Manual Graupner MC 22S (page 156 of 180) (English)

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In the “normal” ﬂ ight phase the speed governor

should always be switched off! This phase is used pri-

marily for checking the motor and other general set-

tings.

You can achieve this by selecting the “Input 8” line

using the rotary control: check and correct the trans-

mitter control assignment if necessary, then reduce

the control travel symmetrically to zero initially, before

shifting the “Offset” to -100% (max. -125%).

Call up the »Servo display« menu, and check that

the indicated “servo travel” of channel 8 stays ﬁ xed at

-100% (or max. -125%) regardless of the position of

the transmitter control. The switch module now has no

inﬂ uence on the governor, which is what we want: the

requirement is that the governor should be switched

off at the -100% setting.

For this example we wish to set a low hover speed of

around 1350 rpm for the “hover” ﬂ ight phase (Phase

2). This is achieved as follows: switch to the appropri-

ate ﬂ ight phase and select “Input 8” again. The current

ﬂ ight phase is displayed at bottom left on the screen.

Move the switch module to the “forward” position,

which equates to “speed governor active”. Since in-

puts 5 … 8 have to be assigned separately for each

ﬂ ight phase, start once again by checking and correc-

ting the transmitter control assignment before selec-

ting the ASY ﬁ eld in the “Travel” column, where you

set the value to 0%.

You may need to change this value, depending on

the type of governor. Later you will need to use a rev

counter to set the rotor speed accurately. If you ﬁ nd

Programming examples – Model helicopters

you have to set a value below the 0 point, you will

need to alter the value in the “Offset” column.

Repeat the procedure in ﬂ ight phase 3 (Acro), this

time with a percentage value of around 40% to provi-

de a high rotor speed for aerobatics. Once again, this

value will vary according to the type of governor you

are using.

This method of programming the system to include a

speed governor is comparatively simple, but it does

provide a reliable method of calling up individual ﬂ ight

phases which are set to different rotational speeds.

The switch module or slider must always be left in the

“forward” position. Nevertheless, you can still switch

off the speed governor at any time, in any ﬂ ight pha-

se, simply by moving the switch module to its “back”

position.

If you have set up your helicopter as described in this

programming example, you will ﬁ nd that it is capable

of carrying out extremely challenging ﬂ ight tasks even

though it is no competition machine. We suggest that

you should not make use of additional functions un-

til your model is ﬂ ying perfectly, so that you will be in

a position to recognise and appreciate any improve-

ments. It is always best to implement additional reﬁ -

nements one at a time whenever possible, otherwi-

se you won’t know which change has brought about

any improvement. Bear in mind that the good pilot is

not recognised by the number of complex functions

which he can manage successfully, but by the results

he can obtain when ﬂ ying a helicopter with a relatively

simple set-up.

+ 1 0 0

+ 1 2 5

+ 1 0 0 %

- 1 0 0 %

- 1 0 0

- 1 2 5

The transmitter control travel corresponds

to the graph shown here.

Control travel 8 

Output 

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Graupner MC 22S Manual

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