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Micro Star 400 v2

2

Foreword

The MICRO STAR 400 v2 is a miniature electric-powered helicopter which boasts all the per-

formance and flight handling characteristics of much larger models. It is controlled using collec-

tive pitch and a Bell / Hiller main rotor mixer linkage, i.e. we have not adopted any compromises

which would have an adverse effect on flight control. The result is that the MICRO STAR 400 v2

can be flown without problem even in quite strong winds, in spite of its diminutive size.

The potential flight time per battery charge naturally varies according to the model’s set-up and

the pilot’s flying style; our experience shows that around 15 minutes duration is possible under

normal conditions if the recommended LiPo battery is used.

The control functions roll, pitch-axis and collective pitch are mixed mechanically, which means

that the model can be flown using a simple four-function radio control system; motor speed con-

trol and collective pitch are coupled together using a Y-lead. Nevertheless, a transmitter with

special helicopter options (mc-12 … mc-24) obviously offers certain advantages.

The model’s strong, lightweight chassis consists of nylon components, while the tail boom and

skids are made of eloxided aluminium; the boom braces are of carbon fibre.

The motor drives the main rotor by means of a single-stage gearbox with an integral auto-rota-

tion freewheel - by no means a standard feature in a model of this size.

The model is available in two versions which differ only in the tail rotor drive system: the tail

rotor is either driven directly by the motor via a ballraced carbon fibre shaft, or by a toothed belt.

Note: 

the version with belt-driven tail rotor is not suitable for installation in enclosed fuselages

such as the "A119 KOALA", Order No. 4461.

The MICRO STAR 400 v2 is supplied in a carry-case with handle; the case can be used subse-

quently to store and transport the model in ready-to-fly form (with the main rotor blades re-

moved).

Specification

Length excl. rotor approx.

580 mm

Height approx.

205 mm

Width excl. rotor approx.

90 mm

Main rotor Ø

630 mm

Tail rotor Ø

140 mm

All-up weight min. approx.

520 g

Main rotor reduction ratio

13.2:1

Tail rotor reduction ratio

4:1

Содержание Micro Star 400

Страница 1: ...model incl motor shaft driven tail rotor Warning The contents of this kit can be assembled to produce a working helicopter but the model is by no means a harmless plaything If assembled incorrectly o...

Страница 2: ...ead Nevertheless a transmitter with special helicopter options mc 12 mc 24 obviously offers certain advantages The model s strong lightweight chassis consists of nylon components while the tail boom a...

Страница 3: ...h are naturally subject to wear including gearbox components motor ball links etc and as a result it is absolutely essential to check and maintain the model regularly It is standard practice with full...

Страница 4: ...parts for the task We have made every effort to point out to you the dangers inherent in operating this model helicopter Since neither we the manufacturer nor the model shop that sold you the kit have...

Страница 5: ...nvested considerable effort in producing these instructions with the aim of ensuring that your model helicopter will fly reliably and safely Please take the trouble to follow the instructions step by...

Страница 6: ...ontrol system equipped with special helicopter options or a micro computer radio control system such as the mc 12 mc 15 mc 19 mc mx 22 or mc 24 Servos C 121 micro servo Order No 5106 Gyro system PIEZO...

Страница 7: ...smoothly and freely Shaft drive Loosen the screws which clamp the tail rotor housing to the tail boom and adjust the position of the tail rotor unit until there is barely detectable meshing clearance...

Страница 8: ...ystem components including a receiver battery then switching on the transmitter and receiver Check that all sticks and trims are at centre The basic collective pitch setting is established by adjustin...

Страница 9: ...Micro Star 400 v2 9 Adjust the position of the tail rotor servo until the tail rotor control lever is exactly at right angles to the tail boom when the servo is at neutral...

Страница 10: ...connected to the system by a plug and socket This connection should be positioned for easy access even when the cabin is in place because the plug and socket serve as the ON OFF switch for the receiv...

Страница 11: ...pitch is measured using the pitch gauge included in the kit The following table shows the recommended basic settings but the optimum values may well vary slightly according to your particular model a...

Страница 12: ...ious sections no changes to the mechanical arrangements will be necessary The following adjustments can all be carried out at the transmitter 1 Servo direction Set the sense direction of rotation of a...

Страница 13: ...otor control system and in order to achieve this effect the gyro elec tronics are connected between the tail rotor servo and the receiver The gyro systems recommended for the Micro Star 400 v2 either...

Страница 14: ...ee clearly which blade is higher and which is lower The best method is to mark the blades with coloured tape as follows There are two alternative methods figure A shows the use of different colours on...

Страница 15: ...lowing section therefore describes the procedure for assembling the model from its com ponent parts this may be important for subsequent maintenance and repair work 5 1 Assembling the model from compo...

Страница 16: ...hing works smoothly and freely if not loosen the screws M by half a turn Belt drive version only Press the two bearings into the toothed belt drive bracket 4441 329 then fit the front belt pulley 4441...

Страница 17: ...ttom then slide it into the washout unit and the slot in the main rotor shaft Slide the collective pitch pushrod 4441 334 into the main rotor shaft threaded end first and screw it into the slider P by...

Страница 18: ...top collet Fit the collective pitch pushrod into the clamp of the collective pitch lever and tighten the clamping screw Ensure that full symmetrical control travel is available on both sides of the ce...

Страница 19: ...hen screw the two housing shells together Install the bellcrank 4441 343 and the control bridge 4441 42 Each tail rotor blade 4441 41 is secured using an M2 screw with a ballrace fitted on it Fit the...

Страница 20: ...wing check that they swivel freely The tail boom is installed as shown in the illustration below Undo the four retaining screws from the chassis and remove the bracket and front belt pulley Loosen the...

Страница 21: ...10 It should be fixed in place either by lightly centre punching the outside of the tail boom on both sides of the bearing or gluing it in the boom Fit the rear flanged ballrace on the drive shaft 444...

Страница 22: ...s directly on the chas sis this places the drive shaft in the correct position relative to the motor pinion Note The tail boom is located lower in the chassis than with the toothed belt version with t...

Страница 23: ...replace the blades Internal blade damage may not be visible from the outside Never carry the model by the tail boom too firm a grip will easily deform the tail rotor pushrod 7 Some basic terms used i...

Страница 24: ...the rotor This can cause what is known as a turbulent ring stage when the airflow over the blade airfoil breaks away The heli copter is then uncontrollable and will usually crash A high speed descent...

Страница 25: ...der No 4495 4496 GRAUPNER GmbH Co KG D 73230 KIRCHHEIM TECK GERMANY Modifications errors and printing errors reserved ID 56503 12 05 Micro Star 400 v2 Summary of replacement parts Date of issue 12 200...

Страница 26: ...or and pinion 1 4441 22 Main rotor shaft aluminium 1 4441 23 Main gear 1 4441 24 Hub and freewheel 1 4441 325 Bellcrank set pitch axis 1 4441 326 Battery holder aluminium 1 4441 329 Tail rotor drive b...

Страница 27: ...landing gear 1 4441 410 Tail boom 10 mm CFRP 1 4441 420 Mechanics chassis CFRP aluminium 1 4441 122 Main rotor shaft steel 1 4441 125 Pitch axis bellcrank set aluminium 1 4441 130 Roll bellcrank set a...

Страница 28: ...Micro Star 400 v2 4 Notes...

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