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Graupner MC 32 HOTT Manual

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288 Programming examples - Winged models
mc-32 HoTT programming
Preparatory measures based on the example of a winged model
Programming models in an mc-32 HoTT is
easier than it may appear at rst!
The primary prerequisite for "clean" programming,
and this applies not only to the mc-32 HoTT but is
also a principle for all programmable transmitters, is a
mechanically correct installation of all remote control
components in the model! Therefore, it should be en-
sured no later than on connection of the linkages that
the servos are in their respective neutral position and
their rudder lever is also in the desired position. Oth-
erwise you should loosen the rudder and re-fasten it
with an offset of a few lobes. If servos are positioned
with the help of a servo tester, e. g. RC tester, No.
2894.12, then the "correct" positions can be deter-
mined very easily.
The possibility of changing the neutral position of a
servo in practically every modern transmitter is only
intended for ne-tuning. Greater deviations from "0"
can result to further asymmetries in the course of
the further signal processing in the transmitter. In the
same manner: A car with a bent chassis does not get
any straighter if only the steering wheel is trimmed to
"straight"!
An additional important point is the adjustment of the
rudder paths: This should take place through a corre-
sponding adjustment of the steering points, insofar as
possible. Ultimately this is far more efficient than exten-
sive efforts with the path adjustments in the transmit-
ter! In this case: Path adjustments serve first and fore-
most for to compensate for the manufacturer-stipulated
tolerances for the servos and their ne-tuning, and less
for the compensation of carelessness.
If two separate aileron servos are used for a winged
model, the ailerons, controlled through the corre-
sponding activated wing mixer – see the following
pages – can be assigned with both the flap function
and raised with the brake flaps – however this would
make more sense in a glider or electro glider than in
a motor model.
In this case the rudder arms – starting from the neutral
position – should be tilted forward one lobe, pointing
toward the nose, set to the respective servo.
The mechanical differentiation achieved through this
asymmetric assembly contributes to the fact that the
brake effect of the elevated ailerons increases with
their deflection and, therefore, does not normally
require a greater path upward than downward.
Correspondingly, when planning to operated sepa-
rately controlled flap servos, they should also be
integrated into a crow system.
Since the brake effect of this flap position referred to
as a "crow position" is influenced less by the elevated
ailerons than the downward deflection of the flaps,
the rudder arms should be installed somewhat toward
the rear in this case, tilted toward the trailing edge. As
a result, there is a greater available path for the down-
ward deflection. With such a combination of lowered
flaps with raised ailerons, however, the latter should
only be elevated moderately, because they have more
of a stabilizing and controlling function than a braking
function in this type of crow system.
A "tip" for seeing the brake effect in this connection:
lift the flaps and look over and under the surface from
the front. The greater the projected surface of the
protruding rudder, the greater the brake effect.
Outboard ailerons
Inboard camber-changing flaps
(Similar asymmetric installation of rudder arms can
be meaningful, e. g. for open-cowl flaps or landing
flaps, even in a motorized model.)
If a model is completed and mechanically attuned in
this respect, you can basically begin with the program-
ming of the transmitter. The following examples, an
attempt is made to follow the practice of first describ-
ing the general basic settings and then fine-tuning or
specializing them in the subsequent steps.
… 288 …


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