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Starlet 50

27

Roughen the surface of the flybar at the point where the control bridge 4618.37 is to be
clamped. Screw the control bridge to the flybar, applying thread-lock fluid between the bar and
the control frame to prevent any danger of the flybar rotating in the control bridge during violent
aerobatic manoeuvres.
Slip the ball-collets 4607.36 on both ends of the flybar, and position them resting against the
control bridge. Before fitting the M3 x 3 grubscrews apply a drop of thread-lock fluid to the
threaded holes in the ball-collets. Press the double ball-links 4607.35 into place as shown.
Apply thread-lock fluid to the sockets in the flybar paddles 4682.34, and screw them onto the
ends of the flybar to a depth of exactly 15 mm. Set them exactly parallel to each other and to the
control bridge.

Press an M3 nut into the recess in one side of the rotor head hub, and press the two guide pins
4450.44 for the collective pitch compensator into the holes, applying thread-lock fluid to the
sockets first.

Make up two straight and two angled pushrods as shown in the drawing.

Содержание Starlet 50

Страница 1: ...embled to produce a working model which is by no means a harmless plaything It is a complex flying machine and if built incorrectly or handled incompetently or carelessly it can cause serious injury t...

Страница 2: ...ment as it can be upgraded directly to UNI EXPERT mechanics or UNI mechanics 2000 status the mechanics can even be installed directly in many fuselage kits with the existing motor i e without requirin...

Страница 3: ...which 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...

Страница 4: ...ty of these other 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 sol...

Страница 5: ...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 step ex...

Страница 6: ...ystem equipped with special helicopter functions or a micro computer radio control system such as the mc 12 mc 14 mc 15 mc 19 mc 22 mc 24 As a minimum your RC system must include a 3 point swashplate...

Страница 7: ...the job A loosely fitted bearing can also cause another problem the shaft starts to move axially inside the inner bearing ring and the shaft wears in that area and its diameter is reduced If there ar...

Страница 8: ...e axial stress If this happens tap lightly on the end of the shaft in the axial direction using a screwdriver handle or similar or tap harder on the bearing support until the bearings ease into the co...

Страница 9: ...ve assembled to this stage and place it between the mechanics side frames 4450 9 and 4450 10 so that you can check that the top bearing rests against the freewheel sleeve above the shim washer when th...

Страница 10: ...the circlip 4607 156 along the main rotor shaft 4450 43 from the top and allow it to engage in the channel Please note the following points here The circlip must not be over stressed i e take care not...

Страница 11: ...hanics side frames using further M3 x 16 socket head cap screws and check that there is absolutely no axial play in the main rotor shaft between the bearings if there is fit further shim washers under...

Страница 12: ...ing the motor bag UM 2 The mechanical assembly of this helicopter is designed for a motor with a long ground 8 mm crankshaft as specified for all Graupner Heim model helicopters However other types of...

Страница 13: ...mly using a suitable tool while you do this When attaching the clutch bell to the crankshaft it is essential to ensure that the shaft is not pushed out of position in its bearings Once you have fitted...

Страница 14: ...the mechanics using the two special M3 x 12 screws working from the inside of the assembly Attach the motor to the motor mounts using four M3 x 16 socket head cap screws fitting a washer 560 7 on each...

Страница 15: ...ettor opening in the fan housing depending on the type of carburettor you are using the same applies to the hole for the cylinder head Fit the fan housing over the motor and fix it to the mechanics us...

Страница 16: ...UM 4 Assemble the sub structure as shown in the illustration using the side frames 4448 34 the bulkhead 4450 18 the spacers 4450 17 the RC box 4445 101 and the skid brackets 1291 21A using the approp...

Страница 17: ...roject through the bottom motor mount screw holes Fit M3 self locking nuts on the projecting shanks to secure the motor mounts The next step is to set the proper meshing clearance in the first gearbox...

Страница 18: ...onnection to the motor using twin core cable A crocodile clip is used for the centre contact so that the glowplug can be replaced quickly and easily solder the croc clip to the wire running from the c...

Страница 19: ...assembled This action compresses the rubber bung and causes it to swell laterally sealing the throat of the tank effectively Carefully remove any rough edges from the fueltank support surfaces at the...

Страница 20: ...rs must be fitted Make up three pushrods as shown in the drawing using the threaded rods 4618 51 2 mm 75 mm long and six ball links 4618 55 The stated dimension refers to the actual clearance between...

Страница 21: ...em instructions then switch on the RC system and activate the swashplate mixer at the transmitter setting symmetrical three point linkage two roll servos 1 pitch axis servo at the rear Set the collect...

Страница 22: ...at the transmitter If you decide to install a four point linkage it is very important to adjust the pushrods really accurately otherwise the opposed servos may be under constant strain This is the pr...

Страница 23: ...bove it and stow these components in the RC box where they are secured with rubber bands Note that the receiver sockets should be on the right hand side so that the servo cables can be plugged in dire...

Страница 24: ...ot remove any rough edges from the mixer lever bores and lubricate with silicone oil The mixer levers are screwed in place using the M3 nuts Press the radial bearings 4607 31 and the shell of the comb...

Страница 25: ...nward and tighten the M5 x 12 socket head cap screw Turn this assembly over so that the blade holder you have just installed is at the bottom and fit the second blade holder on the blade pivot shaft u...

Страница 26: ...re that the flybar can be slid through later without jamming or binding Fit an M2 x 4 screw on the outside on each side to fix the two ballraces to the hub Check that the rocker rotates freely Press t...

Страница 27: ...tting the M3 x 3 grubscrews apply a drop of thread lock fluid to the threaded holes in the ball collets Press the double ball links 4607 35 into place as shown Apply thread lock fluid to the sockets i...

Страница 28: ...ry and slide the swashplate up as far as it will go The swashplate should now rest against the collective pitch compensator when the compensator itself is resting against the bottom face of the main r...

Страница 29: ...shaft 4448 40 as shown in the illustration Apply bearing retainer fluid Order No 951 before fitting the bearings The bearings must not be under stress if necessary tap on them using a screwdriver hand...

Страница 30: ...ear on the input shaft If this is the case you will find that the tips of the teeth of the bevel gear 4618 41 are already fouling the spacer sleeve 4450 28A and yet there is backlash in the meshing cl...

Страница 31: ...rol sleeve and press it against the inner ring of the other ballrace Press the shakeproof washer 1291 26 on the control sleeve and against the control bridge Check that the control ring can rotate eas...

Страница 32: ...s together The pin is secured in turn by fitting the M3 x 3 grubscrew Note the correct orientation of the hub as shown in the drawing Fix the tail rotor blades in the blade holders using the two M3 x...

Страница 33: ...crew fully to cut the threads Loosen the screw again to the point where the tail boom can be pushed into place later 7 3 Preparing the tail boom bag SR 2 Note that the tail boom is curved at the front...

Страница 34: ...f the tail boom brace flange as shown in the drawing The parts for this are not included in the kit and must be purchased separately 7 5 Determining the correct length of the tail rotor drive shaft Re...

Страница 35: ...y Rotate the tail boom so that the curve of the boom runs upwards and is exactly in the vertical plane and rotate the tail rotor flange so that the tail rotor shaft when viewed from the tail stands at...

Страница 36: ...ipe through the rear bulkhead 4450 18 working from the rear and connect it to the exhaust manifold with Teflon hose and spring clips there should be a gap of about 5 mm between the manifold and the in...

Страница 37: ...ank should be exactly at right angles to the tail boom Alternatively you can simply form a Z bend in the front end of the wire pushrod using Z bend pliers Order No 5732 The advantage of this method is...

Страница 38: ...wide between cabin and exhaust system The bulkhead can now be glued to the cabin in this position using Stabilit express Allow the glue to cure fully before removing the cabin from the mechanics It s...

Страница 39: ...the moments of both rotor blades should be the same when they are mounted on the rotor head This means that blades of different weights can certainly be used provided that the CG of the blades is als...

Страница 40: ...pitch gauge optional accessory not included in the kit The following table shows the recommended basic settings but the optimum values may well vary from model to model according to the rotor blades...

Страница 41: ...shplate servos should produce a range of blade pitch angles covering 5 to 13 also with symmetrical travels you may find it necessary to remove the servo output arm move it round by one spline and fit...

Страница 42: ...nfluence the settings The aim of the gyro adjustment process is to achieve as high a level of gyro stabilisation as possible without the gyro causing the tail boom to oscillate Notes regarding the use...

Страница 43: ...er large or small place considerable demands on maintenance Whenever you notice vibration in your model take immediate steps to reduce or eliminate it Rotating parts important screwed joints control l...

Страница 44: ...ble to see 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 co...

Страница 45: ...at starting the motor open the needle valve 1 to 2 full turns from closed connect the glowplug to the plug battery and start the motor by engaging the adaptor on the electric starter in the teeth of t...

Страница 46: ...icular care that no item of clothing can get caught on the throttle stick Do not let the model fly out of safe visual range There should always be a safe reserve of fuel in the tank Never keep flying...

Страница 47: ...an unpredictable direction Climb Any excess power above that required for hovering can be exploited to make the helicopter climb Note that a vertical climb requires more energy than an angled climb w...

Страница 48: ...an be converted into upthrust when the helicopter is close to the ground by the pilot applying positive collective pitch Of course this can only be done once and it has to be done at the correct momen...

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