GREAT PLANES COMBAT MUSTANG Combat P-51 ARF Руководство по эксплуатации - Страница 15

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GREAT PLANES COMBAT MUSTANG Combat P-51 ARF Руководство по эксплуатации

Note: The throws are measured at the widest part of the

elevators and ailerons.

These are the recommended control surface throws:

High Rate

ELEVATOR:

3/8" [9.5mm] up

3/8" [9.5mm] down

AILERONS:

5/16" [8mm] up

5/16" [8mm] down

IMPORTANT: The Combat P-51 ARF has been

extensively flown and tested to arrive at the throws at

which it flies best. Flying your model at these throws will

provide you with the greatest chance for successful first

flights. If, after you have become accustomed to the way

the Combat P-51 ARF flies, you would like to change the

throws to suit your taste, that is fine. However, too much

control throw could make the model difficult to control, so

remember, "more is not always better."

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.

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

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

gear, covering and paint, and the radio system.

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

mark the C.G. on the top of the wing on both sides of the

fuselage. The C.G. is located 2-1/4" [57mm] back from the

leading edge of the wing at the fuselage.

Low Rate

1/4" [6mm] up

1/4" [6mm] down

1/4" [6mm] up

1/4" [6mm] down

This is where your model should balance for the first

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

C.G. up to 1/8" [3mm] forward or 1/8" [3mm] 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, all parts of the

model installed (ready-to-fly) and an empty fuel tank, place

the model upside-down on a Great Planes CG Machine, or

lift it upside-down 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, nose weight may

be easily added by using a "spinner weight" (GPMQ4645 for

the 1 oz. weight, or GPMQ4646 for the 2 oz. weight). If

spinner weight is not practical or is not enough, use Great

Planes (GPMQ4485) "stick-on" lead. 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 by cutting open the bottom of the fuse and gluing

it permanently inside.

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

weight to permanently hold it in place. Over time, fuel and

exhaust residue may soften the adhesive and cause the

weight to fall off. 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.