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SAFETY INSTRUCTIONS AND WARNINGS 
ABOUT YOUR O.S. ENGINE

INTRODUCTION,BASIC ENGINE PARTS

INSTALLATION

EXHAUST HEADER PIPE AND SILENCER,
THROTTLE LINKAGE, NEEDLE-VALVE EXTENSION

PROPELLERS, FUEL

GLOWPLUG 

FUEL AND PRESSURE LINES,
PROPELLER AND SPINNER ATTACHMENT

TYPE 40N CARBURETTOR, 
CONTROL LOCATIONS

STARTING

CONTENTS

RUNNING -IN

IDLING MIXTURE ADJUSTMENT

VALVE ADJUSTING

CARE AND MAINTENANCE

ENGINE EXPLODED VIEW

ENGINE PARTS LIST

CARBURETTOR  EXPLODED
VIEW & PARTS LIST

GENUINE PARTS & ACCESSORIES

THREE VIEW DRAWING

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Содержание FS-52S

Страница 1: ...ontained therein Also please study the entire contents of this instruction manual so as to familiarize yourself with the controls and other features of the engine Keep these instructions in a safe place so that you may readily refer to them whenever necessary It is suggested that any instructions supplied with the aircraft radio control equipment etc are accessible for checking at the same time ...

Страница 2: ...TLE LINKAGE NEEDLE VALVE EXTENSION PROPELLERS FUEL GLOWPLUG FUEL AND PRESSURE LINES PROPELLER AND SPINNER ATTACHMENT TYPE 40N CARBURETTOR CONTROL LOCATIONS STARTING CONTENTS RUNNING IN IDLING MIXTURE ADJUSTMENT VALVE ADJUSTING CARE AND MAINTENANCE ENGINE EXPLODED VIEW ENGINE PARTS LIST CARBURETTOR EXPLODED VIEW PARTS LIST GENUINE PARTS ACCESSORIES THREE VIEW DRAWING 16 17 17 20 20 21 1 ...

Страница 3: ...e would respectfully request that these instructions are also passed on to its new owner SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE The advice which follows is grouped under two headings according to the degree of damage or danger which might arise through misuse or neglect WARNINGS NOTES These cover events which might involve serious in extreme circumstances even fatal injury These co...

Страница 4: ...d or exhaust header pipe in particular may result in a serious burn Never touch or allow any object to come into contact with the rotating propeller and do not crouch over the engine when it is running A weakened or loose propeller may disintegrate or be thrown off and since propeller tip speeds with powerful engines may exceed 600 feet 180 metres per second it will be understood that such a failu...

Страница 5: ...hearing Such noise is also likely to cause annoyance to others over a wide area Fit a top quality propeller of the diameter and pitch specified for the engine and aircraft Locate the propeller on the shaft so that the curved face of the blades faces forward i e in the direction of flight Firmly tighten the propeller nut using the correct size wrench If you remove the glowplug from the engine and c...

Страница 6: ... wearing of safety glasses is also strongly recommended Discard any propeller which has become split cracked nicked or otherwise rendered unsafe Never attempt to repair such a propeller destroy it Do not modify a propeller in any way unless you are highly experienced in tuning propellers for specialized competition work such as pylon racing Take care that the glow plug clip or battery leads do not...

Страница 7: ... sand The propeller may throw such material in your face and eyes and cause injury For their safety keep all onlookers especially small children well back at least 20 feet or 6 meters when preparing your model for flight If you have to carry the model to the take off point with the engine running be especially cautious Keep the propeller pointed away from you and walk well clear of spectators Warn...

Страница 8: ... program of technological advancement examples of which would include the line of beautiful multi cylinder engines with many new engine designs continually under development One of the latter is this new FS 52S model Closely resembling the FS 48S externally the FS 52S combines increased performance and improved durability at virtually no increase in overall dimensions or weight Crankshaft Glow plu...

Страница 9: ...ront view CORRECT Side view Top surfaces are in the same plane Re align the surfaces as necessary INCORRECT Top surfaces are not in the same plane Opposite beam Top surfaces are not in the same plane Engine does not rest firmly Rigid hardwood e g maple At least 15mm 19 32 At least 15mm 19 32 Installation in the model A typical method of beam mounting is shown below left O S radial motor mount Avai...

Страница 10: ... open position Carefully align the appropriate holes in the throttle arm and servo horn so that they move symmetrically and smoothly through their full travel Fit these in the following sequence Screw the header pipe into the cylinder head until it bottoms then unscrew sufficiently to achieve the desired exhaust angle and tighten the locknut securely with a 14mm wrench Screw the silencer onto the ...

Страница 11: ...uels When changing to a fuel brand or formula that is different from the one to which you are accustomed it is a wise precaution to temporarily revert to in flight running in procedures until you are sure that the engine is running entirely satisfactorily The choice of propeller depends on the design and weight of the aircraft and on the type of flying in which you will be engaged Determine the be...

Страница 12: ...olt power source When the battery is disconnected the heat retained within the combustion chamber remains sufficient to keep the plug filament glowing thereby continuing to keep the engine running Ignition timing is automatic under reduced load allowing higher rpm the plug becomes hotter and appropriately fires the fuel air charge earlier conversely at reduced rpm the plug become cooler and igniti...

Страница 13: ...ene PROPELLER SPINNER ATTACHMENT Fit the prop to the engine shaft followed by the retaining washer and prop nut and tighten firmly with a 14mm wrench Add the special tapered and slotted locknut and secure with a 12mm wrench while holding the prop nut with the 14mm wrench There is a risk particularly with powerful four stroke engines of the propeller flying off if the prop nut loosens due to detona...

Страница 14: ...ence in which these controls are adjusted is explained in the succeeding sections under Starting Running in and Idling Adjustment Intake pipe retaining screws Rotor Guide screw Fuel Inlet Carburetor retaining screw Idle Mixture Control Valve Needle Valve CONTROL LOCATIONS The needle valve and throttle locations left and right are interchangeable by reversing the carburettor This can be done as fol...

Страница 15: ...ttle arm to within 15 20 of the fully closed position and slowly turn the prop backwards clockwise by hand approximately 1 5 turns until it is arrested by compression This is to enable the kinetic energy of the prop to subsequently assist the starter through the compression stroke to start the engine 1 2 3 4 5 6 Check these conditions and instead of pressing the starter button after applying the s...

Страница 16: ...e engine installed in the aircraft Start and adjust the engine as detailed in the starting instructions Now open the throttle fully and run the engine for no more than 5 seconds with the needle valve tuned to produce near maximum r p m then immediately slow the engine down again by opening the needle valve approximately 1 2 turn The rich mixture will cool the engine at the same time providing ampl...

Страница 17: ...can be safely operated at full power the carburettor can be adjusted for optimum throttle response following the instructions given in the next section Note Remember that when the engine is not yet fully run in the carburettor cannot be expected to give its best response in flight Abrupt operation of the throttle for example may cause the engine to stall 9 Therefore at this time the aircraft shoul...

Страница 18: ...may be inadvertently screwed in or out too far and thereby moved beyond its effective range Its basic position can be found by first rotating the Mixture Control Valve unit its slotted head is flush with the carburettor body The valve is then screwed in exactly 1 turn to re establish the original setting Realignment of Mixture Control Screw First rotate the Mixture Control Valve until its slotted ...

Страница 19: ...he prop driver drive hub of your engine is engraved with a letter T this mark should now be at the top 2 The standard valve clearance on both inlet and exhaust valves is between 0 04mm and 0 10mm 0 0015 0 004 inch measured between valve stem and rocker arm Use the 0 04mm and 0 10mm feeler gauges to check clearances See Fig 1 3 Note If the gap is found to be less than 0 04mm it is not necessary to ...

Страница 20: ...urn counter clockwise to open gap using appropriate tool i e Allen hex key Fig 3 Fig 2 Fig 3 Fig 4 Adjusting Screw Turn approx 1 2 turn Allen Key Insert 0 04mm feeler gauge between valve stem and rocker arm and gently turn adjusting screw clockwise until it stops Fig 4 0 04mm Feeler Gauge Turn with fingers until it stops Locknut Re tighten locknut while holding adjusting screw stationary Fig 5 4 H...

Страница 21: ...e unscrew the complete needle valve assembly from the carburettor and remove any foreign matter that has accumulated in this area See photo If these precautions are neglected restriction of fuel flow may cause the engine to cut out or the fuel air mixture to become too lean causing the engine to overheat The use of modern high performance alcohol based model engine fuels while promoting cooler run...

Страница 22: ...ure that the engine is reasonably clean externally then remove the glowplug and immerse the engine in a container of kerosene Rotate the crankshaft while the engine is immersed If foreign matter is visible in the kerosene rinse the engine again in clean kerosene shake off the excess and wipe it dry CARE MAINTENANCE continued The fuel pump assembly carburettor pressure regulator and silicone tubing...

Страница 23: ...crew M Oval Fillister Head Screw F Flat Head Screw N Round Head Screw S Set Screw i u y t r e w q 0 9 8 1 3 2 1 o o p a s d 5 3 5 2 5 1 1 2 1 1 3 2 3 1 5 7 6 4 6 3 6 2 6 1 7 1 0 2 0 1 f 1 2 2 5 4 6 d 1 C M3X12 C M3X18 C M2 6X12 C M2 6X7 N M2 6X19 C M3X8 C M2 6X7 22 ...

Страница 24: ...r Arm Assembly 1pair Rocker Arm 1pc Tappet Adjusting Screw Intake Valve Assembly 1pair Intake Valve 1pc Valve Spring 1pc Valve Spring Seat 1pc Valve Spring Retainer 2ps Exhaust Valve Assembly 1pair Exhaust Valve 1pc Valve Spring 1pc Valve Spring Seat 1pc Valve Spring Retainer 1pc Cylinder Head Cylinder Head Gasket Cylinder Head Assembly Intake Pipe Assembly Carburetor Complete Type 40N Carburetor ...

Страница 25: ...1 313 1 2 2081 408 2 1285 220 Specifications are subject to alteration for improvement without notice No Description Code No Throttle Lever Assembly Throttle Lever Retaining Screw Carburetor Rotor Nozzle Assembly Mixture Control Screw Assembly O Ring L 2pcs O Ring S 2pcs Rotor Guide Screw Carburetor Body Carburetor Rubber Gasket Fuel Inlet Needle valve Holder Assembly Ratchet Spring Needle valve A...

Страница 26: ...ch With Plug Grip 1 4 M5 Locknut Set Bubble Eliminating Tank Weight 71615009 O S Glow Plug TYPE F 71531000 71913000 45226000 Exhaust Header Pipe Assembly Flexible Exhaust Pipes 72108300 72108310 1010A 1010B 120 240 Type Length mm Code No 72108400 Exhaust Header Pipe 52S IN COWL Super Filter L 72403050 25 ...

Страница 27: ...EE VIEW DRAWING 8 56cc 0 523cu in 23 0mm 0 906in 20 6mm 0 811in 2 300 13 000r p m 0 9bhp 12 000r p m 434g 15 31oz Dimension mm Specification Displacement Bore Stroke Practical R P M Power output Weight 26 ...

Страница 28: ...ghts reserved Printed in Japan U N EQUALLED QUALITY PRECISION PERFORMAN C E ESTABLISHING THE STANDARDS OF EXCELLENC E 100101 TEL 06 6702 0225 FAX 06 6704 2722 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan URL http www os engines co jp ...

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