29. Balancing

If your Mini Mag is to fly safely and stably it must balance at the correct point - just like every other aircraft. Assemble your model completely, ready to fly, and install the flight battery.

The Centre of Gravity should be at a point 67 mm aft of the leading edge of the wing, measured where the wing meets the fuselage. You will find markings moulded into the underside of the wing at this point.

Support the model on your fingertips at the marked point, and it should balance level. If necessary, adjust the position of the flight battery until this is the case. Once the correct position is found, mark it inside the battery box to ensure that the battery is always replaced in exactly the same location. Fig. 43

30. Preparing for the first flight

Wait for a day with as little breeze as possible for the first flight. The evening hours often provide the best conditions.

Be sure to carry out a range check before the first flight!

The transmitter battery and flight pack must be fully charged according to the instructions. Ensure that the channel you are using is not already in use before you switch on the transmitter.

Collapse the transmitter aerial, and ask a friend to walk away from you holding the transmitter.

As he walks away your friend should constantly operate one control function while you watch the model’s servos. The servo not being operated should stay motionless up to a range of around 60 m, and the other servo should follow the transmitter stick movements smoothly and immediately. This test only provides meaningful results if the radio band is “clean” (not suffering interference), and if no other radio control transmitters are switched on, even if they are on different channels. If successful, repeat the check with the motor running. The effective range should not be significantly reduced when the motor is running.

If you are not sure about anything, do not fly the model! If you cannot eliminate the problem send the whole radio control system (including battery, switch harness, servos) to the manufacturer’s service department for checking.

The first flight ....

Do not test-glide this model!

The model is designed for hand-launching - always exactly into wind.

We recommend that you ask an experienced modeller to help you during the first flight.

Allow the model to climb to a safe altitude, then adjust the trims on the transmitter so that the model flies straight ahead without any help from you.

At a safe height switch off the motor and make yourself familiar with the model’s control response on the glide. Carry out a dummy landing approach at a good height, so that you will feel confident about the real landing when the flight pack is flat.

Don’t attempt tightly banked turns close to the ground at first, and especially not on the landing approach.

It is always better to land safely some distance away, and have to walk to collect the model, than to risk damaging it by dragging it close to your feet.

31. Safety

Safety is the First Commandment when flying any model aircraft. Third party insurance should be considered a basic essential. If you join a model club suitable cover will usually be available through the organisation. It is your personal responsibility to ensure that your insurance is adequate (i.e. that its cover includes powered model aircraft).

Make it your job to keep your models and your radio control system in perfect order at all times. Check the correct charging procedure for the rechargeable batteries used in your RC set. Make use of all sensible safety systems and precautions which are advised for your system.An excellent source of practical accessories is the MULTIPLEX main catalogue, as our products are designed and manufactured exclusively by practising modellers for other practising modellers.

Always fly with a responsible attitude. You may think that flying low over other people’s heads is proof of your piloting skill; others know better. The real expert does not need to prove himself in such childish ways. It is in all our interests that you let other pilots know that this is also what you think. Always fly in such a way that you do not endanger yourself or others. Bear in mind that even the best RC system in the world is subject to outside interference. No matter how many years of accident-free flying you have under your belt, you have no idea what will happen in the next minute.

We - the MULTIPLEX team - hope you have many hours of pleasure building and flying your new model.

Klaus Michler

Product development

MULTIPLEX Modellsport GmbH & Co. KG

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Multiplex Technology 21 4211 Balancing, Preparing for the first flight, First flight Do not test-glide this model, Safety
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21 4211 specifications

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