Helicopter Models - GRAUPNER HoTT MC-16 Series Programming Manual

Helicopter models

The advanced developments incorporated into the
transmitter as well as those now in helicopter models
and their components like gyros, speed regulators,
rotor blades, etc. make it possible to master a heli-
copter even in 3D acrobatic flight. On the other hand,
a beginner needs only a few settings to get started
with hovered flight training then, step-by-step, take
advantage of HoTT transmitter features with increas-
ing expertise.
All current model helicopters with one to four collec-
tive pitch servos can be operated using the programs
mc-16
provided by the HoTT and
Six flight phases plus autorotation are available within
a model memory, see menus »Control adjust«,
»Phase settings« and »Phase assignment«.
As with winged aircraft, here too, in addition to the
basic screen's standard timers there are additional
timers as well as a lap counter with flight-phase-
dependent stopwatch functionality which are avail-
able for selection (menus »Timers (general)« and
»Fl. phase timers«).
Depending on the transmitter, it is possible to store
the digital trims in "flight phase specific" or "global"
form – for all flight phases; this does not apply to col-
lective pitch / throttle trim. C1 trim permits easy loca-
tion of an idle setting.
74 Helicopter models
The control assignments for inputs 5 ... 8 respec-
tively 5 ... 12 is made separately for each flight phase
(»Control adjust« menu).
A flight phase copy function is helpful during flight tri-
als (»Copy / Erase« menu).
"Dual Rate" and "Exponential" functions can be cou-
pled for roll, nick and tail rotor and programmable in
two variations in every flight phase.
There are 8 freely assignable linear mixers. There are
also 4 curve mixers that can be programed and these
can also be switched on or off, depending on the
mc-20
HoTT.
flight phase, in the »MIX active/phase« menu. Four
dual mixers are also available (»Dual mixers« menu,
provided as standard on the
ter only, but can be unlocked as an extra-cost option
mc-16
in the
The »Helicopter mixer« menu provides flight-phase-
dependent 6-point curves for the non-linear charac-
teristics pitch, throttle and tail rotor mixer as well as
two independent swashplate mixers each for roll and
nick. Independent of this, the control curve of the
channel 1 stick can be defined with up to a total of 6
points in every flight phase. The beginner will initially
only adapt the hover flight point to the control middle
for the non-linear characteristics.
Swashplate
Roll Throttle
Pitch-Axis
Channel 1
mc-20
HoTT transmit-
HoTT transmitter).
Collective
Pitch Curve
Rotation
Throttle
Throttle
Pre-programmed mixers in the »Helicopter mixer«
menu:
1. Pitch curve (6-point curve)
2. C1  throttle (6-point curve)
3. Channel 1  tail rotor (6-point curve)
4. Tail rotor  throttle
5. Roll  throttle
6. Roll  tail rotor
7. Pitch-axis  throttle
8. Pitch-axis  tail rotor
9. Gyro suppression
10. Swashplate rotation
11. Swashplate limiter
The "Throttle limit" function (input "Lim." in the »Con-
trol adjust« menu) allows the motor to be started in
any flight phase. The right-side proportional rotary
slider is assigned to input "Lim." by default. This "throt-
tle limiter" establishes – depending on its given posi-
tion – the maximum possible throttle servo position.
This makes it possible for the motor to be controlled
in the idle range, if necessary even by the proportion-
al regulator. The throttle curves become effective only
when the proportional regulator is pushed toward the
full throttle direction.
i
Roll
Pitch-Axis
Channel 1
Tail Rotor
Tail Rotor
Tail Rotor