MULTIPLEX Heron Instructions d'exploitation télécharger pdf (Page 21)

and / or glue the appropriate number of ballast balls 40 in

the n. We cannot state exactly how much ballast is required

due to manufacturing tolerances in the foam density, and the

different airborne equipment for the glider and electric glider

versions. Mark the location of the airborne components in

the fuselage once you have found the correct location, so

that you can be sure always to replace the battery in the

same position. Apply the n sticker over the trim weight

openings.

Fig. 41

39. Setting the control surface travels (guideline only!)

The control surface travels must be correct, otherwise the

model will not respond harmoniously to control commands.

All travels are measured at the widest point of the control

surface concerned.

Elevator

up (stick back) approx. + 10 mm

down (stick forward) approx. - 10 mm

Powermix approx. - 0,5 mm

Down-elevator mix with Flap

speed / thermic approx. -1,5 /-1,5 mm

Rudder

left and right approx. 20 mm

each side of centre

Ailerons

up approx. + 16 mm

down approx. - 8 mm

Flap approx. +2 / -2 mm

Flaps (camber-changing aps)

aileron approx. + 10 mm

up (Speed) approx. + 3 mm

down (Thermic) approx. - 3,5 mm

Spoilers (buttery)

both ailerons up approx. + 22 mm

both aps down approx. - 26 mm

Down-elevator mix with spoiler approx. - 5 mm

Both ailerons can be set to move up and both aps move

down simultaneously in order to provide a “spoiler” func-

tion, i.e. to shorten the landing approach; this is known as

the “buttery” or “crow” braking system. At the same time

a suita-ble amount of down-elevator trim must be mixed

in to keep the model in a stable attitude. This can only be

done if your radio control system features suitable mixers.

If you are not sure of this, please refer to the instruc-

tions supplied with your radio control system.

The Buttery adjustment allows if needed steep and targe-

ted landing approaches in difcult terrain.

Note: when you apply a right-aileron command, the right-

hand aileron - as seen from the tail, looking forward - must

deect up.

Simultaneously, the right ap halfway with running upwards.

When an aileron down the ap does not work with down!

If you cannot set the stated control surface travels using your

radio control system’s electronic adjustment facilities, you

may need to connect the pushrod to a different linkage hole.

Ensure that all the radio control system components are

properly installed and connected. Check the control surface

centres and travels, the direction of rotation of the servos,

and the freedom of movement of the control system com-

ponents. Ensure that the power leads cannot come into

contact with the rotating motor barrel (secure them with

hot-melt adhesive). Check once more that the motor shaft

rotates in the correct direction - please take care!

40. Preparations for the rst ight

For the rst ight wait for a day with as little breeze as

possible; the evening hours often offer calmer conditions.

It is essential to carry out a range-check before the rst

ight! Please follow the instructions laid down by your RC

system manufacturer.

The transmitter battery and ight pack must be fully charged

in accordance with the manufacturer’s recommendations.

Before switching the system on, ensure that your chosen

channel is free; this does not apply if you are using a 2.4

GHz system.

If you are unsure about any point, do not y the model! If

you cannot identify and cure the problem, send the whole

RC system (including battery, switch harness and servos)

to your system manufacturer for checking.

41. Maiden ight …

The aircraft is designed to be hand-launched (always into

wind).

If you are a beginner to model ying, we strongly recom-

mend that you ask an experienced modeller to help you

for the rst few ights. Once the model has reached a

safe height, adjust the control surfaces using the trims on

the transmitter, so that the model ies straight and level

“hands-off”.

Powered version: with the aircraft ying at an adequate

altitude, check how it responds when the motor is switched

off, so that you are familiar with its behaviour on the glide.

Carry out repeated simulated landing approaches at a safe

height, as this will prepare you for the real landing when the

battery is discharged.

Avoid ying tight turns at rst, especially close to the ground,

and in particular during the landing approach. It is always

better to land safely some distance away than to risk a crash

by forcing the model back to your feet.

42. Thermal ying

Making the best use of at eld thermals is not particularly

easy, and calls for considerable skill and experience. Areas

of rising air are harder to detect and recognise at a at eld,

because they tend to occur at higher altitude than at the

hillside, where it is often possible to nd lift while the model

is cruising along the edge of the slope, and then circle away

in it. A thermal at a at eld which occurs directly overhead

is very hard to recognise, and to exploit it to the full requires

a highly skilled pilot. For this reason it is always best to go

thermal seeking off to one side of where you are standing.

You will recognise thermal contact by the glider’s behaviour.

Good thermals are obvious because the model will climb

strongly, but weak thermals take a practised eye to detect,

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MULTIPLEX Heron Instructions d'exploitation Page 21

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