GREAT PLANES SU-31 Manuel d'instruction - Page 14
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Balance the Model Laterally
1. With the wing level, have an assistant help you lift the
model by the motor propeller shaft and the bottom of the
fuse under the TE of the fin. Do this several times.
2. If one wing always drops when you lift the model, it
means that side is heavy. Balance the airplane by adding
weight to the other wing tip. An airplane that has been laterally
balanced will track better in loops and other maneuvers.
PREFLIGHT
Identify Your Model
No matter if you fly at an AMA sanctioned R/C club site or if
you fly somewhere on your own, you should always have
your name, address, telephone number and AMA number
on or inside your model. It is required at all AMA R/C club
flying sites and AMA sanctioned flying events. Fill out the
identification tag on the back cover of this manual and place
it on your model.
Charge the Transmitter Batteries
Follow the instructions that came with your radio to charge
the batteries the evening before you plan to fly. You should
always charge the transmitter batteries before flying and at
other times as recommended by the radio manufacturer.
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.
Before you fly you should perform one last overall inspection
to make sure the model is truly ready to fly and that you
haven't overlooked anything. If you are not thoroughly
familiar with the operation of R/C models, ask an
experienced modeler to perform the inspection. Check to
see that you have the radio installed correctly and that all the
controls are connected properly. The motor must also be
checked by confirming that the prop is rotating in the correct
direction and the motor sounds like it is reaching full power.
Make certain all control surfaces (elevators, rudder,
ailerons) are secure, the pushrods are connected, the
controls respond in the correct direction, radio components
are securely mounted and the C.G. is correct.
Ground check the operational range of your radio before the
first flight of the day. With the transmitter antenna collapsed
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, scarfs, long hair or loose objects such as
pencils or screwdrivers that may fall out of shirt or jacket
pockets into the prop.
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