Great Planes Yak-54 3D Indoor EP ARF - GPMA1131 - Manual (Page 20)

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CAUTION: Unless the instructions that came with your
radio system state differently, the
initial charge on new
transmitter and receiver batteries should be done for
15 hours
using the slow-charger that came with the
radio system. This will “condition” the batteries so that
the next charge may be done using the fast-charger
of your choice. If the initial charge is done with a fast-
charger the batteries may not reach their full capacity
and you may be flying with batteries that are only
partially charged.
Balance Propellers
Carefully balance your propeller and spare propellers
before you fly. An unbalanced prop can be the single most
significant cause of vibration that can damage your model.
Not only will motor mounting screws and bolts loosen,
possibly with disastrous effect, but vibration may also
damage your radio receiver and battery.
We use a Top Flite Precision Magnetic Prop Balancer
(TOPQ5700) in the workshop and keep a Great Planes
Fingertip Prop Balancer (GPMQ5000) in our flight box.
Range Check
Ground check the operational range of your radio before
the first flight of the day. With the transmitter antenna
collapsed, or with the power down mode activated, and the
receiver and transmitter on, you should be able to walk at
least 100 feet away from the model and still have control.
Have an assistant stand by your model and, while you work
the controls, tell you what the control surfaces are doing.
Repeat this test
with the motor running at various speeds
with an assistant holding the model, using hand signals
to show you what is happening. If the control surfaces do
not respond correctly,
do not fly! Find and correct the
problem first. Look for loose servo connections or broken
wires, corroded wires on old servo connectors, poor solder
joints in your battery pack or a defective cell, or a damaged
receiver crystal from a previous crash.
MOTOR SAFETY PRECAUTIONS
Failure to follow these safety precautions may
result in severe injury to yourself and others.
Get help from an experienced pilot when learning to
operate motors.
Use safety glasses when starting or running motors.
Do not run the motor in an area of loose gravel or sand; the
propeller may throw such material in your face or eyes.
Keep your face and body as well as all spectators away
from the plane of rotation of the propeller as you start and
run the motor.
Keep these items away from the prop: loose clothing, shirt
sleeves, ties, scarves, long hair or loose objects such as
pencils or screwdrivers that may fall out of shirt or jacket
pockets into the prop.
LITHIUM BATTERY HANDLING AND USAGE
WARNING!! Read the entire instruction sheet included
with your battery. Failure to follow all instructions
could cause permanent damage to the battery and its
surroundings, and cause bodily harm!
•
ONLY use a LiPo approved charger. NEVER use a
NiCd/NiMH peak charger!
•
NEVER charge in excess of 4.20V per cell.
•
ONLY charge through the “charge” lead. NEVER
charge through the “discharge” lead.
•
NEVER charge at currents greater than 1C.
•
ALWAYS set charger’s output volts to match battery
volts.
•
ALWAYS charge in a fireproof location.
•
NEVER trickle charge.
•
NEVER allow the battery temperature to exceed
150° F (65° C).
•
NEVER disassemble or modify pack wiring in any
way or puncture cells.
•
NEVER discharge below 2.5V per cell.
•
NEVER place on combustible materials or leave
unattended during charge or discharge.
•
ALWAYS KEEP OUT OF REACH OF CHILDREN.