a ﬂight phase switch for ﬂight phase 2, which

is already assigned the name “Hover”, but this simple

programming example deliberately excludes such reﬁne-

ments.

You have now completed the basic settings at the

transmitter, i. e. the procedure which you will need to use

time and again when setting up a new model. The actual

helicopter-speciﬁc set-up is carried out primarily in the …

“Heli mixers” menu (pages 114 … 125).

ch1

ptch

thro

tail

normal

gyro

inp8 0%

In the very ﬁrst line you will see the “Collective pitch”

function, and a brief press on the central SET button of

the right-hand touch-key takes you to the appropriate

sub-menu. At this point you will see a graphic represen-

tation of the collective pitch curve. This is initially deﬁned

by only three reference points, and in most cases this is

quite adequate.

Tip:

Always try to manage with these three reference points

initially, as additional points just complicate matters,

and extra complexity is just what you don’t need at the

moment.

The reference point for hovering should generally be the

mechanical centre-point of the collective pitch stick, as

this position feels completely natural to most pilots. You

can, of course, set up the curve to locate the hover at a

different point, but you should not be tempted to do this

unless you know exactly what you are doing. Start by

setting the collective pitch stick to centre. Assuming that

you previously adjusted the servos in accordance with

the manufacturer’s instructions, the servo output arms

will now (usually) be at right-angles to the servo case.

If you have not already done so, adjust the mechani-

cal linkages to the rotor head so that all the blades are

set to a collective pitch angle of 4° to 5° positive for the

hover. All known helicopters will ﬂy at this setting.

Now push the collective pitch stick fully forward to the

maximum collective pitch point (the full-length vertical

line indicates the current position of the stick). Adjust

Point 5 on the collective pitch curve using the arrow but-

tons of the right-hand touch-key, with the aim of obtain-

ing a maximum collective pitch setting of around 9° at

the main rotor blades. This point should be at a value of

around +50%.

Note:

A rotor blade set-up gauge, e. g. the Graupner item,

Order No. 61, is very useful when setting up blade pitch

angles, as you can read off the angles directly.

Now pull the collective pitch stick right back to the

collective pitch minimum position. Set the blade pitch

angle for Point 1 to 0 to -4°, depending on your piloting

ability. This produces a graph line with a slight angle at

the hover point, forming what is known as the collective

pitch curve. It might look approximately like this:

input

output

point

–100%

–80%

ptch

normal

If you now switch to the auto-rotation phase - you will

see the name of the ﬂight phase “Autorot” at bottom left

on the screen - the “old” collective pitch curve will re-ap-

pear. In this phase you should set the same values as in

the normal phase, with the following exception: increase

the pitch angle at Point 5 (collective pitch maximum) by

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