GREAT PLANES EP YAK 55 3D ARF 사용 설명서 - 페이지 13

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fuselage. The C.G. is located 3

leading edge of the wing.

This is where your model should balance for the first

flights. Later, you may wish to experiment by shifting the

C.G. up to 1/2

[13mm] forward or 1/2

change the flying characteristics. Moving the C.G. forward

may improve the smoothness and stability, but the model

may then require more speed for takeoff and make it

more difficult to slow for landing. Moving the C.G. aft

makes the model more maneuverable, but could also

cause it to become too difficult to control. In any case,

start at the recommended balance point and do not at

any time balance the model outside the specified range.

2. With all parts of the model installed, including the

battery (ready to fly) lift it upside-down on your fingertips 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. If additional weight is required, begin by placing

incrementally increasing amounts of weight on the bottom of

the fuse until the model balances. Once you have

determined the amount of weight required, it can be

permanently attached.

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

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

permanently 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

[76.2mm] back from the

[13mm] back to

flying sites and AMA sanctioned flying events. Fill out the

identification tag on the decal sheet and place it on or inside

your model.

Charge the Batteries

Follow the battery charging instructions that came with your

radio control system to charge the batteries. You should

always charge your transmitter batteries the night before

you go flying, and at other times as recommended by the

radio manufacturer.

Charge the flight battery using a charger designed for

Lithium-Polymer batteries. Charging with any other type of

charger is very dangerous, and may cause the batteries to

combust violently.

CAUTION: Unless the instructions that came with your

radio system state differently, the initial charge on new

transmitter 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 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

and 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

Range Check

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

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(GPMQ5000) in our flight box.

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