Bedienungsanleitung Graupner MC 22S (Seite 146 von 180) (Englisch)

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Programming examples – Fixed-wing models

F3A model aircraft

F3A models belong to the category of powered ﬁ xed-

wing model aircraft designed for competition ﬂ ying.

They may be powered by an internal combustion en-

gine or an electric motor. Electric-powered models

are eligible to ﬂ y in the international F3A “pattern”

class, and also in the F5A electric aerobatic class.

On page 120, where the section on ﬁ xed-wing model

programming starts, you will ﬁ nd general notes regar-

ding installing and setting up the RC system in a mo-

del, and – of course – all this information also applies

to F3A models, and therefore does not need to be re-

peated at this point.

If an F3A model is accurately built, it usually exhi-

bits ﬂ ying characteristics which are almost comple-

tely neutral. The perfect aerobatic model has a very

smooth but precise control response, and any move-

ment around any one of its ﬂ ight axes should not af-

fect the other axes.

F3A models are ﬂ own using aileron, elevator and rud-

der controls. The use of separate servos for each ai-

leron is almost universal with these aircraft. The ﬂ ying

controls are supplemented by control of motor po-

wer (throttle function) and in many cases a retractab-

le undercarriage. As a result the servo assignment for

channels 1 to 5 is no different to the ﬁ xed-wing mo-

dels we have already described.

The auxiliary function “Retracts” is usually assigned

to one of the auxiliary channels 6 to 9. Ideally the re-

tracts are operated using a switch without a centre

detent. An optional “extra” – used only if necessary –

is mixture adjustment control for the carburettor. This

is generally controlled by a slider on the transmitter

connected to one of the auxiliary channels otherwise

not in use.

When assigning functions to the auxiliary channels at

the transmitter, it is advisable to ensure that the con-

trols required are within easy reach, since the advan-

ced aerobatic pilot has very little time to think about

letting go of the sticks – especially when ﬂ ying under

contest conditions.

Programming

The basic programming of the transmitter has alrea-

dy been described in detail in the section starting on

page 122, so this section concentrates on tips speci-

ﬁ c to F3A models.

In the menu ...

»Servo adjustment« (page 56)

S e r v o 1 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %

S e r v o 2 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %

S e r v o 3 = > 0 % 1 0 0 % 1 0 0 % 1 5

0 % 1 5 0 %

S e r v o 4 = > 0 % 1 0 0 % 1 0 0 % 1 5 0 % 1 5 0 %

R e v c e n t . - t r a v e l + - lim i

t +

S E L

S E L S Y M A S Y S Y M

A S Y

… you can adjust the servo settings to suit your mo-

del. It has proved advisable to use at least 100% ser-

vo travel, as precision of control can be perceptib-

ly improved if relatively large servo travels are em-

8/Batt.

izer-MICRO-SUPERHET

1 6

Best.-Nr.

7052

anal 60-282/182-191

s 35MHz/35MHz-B-Band

Made in Malaysia

S C A N

! #

Receiver battery

Y-lead, Order No. 3936.11 or 3936.32

Auxiliary function

Mixture adjustment

Retracts

Right aileron servo

Rudder servo

Elevator servo

Aileron servo or left aileron servo

Throttle or speed controller (electric motor)

ployed. This should be borne in mind when building

the model and designing the control surface linkages.

Check the direction of servo rotation, and take care to

set the servo centres accurately at the mechanical le-

vel.

Any minor corrections required can be made in the

3rd column of the »Servo adjustment« menu during

the ﬁ rst few test-ﬂ ights.

The next step is to select the menu ...

»Model type« (page 52)

… and select “Throttle min forward / back” in the “Mo-

tor” line to activate the idle trim for Channel 1 (nor-

mally “back”; i.e. full throttle forward). The digital trim

now works only at the idle end of stick travel.

The “cut-off trim” (page 32) enables you to switch im-

mediately from the “motor stopped” position to the

idle position you have previously set, just be applying

a single “click” on the trim lever.

The remaining settings can be left as shown in the il-

lustration.

Once you have test-ﬂ own the model and trimmed

it out carefully, we recommend that you reduce the

trim travel for elevator and ailerons. The model then

responds much more smoothly to any change you

make using the trim levers. This avoids “over-trim-

ming” the model; with full trim travel a single trim in-

crement can have too powerful an effect: if the model

tends to pull left, one click of the trim causes it to pull

right.

If necessary, reduce the increment size of the digital

trims in the menu ...

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