Convenient support is provided for up to four aileron
servos and four flap servos on normal models or, for
V-tail and flying wing/delta models, up to two aileron/
elevator servos plus four flap servos.
The majority of motorized and glider models belong to
the tail unit type “normal” and are equipped with one
servo each for elevator, rudder and ailerons in addition
to a motor throttle or electronic speed controller (or for
brake flaps in the case of a glider model). Beyond this,
tail unit type “2 HR Sv 3+8” permits the connection of
two elevator servos to receiver outputs 3 and 8.
“V-tail” is to be selected from the »Model type« menu if
the model has a V-tail instead of a “normal” tail. This V-
tail option provides coupled control functions for eleva-
tor and rudder such that both tail flaps – each controlled
by a separate servo – are able to handle both elevator
and rudder functionality.
For delta and flying wing aircraft models, aileron and
elevator functionality is affected by way of a common
rudder flap on the trailing edge of each side (right and
left) of the wing. The program contains appropriate
mixer functions for both servos.
If ailerons, and conditionally the flaps, are each actu-
ated with two separate servos then settings can be
made for differentiated control of all aileron and flap
pairs in the »Wing mixers« menu, i. e. settings for
downward rudder throw independent of upward throw.
And finally, the ideal method of controlling flap positions
is to use one of the two INC/DEC transmitter controls,
which are fitted as standard on the
mc-20 HoTT
transmitter only.
Alternatively, there is a phase-dependent trim function
available for flaps, ailerons and elevators in the »Phase
trim« menu.
Up to 7 flight phases can be programmed into each of
the 20 respectively 24 model memory locations.
Except for C1 trim, digital trim will be stored on a flight-
phase basis. C1 trim permits easy location of a carbu-
rettor idle setting.
Two timers are always available for flight operation. The
transmitter operating time expired since the last battery
charge is also displayed.
All transmitter controls and switches can be assigned
in the »Control adjust« menu to inputs 5 … 8 respec-
tively 5 … 12 with almost no restrictions.
The “Dual Rate” and “Exponential” functions for ailer-
ons, rudder and elevators are separately programmable
and each are convertible between the two variations on
a specific flight-phase basis.
In addition to eight freely assignable linear mixers, four
curve mixers (»Free mixers« menu) and four dual
mixers (»Dual mixers« – available as standard on the
mc-20 HoTT transmitter only), flight-phase specific
six-point curves are available for control channel 1
(throttle / brake); see »Channel 1 curve« menu.
Depending on the number of wing servos, fixed-defini-
tion mix and coupling functions can be selected from a
list in the »Wing mixers« menu.
• Multi-flap menu: control of flaps as ailerons, the
influence aileron trim on flaps controlled as ailerons,
flap differentiation, flap function throw magnitude for
all aileron and flap pairs, ailerons controlled as flaps,
elevator mixer flaps
• Brake settings: butterfly, differential reduction, eleva-
tor curves
• aileron rudder mixer
• flaps elevator mixer
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