20
WARNING:
Never have the motor battery connected
to the ESC without the transmitter turned on – after
each fl ight (or any time after running the motor)
always
disconnect the battery
before
turning off the transmitter.
And when ready to fl y (or whenever running the motor
for any reason), always turn on the transmitter fi rst
before connecting the motor battery.
Also make certain your
failsafe
is activated and programmed
correctly according to your radio manufacturer’s instructions.
Motor/Propeller Discussion
The recommended Rimfi re .32 is rated for 50A constant
current and 80A surge current. Powered by a 4S LiPo on
an APC 13 x 8E it draws about 58A static and momentary,
maximum peaks of about 50 – 55A in the air, but averages
a little less than 20A through a “normal” fl ight. This is a
suitable propeller choice and fl ies the Sbach well. Another
suitable propeller choice is the APC or Xoar 14 x 7 which
provides slightly more thrust at the expense of a little speed
which is okay for this type of plane. You can experiment
with different propeller choices in this range as long as
they do not exceed the current specifi cations of the motor
and ESC.
Typical fl ight time may be as low as 4 minutes or over 8
minutes depending on how aggressive and active you are
with the throttle – more throttle means shorter fl ight times.
Use a fl ight timer initially set to a conservative time (4
minutes for example). When the timer sounds, land. Use
a LiPo checker (shown above) to measure the resting
(unloaded) voltage when you land. The voltage should not
be below 3.75V/cell. When you charge the battery also
note how much capacity it took to recharge (indicating how
much was used for the fl ight). Aim to use no more than 80%
of the battery’s capacity. Adjust your timer according to the
voltage and capacity used for the fl ight.
You can also use the worksheet on page 22 to determine
optimum fl ight times based on your fl ying style and
battery capacity.
CAUTION:
Never run the motor on the ground for more
than a few seconds. Otherwise, you may overload the
motor, battery or ESC.
Battery Precautions
Charge and store LiPo batteries in a safe place!
Never leave charging LiPo batteries unattended!
Before mounting the motor and setting up the ESC
and battery, read the following important battery
precautions:
IMPORTANT:
If using multiple battery packs that are
connected with an adapter, never charge the batteries
together through the adapter. Always charge each
battery pack separately. Charge the batteries, then
read the following precautions on how to connect
multiple packs for fl ying the model:
Battery Precautions:
There are two ways to connect multiple battery packs:
In
Series
and in
Parallel
.
Содержание Sbach
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