RCGF Engines OPERATING INSTRUCTIONS
Contents
1. it is likely that the carburettor mixture and idle speed will need to be adjusted CARBURETOR ADJUSTMENT Every engine has been adjusted to average mixture settings which will most likely allow the engine to start and run in most locations However as altitudes and barometric pressures vary by location and even by day it is very likely that the carburettor mixture settings will need to be adjusted to obtain optimum performance NOTE Never make adjustments to the carburettor while it is running Always use a tachometer to aid in making adjustments to your carburettor 1 Choke Lever 2 Throttle Lever 3 Idle Speed Adjustment Screw 4 Low Speed Mixture Adjustment Screw 5 High Speed Mixture Adjustment Screw 6 Ignition Sensor The average mixture settings are 1 amp 1 2 turns out for the low speed circuit See No 4 and 1 amp 3 4 turns out for the high speed circuit See No 5 Carburettor mixture adjustment starts with the low speed circuit The low speed should be set such that the transition from idle to full throttle is smooth even if the throttle is snapped to full This will likely result in a slightly rich idle mixture but you re better off with that than a rough transition If the engine dies when the throttle is advanced the mixture is likely too lean If the engine stumbles when the throttle is advanced the mixture is likely too rich Since the low speed mixture has some effect on high speed mixture always adjust the high2. RCGE Engines OPERATING INSTRUCTIONS This engine is designed for use in radio controlled model airplanes With its high power output and lightweight it s ideal for your TOC airplane Read and follow all of the Operating Instructions before you use it WARNING The engine is not a toy Serious injury and even death may result from improper use You alone are responsible for its safe and proper operation RCGF is not responsible for any injury damage or other loss resulting from its use If you do not agree you must not use the engine SAFETY INSTRUCTIONS 1 If you are unfamiliar with this type of engine seek the help of an experienced user Never operate it alone or without proper knowledge and experience on hand Always have your club Safety Officer inspect your engine installation plane and radio set up before attempting to use them Verify proper ignition receiver and transmitter battery voltages and perform a range check before every flight NEVER attempt to start the engine or fly with radio glitches of any kind 2 Gasoline is highly flammable and hazardous always have a fully charged fire extinguisher at the ready when using it always use it with extreme caution and with approved containers and fueling equipment Never operate your engine indoors or in a closed area 3 Before every use check the engine assembly propeller and airframe carefully for any damage or loose screws nuts and bolts Normal gas engine vibration ha
3. airframe is dangerous and unsafe Do not use an engine stand to run the engine A stand may not allow engine vibration energy to be properly dissipated and may cause failure of the engine mounting parts propeller propeller mounting bolts or stand 9 Always fly in accordance with the safety rules regulations and recommendations of the AMA Read and understand all of the safety material on their website www modelaircraft org before using this engine ENGINE INSTALLATION If using the mounting brackets they should be installed with the closed end to the firewall and the open end to the engine If using the mounting stand offs the cut ends should be mounted to the engine If additional mounting height is needed it should be placed between the mounting hardware brackets stand offs and the firewall Make sure that all spacing is flat and of the same size and surface plane so as not to induce any twisting force into the mounting hardware or damage to the engine or mounting hardware failure may result Spacing should never be used between the mounting hardware and the engine In all cases the firewall airframe mounting surface must be absolutely flat or potentially damaging forces can be exerted to the engine or mounting hardware which can cause failure Check to see that the carburettor has adequate clearance at least lin to anything for proper breathing If it doesn t make appropriate adjustments Make sure that your airplanes fuel tank a
4. equately reinforced pinned soaked in thin CA etc IGNITION SYSTEM The RCGF ignition system is designed for input voltage ranging from 4 8 to 6 0 volts no more and no less A battery pack of 1200mah or greater may be sufficient for a day of flying for most users Check your battery voltage with a voltage meter before every flight and do not fly if the voltage is not between 5 2 and 6 0 volts the voltage at the start of a flight may not remain for the duration of the flight Disconnect the battery from the ignition system while charging the battery The ignition module should be connected to the battery through a heavy duty switch mounted where it can be reached easily when starting the engine NOTE A 6 volt or larger battery pack must be regulated to between 5 2 and 6 0 volts or it will supply too high a voltage to the ignition module The ignition module and its battery should both be soft mounted with 1 2in foam on all sides to avoid damage from vibration All parts in the ignition system should be mounted no less than 12in away from any part of the airplanes radio equipment to avoid possible interference The shielded plug wire is wrapped in a plastic spiral covering to help protect it from damage and wear Even so it must be inspected frequently as damage to the shielding may cause radio interference The spark plug that comes with engine should be gapped at 0 018in to 0 020in Torque should be 7 to 8 ft lbs Be very careful not t
5. n the ignition and briskly flip the prop through compression The engine should start in just a few flips If it acts like it wants to start but doesn t you may need to advance the throttle slightly NOTE Itis possible to flood the engine by over choking In this case the spark plug must be removed and dried of excess fuel Make sure to have the ignition off when removing the spark plug ENGINE MAINTENANCE Fuel tubing throughout the fuel system should be changed periodically and should never allow any air to enter the system If your gas line starts to get hard soft or changes colour there s a good chance it needs to be replaced Keep in mind that the tubing inside your tank deteriorates more quickly that anywhere else in the system The exterior of the engine should be kept clean and inspected regularly Tucked away inside the cowl it would be easy to miss loose nuts and bolts without frequent inspections Dirt inside the cowl area can easily find its way into the carburettor It should be kept clean and free of dirt build up The carburettor fuel screen should be cleaned periodically also Carefully remove the pump cover inlet side of the carburettor gasket and pump membrane The screen will be visible and can be cleaned after careful removal If ever the carburettor seems to need frequent mixture adjustment or acts like it s starving for fuel a dirty screen is a likely candidate for a cause The carburettor should be inspected clea
6. nd lines are made for gasoline use that the tank is adequately vented and that the feed line clunk can move freely in all directions and not get hung up anywhere We recommend using a filter between your gas supply and airplane fuel tank If you use a fuel filter between the airplane tank and the carburettor make sure it is of adequate size to supply an unobstructed flow of fuel to the carburettor or the engine may not run correctly Make sure that the cowl openings on your plane provide enough airflow for proper cooling Ideally all of the cooling fins of the cylinder should be exposed directly to unobstructed flow of cooling air and there should be 3 times as much air exit area as intake area Many planes have cowl openings that actually inhibit proper cooling of single cylinder engines Their openings were made to give a scale appearance of the full size planes they are patterned after Along with the openings described above blocking the scale openings either partially or wholly can significantly help promote cooling airflow over the cylinder fins Many types of fueling devices fuel dots filler valves etc are available for your use Our experience has shown that often the simplest is the best Regardless of which device you decide to use be very wary of air leaks as they can be detrimental to the proper operation of your engine NOTE Always use Loctite on engine mounting hardware and make sure your models firewall and engine box are ad
7. ned or reconditioned with every flying season or after being stored for a long period of time The spark plug should be inspected cleaned and gapped periodically and replaced if it is fouled or worn A new plug with every new season is a worthwhile maintenance step
8. o over tighten it or damage to the cylinder threads may result The plug cap comes with an internal grounding spring and a split retainer ring around its base they both must be used at all times The plug cap fits very tightly to the spark plug you should feel a release of pressure when the cap seats properly to the plug It will also be difficult to remove the plug cap from the plug be sure you pull straight out on the cap and not on the plug wire If the plug is not properly connected to the cap damage to the module may result ENGINE BREAK IN Break in running should be done with regular gas mixed with a high quality petroleum based 2 cycle oil at a ratio of 30 1 The engine should be run installed in the airframe with wings attached on the ground for 2hrs at 2500rpm Ground running should be done with a slightly smaller prop and with the cowl off to promote good cooling The engine should never be run in a test stand as they do not allow vibration energy to be properly dissipated When the 2hrs of ground running is complete the carburettor should be adjusted and the engine should be flown at light load and varying speed for enough time to have 3 gallons of gas mixed with high quality petroleum based 2 cycle oil run through it The prop you use should allow the engine to run at between 6700 and 7200rpm The oil should be switched to full synthetic 2 cycle mixed at a ratio of 45 1after that Note that when you switch to synthetic 2 cycle oil
9. s a tendency to loosen things up when you least expect it Never attempt to operate the engine or aircraft if you suspect there might be a problem 4 Always stand clear of and behind the propeller never allow anyone including yourself to be in front of or to the sides of the propeller when starting or running the engine Anyone near the engine should wear protective eyewear and clothing 5 Always use a correctly mounted correct length bolts no spacers behind it not touching the spinner cone etc and properly sized propeller Never use a propeller that has been damaged modified or repaired or that has not been properly balanced How to properly balance a prop is available online at www dodvideos com don3 wmv 6 Always use a heavy duty starter stick or heavy leather work glove to flip the prop Always have the airframe in a starting stand and have someone else hold the plane when starting or running the engine Never operate the engine where anything dirt gravel clothing any loose items might be drawn into the propeller Keep spectators at least 50ft away from your aircraft when operating the engine 7 Unless you are starting it never turn the engine over without first making sure the ignition is off Always use an ignition kill switch and have the throttle setup such that it can be used to stop the engine when necessary 8 Never mount the engine in anything other than an airframe for which it s designed for use in Overpowering an
10. speed after adjusting the low The high speed circuit is properly adjusted when the engine can reach maximum rpm while in the air which is usually slightly richer than when it s on the ground A general rule of thumb is to richen from the maximum on the ground rpm by about 200rpm If ever the engine slows or dies while at full throttle the high speed mixture is likely too lean and you should adjust it as soon as possible or damage can result NOTE Be careful not to run the mixture screws in too far as damage to the screw and or carburettor body may result Also don t be tempted to run an overly rich mixture Gas engine lubrication comes from the oil concentration in the gas not from a rich fuel air mixture If you want more lubrication you can vary the oil mix ratio A too rich mixture will only result in poor engine performance and a fouled plug and combustion chamber STARTING THE ENGINE COLD Step 1 Close the choke advance the throttle to very slightly above the idle position turn on the ignition and briskly flip the prop through compression until the engine fires and then dies If the gas line is dry this may take 20 or more flips Step 2 Open the choke and briskly flip the prop through compression The engine should start in just a few flips If it acts like it wants to start but doesn t you may need to advance the throttle slightly WARM Open the choke advance the throttle to very slightly above the idle position turn o
Download Pdf Manuals
Related Search