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2. With all parts of the model installed (ready to fly), place

the model on a Great Planes CG Machine, or lift it at the

balance point you marked.

3. If the tail drops, the model is "tail heavy" and the battery

pack and/or receiver must be shifted forward or weight must

be added to the nose to balance. If the nose drops, the

model is "nose heavy" and the battery pack and/or receiver

must be shifted aft or weight must be added to the tail to

balance. If possible, relocate the battery pack and receiver

to minimize or eliminate any additional ballast required.

Begin by placing incrementally increasing amounts of

weight on the airplane until the model balances. Once you

have determined the amount of weight required, it can be

permanently attached.

Note: Do not rely upon the adhesive on the back of the lead

weight to permanently hold it in place. Use #2 sheet metal

screws, RTV silicone or epoxy to permanently hold the

weight in place.

4. IMPORTANT: If you found it necessary to add any

weight, recheck the C.G. after the weight has been installed.

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 page and place it on or inside your model.

Charge the Batteries

Follow the battery charging instructions that came with your

radio control equipment to charge the transmitter battery.

You should always charge your transmitter batteries the

night before you go flying, and at other times as

recommended by the radio manufacturer.

Balance the 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.

Ground Check

If the motor is new, follow the motor manufacturer's

instructions to break-in the motor. After break-in, confirm

that the motor transitions smoothly and rapidly to full power

and maintains full power-indefinitely. After you run the motor

on the model, inspect the model closely to make sure the

prop is secure and all pushrods and connectors are secure.

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