GREAT PLANES L-39 Gebrauchsanweisung - Seite 12

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

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

lift it upside down at the balance point you marked.

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

battery pack and/or receiver must be shifted to balance. If

the nose drops, the model is "nose heavy" and the battery

pack and/or receiver must be shifted to balance. This model

is very weight sensitive. We do not recommend adding any

additional weight to achieve the suggested balance point

unless absolutely necessary. Instead, shift the battery pack

and receiver forward or aft to alter the C.G.

PREFLIGHT

Identify Your Model

No matter if you ﬂ y at an AMA sanctioned R/C club site or

if you ﬂ y 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

ﬂ ying sites and AMA sanctioned ﬂ ying events. Fill out the

identiﬁ cation tag on the back cover of this manual 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 and motor batteries the night

before you go ﬂ ying, and at other times as recommended by

the manufacturer.

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 ﬂ ying

with batteries that are only partially charged.

Range Check

Ground check the operational range of your radio before the

ﬁ rst ﬂ ight 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 ﬂ y! Find and correct the

problem ﬁ rst. 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.

AMA SAFETY CODE (

Read and abide by the following excerpts from the Academy

of Model Aeronautics Safety Code. For the complete Safety

Code refer to Model Aviation magazine, the AMA web site or

the Code that came with your AMA license.

1) I will not ﬂ y my model aircraft in sanctioned events, air

shows, or model ﬂ ying demonstrations until it has been

proven to be airworthy by having been previously,

successfully ﬂ ight tested.

2) I will not ﬂ y my model aircraft higher than approximately

400 feet within 3 miles of an airport without notifying the

airport operator. I will give right-of-way and avoid ﬂ ying

in the proximity of full-scale aircraft. Where necessary,

an observer shall be utilized to supervise ﬂ ying to avoid

having models ﬂ y in the proximity of full-scale aircraft.

3) Where established, I will abide by the safety rules for the

ﬂ ying site I use, and I will not willfully and deliberately ﬂ y my

models in a careless, reckless and/or dangerous manner.

5) I will not ﬂ y my model unless it is identiﬁ ed with my name

and address or AMA number, on or in the model. Note:

This does not apply to models while being ﬂ own indoors.

7) I will not operate models with pyrotechnics (any device

that explodes, burns, or propels a projectile of any kind).

Radio Control

1) I will have completed a successful radio equipment ground

check before the ﬁ rst ﬂ ight of a new or repaired model.

2) I will not ﬂ y my model aircraft in the presence of spectators

until I become a qualiﬁ ed ﬂ ier, unless assisted by an

experienced helper.

EXCERPTS

General

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