GREAT PLANES J-3 ElectriCub 사용 설명서 - 페이지 14

{카테고리_이름} GREAT PLANES J-3 ElectriCub에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. GREAT PLANES J-3 ElectriCub 20 페이지. Electric sport-scale arf

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Propeller Installation

Prior to balancing the model install the propeller.

Balance the Model (C.G.)

More than any other factor, the C.G. (balance point) can

have the greatest effect on how a model flies, and may

determine whether or not your first flight will be

successful. If you value this model and wish to enjoy it for

many flights, DO NOT OVERLOOK THIS IMPORTANT

PROCEDURE. A model that is not properly balanced will

be unstable and possibly unflyable.

The servo tray and receiver location are used to adjust the

center of gravity (C.G.). For now, temporarily position the

battery in the battery compartment and receiver in the radio

compartment, but do not secure them in place. When setting

the C.G. (below), adjust the position of the receiver and

servo tray as needed. Remember to also reposition the

Velcro

and rubber band mounting to properly hold them in

place. Note: Once the Mini Cub ARF is balanced, you may

secure the receiver and glue the servo tray in place.

1. Use a felt-tip pen or 1/8" [3mm] wide tape to accurately

mark the C.G. on the bottom of the wing on both sides close

to the fuselage. The recommended C.G. is located 2-1/16"

[52mm] back from the 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 1/4" [6.4mm] forward or 1/4" [6.4mm] back to

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 the wing attached to the fuselage and all parts of

the model installed (ready-to-fly), place the model on a

Great Planes C.G. Machine

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. Use Great Planes (GPMQ4485) "stick-on" lead if

necessary to add weight. A good place to add stick-on nose

weight is to the firewall (don't attach weight to the cowl–it is

not intended to support weight). Begin by placing

incrementally increasing amounts of weight on the bottom of

the fuse over the firewall until the model balances. Once you

have determined the amount of weight required, it can be

permanently attached. If required, tail weight may be added

under the stabilizer.

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, 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.

At this stage the model should be in ready-to-fly condition

with all of the systems in place including the motor, landing

gear, covering and paint, and the radio system.

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, or lift it at the balance point