21
7.4 Mode 4 - Helicopter
KOSMIK RPM pre selection
...
KOSMIK downward
KOSMIK upward
bail out
The heli mode operates with real RPM control
(governor). The motor RPM speed is kept
constant as long as the performance of the battery
and motor are sufficient for it. The ESC stores all
parameters of the program, such as the ratio of
selected RPM and the rotor’s speed at every
battery change. Activating the "Governor Store,"
function via programming unit the KOSMIK reads
all parameters only once. During the first start-up
after programming, these parameters are then
permanently stored.
In mode 4 the ESC reads all parameters (such as
the ratio between selected RPM in the transmitter
and active rotor-RPM) only once. The parameters
remain stored, beginning with the first start of the
motor.
Using different batteries with equal number of
cells leads to steady RPM even when changing
the battery.
Different cell numbers of the battery pack cannot
be compensated yet.
Therefore, in mode 4 with governor store activated
it is not permitted e.g. to program with a 10 S
battery and operating the same RPM with a 12 S
battery afterwards.
When changing the set-up (motor, trans-
mission, rotor blades etc.) mode 4 must be
reprogrammed at each time!
Autorotation (bail out) is implemented in mode 4.
It cannot be selectively programmed with or
without AR.
Under voltage slow down (deep discharge pro-
tection
) is active, therefore the motor’s RPM is
turned down, when the adjusted battery discharge
voltage is reached (see chap. 3.4). Smooth start
is at 12 s on default, but can be adjusted with a
programming unit from 8 up to 60 s. The BEC-
voltage can be changed in 0.1 / 0.2 V steps
between 5 V and 8 V in combination with the
KONTRONIK programming unit and K-KONFIG or
as written in chap. 7.6.
Preparing the transmitter
With a flight phase switch different RPM mode are
available on the throttle channel. Depending on its
position different RPM can be retrieved.
Example Set-up for Heli mode:
Start / motor off:
0%
Hover (Idle 1):
60%
Scenic flight (Idle 2):
70%
3D-flight
80%
Always a minimum of 20% reserve for the
ESC should be planed, otherwise a
sufficient RPM control is not ensured when
battery voltage decreases.
For the AR position (mode 4 only) a preset switch
of 25% throttle is to be set in the transmitter.
By setting this pre-switch the AR function is fully
prepared and no further settings are necessary for
using AR in mode 4. For further information of
transmitter
programming,
please
see
the
transmitter’s manual.
Programming Mode 4:
For AR mode use there is in addition to 100% (full
throttle) and 0% (motor off) position a third, the
AR-on-position at 25% necessary.
Step 1: For the following Mode-programming only
two positions on this previously prepared switch
are needed:
Position 1 =
0%
motor off
Position 2 =
100% full throttle
2
1
Check programming
afterwards!
Before starting check at the transmitt
er’s display
whether the percentages are approached properly
(see also from chap. 3.1 on).
1. Switch on the transmitter and slide the prepared
switch to position motor off (0%).
2. Connect the BEC cable to the
receiver’s jack
(throttle function) and the other side into the
KOSMIK's jack that is marked
Master
. Then
switch on the transmitter.
3.
Connect the motor cables to the motor (pay
attention to the motor’s direction of rotation, e.g.
exchange two of the motor cables or exchange
via programming unit.
4.
Connect the main battery to the KOSMIK.
5.
Mode-LED (LED 1) flashes green. You will hear
an ascending triad of sounds, monitoring the
activation. Ongoing you will hear single tones
for the recognized number of cells (see chap.
4.1).
!
!
