Fs-52S-Manual.Pdf
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It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-6 of this booklet and to strictly adhere to the advice contained 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. CONTENTS SAFETY INSTRUCTIONS AND WARNINGS 2~6 RUNNING -IN 15~16 ABOUT YOUR O.S. ENGINE IDLING MIXTURE ADJUSTMENT 16~17 INTRODUCTION,BASIC ENGINE PARTS 7 VALVE ADJUSTING 17~20 INSTALLATION 8 CARE AND MAINTENANCE 20~21 EXHAUST HEADER PIPE AND SILENCER, THROTTLE LINKAGE, NEEDLE-VALVE EXTENSION 9 ENGINE EXPLODED VIEW 22 PROPELLERS, FUEL 10 ENGINE PARTS LIST 23 GLOWPLUG 11 CARBURETTOR EXPLODED VIEW & PARTS LIST 24 FUEL AND PRESSURE LINES, PROPELLER AND SPINNER ATTACHMENT 12 GENUINE PARTS & ACCESSORIES 25 TYPE 40N CARBURETTOR, THREE VIEW DRAWING 26 CONTROL LOCATIONS 13 STARTING 14~15 1 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE Remember that your engine is not a "toy", but a highly efficient internal- combustion machine whose power is capable of harming you, or others, if it is misused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If at some future date, your O.S. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner. 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 These cover the many other might involve serious (in possibilities, generally less obvious extreme circumstances, even sources of danger, but which, under fatal) injury. certain circumstances, may also cause damage or injury. 2 WARNINGS • Never touch, or allow any object to come • Model engine fuel is also highly into contact with, the rotating flammable. Keep it away from open flame, propeller and do not crouch excessive heat, sources of sparks, or over the engine when it is anything else which might running. ignite it. Do not smoke or allow anyone else to smoke, near to it. • A weakened or loose propeller may disintegrate or be thrown off and, since • Never operate your engine in an en- propeller tip speeds with powerful closed space. Model engines, like auto- engines may exceed 600 feet(180 metres) mobile engines, exhaust deadly carbon- per second, it will be understood that monoxide. Run your engine only in an such a failure could result in serious open area. injury, (see 'NOTES' section relating to • Model engines generate considerable propeller safety). heat. Do not touch any part of your • Model engine fuel is poisonous. Do not engine until it has cooled. Contact with allow it to come into contact with the eyes the muffler (silencer), or mouth. Always store it in a cylinder head or exhaust clearly marked container and header pipe, in particular, out of the reach of children. may result in a serious burn. 3 NOTES • This engine was designed for model • If you remove the glowplug from the engine aircraft. Do not attempt to use it for any and check its condition by connecting the other purpose. battery leads to it, do not hold the plug with bare fingers.Use an appropriate tool or a Mount the engine in your model securely, • folded piece of cloth. following the manufacturers' recommenda- tions, using appropriate screws and lock- • Fit a top-quality propeller of the diameter nuts. and pitch specified for the engine and • Be sure to use the silencer (muffler) aircraft. Locate the propeller on the shaft so supplied with the engine. Frequent that the curved face of the blades faces exposure to an open exhaust may forward-i.e. in the direction of flight. Firmly eventually impair your hearing. tighten the propeller nut, using the correct Such noise is also likely to cause size wrench. annoyance to others over a wide area. 4 NOTES • Always check the tightness of the propeller • Discard any propeller which has become nut and retighten it, if necessary, before split, cracked, nicked or otherwise rendered restarting the engine, particularly in the unsafe. Never attempt to repair such a case of four-stroke-cycle engines. If a propeller: destroy it. Do not modify a propeller safety locknut assembly is provided with in any way, unless you are highly experienced your engine, always use it. This will prevent in tuning propellers for specialized the propeller from flying off in the event of a competition work such as pylon-racing. "backfire", even if it loosens. • Take care that the glow plug clip or battery • If you fit a spinner, make sure that it is a leads do not come into contact with the precision made product and that the slots propeller. Also check the linkage to the for the propeller blades do not cut into the throttle arm. A disconnected linkage could blade roots and weaken them. also foul the propeller. • After starting the engine, carry out any • Preferably, use an electric starter. The needle-valve readjustments from a safe wearing of safety glasses is also strongly position behind the rotating propeller. Stop recommended. the engine before attempting to make other adjustments to the carburettor. 5 NOTES • Adjust the throttle linkage so that the engine • For their safety, keep all onlookers stops when the throttle stick and trim lever (especially small children) well back (at on the transmitter are fully retarded. least 20 feet or 6 meters) when preparing Alternatively, the engine may be stopped by your model for flight. If you have to carry cutting off the fuel supply. Never try to stop the model to the take-off point with the the engine physically. engine running, be especially cautious. • Take care that loose clothing (ties, shirt Keep the propeller pointed away from you sleeves, scarves, etc.)do not come into and walk well clear of spectators. contact with the propeller.Do not carry loose • Warning! Immediately after a glowplug- objects (such as pencils, screwdrivers, etc.) ignition engine has been run and is still in a shirt pocket from where they could fall warm, conditions sometimes exist whereby through the propeller arc. it is just possible for the engine to abruptly • Do not start your engine in an area restart if the propeller is casually flipped containing loose gravel or sand. over compression WITHOUT the glowplug The propeller may throw such material in battery being reconnected. Remember this your face and eyes and cause injury. if you wish to avoid the risk of a painfully rapped knuckle! 6 INTRODUCTION BASIC ENGINE PARTS Having pioneered the development of four- Rocker Cover stroke cycle model aircraft engines in 1976, O.S. has maintained a continuing program of technological advancement, examples of which, would include the line of beautiful Push Rod Cover multi-cylinder engines, with many new Intake Pipe engine designs continually under Crankshaft 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. Drive Hub INSTALLING THE GLOWPLUG Crankcase Fit washer to glowplug and insert carefully into cylinder- head, making sure that it is Beam Mount not cross-threaded Silencer before tightening firmly. Glow plug Carburettor Washer 7 INSTALLATION How to fasten the mounting screws. Installation in the model Tighten second nut firmly A typical method of beam O.S. radial motor mount down onto first nut. mounting is shown below,left. (Available as an optional extra part. 3.5mm steel nuts See parts list) Tighten this nut first. Spring washer or lock washer 15mm min. Hardwood such as cherry or maple. 15mm min. Steel washer Rigid hardwood (e.g. maple) 3.5mm steel screw At least At least 15mm(19/32") 15mm(19/32") Hardwood mounting beams Make sure that the mounting beams are parallel and that their top surfaces are in the same plane. 3.5mm steel Allen screw CORRECT INCORRECT Spring washer Top surfaces are not Front view Side view in the same plane. Opposite beam Top surfaces O.S. radial motor mount Re-align the surfaces are not in the (cast aluminum) as necessary same plane. Engine does Top surfaces are in the same plane. not rest firmly. 8 EXHAUST HEADER PIPE & SILENCER THROTTLE LINKAGE Fit these in the following sequence. Before connecting the throttle to the servo, make sure Screw the header pipe into the cylinder head until it that the throttle arm and linkage safely clear any bottoms, then unscrew sufficiently to achieve the adjacent part of the airframe structure, etc., as the desired exhaust angle and tighten the locknut securely throttle is opened and closed. with a 14mm wrench. Screw the silencer onto the outer Connect the linkage so that the throttle is fully closed end of the header pipe and tighten the second locknut. when the transmitter throttle stick and its trim lever The application of a heatproof silicone sealant to the are at their lowest settings and fully open when the threads of the exhaust system is recommended to throttle stick is in its fully-open position.. reduce the risk of joints loosening and the leakage of Carefully align the appropriate holes in the throttle exhaust gases and oil residue.