User manual OS ENGINES MAX-46AX

[. . . ] 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 ABOUT YOUR O. S. [. . . ] Always store it in a clearly marked container and out of the reach of children. Keep it away from open flame, excessive heat, sources of sparks, or anything else which might ignite it. Do not smoke, or allow anyone else to smoke, near to it. PROPELLERS Suggested propeller sizes are listed on page 15. The suitability of the prop depends on the size and weight of the model and type of flying. Some nylon propellers are not strong enough to withstand the high power output of these engines and a thrown blade can be very dangerous. 14 Sport 10. 5x6, 11x6-8, 12x6-7 Reminder!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. MIXTURE CONTROLS Two mixture controls are provided on this Carburetor. The Needle Valve (at rear of engine) When set to produce maximum power at full throttle, this establishes the basic fuel/air mixture strength. The correct mixture is then maintained by the carburetor's built-in automatic mixture control system to cover the engine's requirements at reduced throttle settings. The Mixture Control Valve (carburetor) This meters fuel flow at part-throttle and idling speeds to ensure reliable operation as the throttle is opened and closed. The Mixture Control Valve is factory set for the approximate best result. First run the engine as received and readjust the Mixture Control Screw only if necessary. 15 BEFORE STARTING Tools, accessories, etc. 1 Fuel Model glowplug engine fuel of good quality, preferably containing a small percentage of nitromethane. 4 Glowplug battery The power source for heating the glowplug may be either a large heavy-duty 1. 5volt dry cell, or preferably, a 2-volt rechargeable lead-acid cell (accumulator). If a 2-volt cell is employed, use a resistance wire, as shown, to reduce applied voltage, otherwise element will overheat and burn out. 1. 5 volt heavy-duty or 2 volt rechargeable dry battery lead-acid cell (at least 5Ah) Warning (Very hot) Never touch the nichrome wire while the battery is connected. Resistance coil (nichrome wire) to ge ss. cr tness in h brig Battery leads Adjust applied voltage by changing the position of clip on resistance coil until glowplug element is glowing bright red. 5 Battery leads Battery leads These are used to conduct current from the battery to the glowplug. Basically, two leads, with clips, are required, but, for greater convenience, twin leads with special glowplug connectors, as shown on the right, are commercially available. 6 Fuel tank For installation in the model a 300cc (10. 6oz. ) tank is suggested. 7 Fuel bottle or pump For filling the fuel tank, a simple, polyethylene "squeeze" bottle, with a suitable spout, is all that is required. Alternatively, one of the purpose-made manual or electric fuel pumps may be used to transfer fuel directly from your fuel container to the fuel tank. 8 Electric starter and starter battery An electric starter is recommended for starting. 12V Battery 10 Silicone tubing This is required for the connection between the fuel tank and engine. long plug wrench is available as an optional accessory. For tightening glowplug Fuel bulb Fuel pumps Electric Manual Starter STARTING 1. solid aluminium alloy spinner-nut for centering the rubber drive insert of the starter. Alternatively, a good quality spinner, enclosing the propeller boss, may be used, but make sure that it is of precision-made and sturdy construction so that the spinner shell cannot loosen when the starter is used. Close the throttle. 9 Fuel can filter Fit a filter to the outlet tube of your refuelling container to prevent entry of foreign matter into the fuel tank. Fuel Can Filter 17 3. [. . . ] Set the throttle one-quarter open from the fully closed position, energize the glowplug and apply the electric starter. When the engine starts, reopen the throttle and re-adjust the needle-valve to the optimum setting. Note: When re-starting the engine on the same day, provided that atmospheric conditions have not changed significantly, it may be practicable to restart the engine on its optimum(running) setting. SUBSEQUENT READJUSTMENT Once the engine has been run-in and the controls properly set up, it should be unnecessary to alter the mixture settings; except to make minor adjustments to the Needle-Valve occasionally, to take account of variations in climatic conditions. The use of a different fuel, however, particularly one containing more, or less, nitromethane and/or a different type or proportion of lubricating oil, is likely to call for some readjustment of the Needle-Valve. [. . . ]