Great Planes ElectriCub Kit - GPMA0156 - Manual (Page 45)

fuse wire melts). If the fuse blows, turn off the toggle switch,
disconnect the battery and check the condition of the wires,
replacing any that are damaged. Replace the fuse with a
fuse rated no higher than 25 amps. Never operate the
system without a fuse. Doing so could result in a fire,
causing property damage and personal injury.
5. The ideal power source for the S-600 direct drive system
is a 7-cell, 8.4 volt 1700 - 2000 mAh battery pack. The use
of a higher voltage battery may reduce the motor life. The
ideal power source for the T-600GD gear drive system is a
7-cell, 8.4 volt 1700 - 2000 mAh battery pack, but an 8-cell,
9.6 volt battery pack will also work well.
6. We have done extensive motor/propeller testing and have
found that the 8 x 4 prop included with the S-600 motor
system works well, providing 4-5 minutes of flight time.
With the T-600GD gear drive system we found that the Master
Airscrew 10 x 8 electric prop provided 6-8 minutes of very good
flight performance.
1. A new battery pack should be “cycled” for best results.You
should peak charge the battery, then discharge it almost
completely by actually running your motor with the propeller
attached. Do this 3 or 4 times on the ground before actually
flying. Be sure you remove the battery from the airplane
between each cycle and allow it to cool before recharging.
2. The wires supplied with your motor/micro switch are long
enough to allow the micro switch to be mounted on the
servos for ease of installation. You may reduce the electrical
resistance of the switch harness by shortening the wires,
resulting in an increase in motor power. The micro switch
can be mounted in front of former F-2A and operated by a
pushrod from the throttle servo.
3. The switch harness wire can also be replaced with larger
high performance 12 or 13 gauge wire. This type of wire is
normally multi-strand (600 to 700 strands). The larger the
wire, the less resistance in the wire.
4. The standard Tamiya battery connectors supplied with
your switch harness are adequate for most installations.
However, if you are looking for maximum performance, you
may want to consider installing high-performance battery
connectors such as DuraTrax
® Powerpole ™ connectors or
Astro Flight Zero Loss connectors.
5. Examine your propeller for irregularities caused by the
injection molding process. Carefully remove the imperfections
with fine sandpaper. Also, make sure your propeller is
balanced. Vibration from the propeller will decrease the
performance and life of the motor.
6. If you are taking off from a hard surface, the wheels must
spin freely. Check the wheels for binding when moved from
side to side and put a drop of oil on each axle (including the
tail wheel). If you store your ElectriCub resting on its wheels,
the wheels may develop “flat spots,” which prevent them from
rolling smoothly. This can be a problem when using light
weight foam wheels. To avoid this problem, store your
airplane on an airplane stand or hanging from the ceiling.
Follow the battery charging procedures in your radio instruction
manual. You should always charge your transmitter and
receiver batteries the night before you go flying and at other
times as recommended by the radio manufacturer.
Carefully balance your propellers before flying. An
unbalanced prop is the single most significant cause of
vibration which may damage your radio receiver, battery
and motor.
We use a Top Flite Precision Magnetic Prop Balancer ™
(TOPQ5700) in the workshop and keep a Great Planes
Fingertip Balancer (GPMQ5000) in our flight box.
Balance the Propeller
Charge the Radio Batteries
At this time check all connections including servo horn
screws, clevises, servo cords and extensions. Make sure
you have installed the silicone retainers on all the clevises.
PREFLIGHT
PERFORMANCE TIPS
45