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3W 42i Engine Manual

more infos: www.3w-modellmotoren.de

Pilots check list

We strongly recommend checking the following agenda for your own safety before starting!

•

Check the propeller bolts for tightness

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Check that the spinner is firmly attached

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Check the propeller for possible damage

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Check to be sure you have the throttle position at idle

•

Check all batteries

•

Check servo functions

•

Check to see that the ignition switch is OFF

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Check pressure (6-8 bar) system of retract (if applicable)

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Check all linkages for play

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Check your wheels for possible damage and easy running

•

Check the wing mounting for tight fit and proper attachment

•

Check the canopy for tight fit and proper attachment

•

When starting the engine one person (minimum) has to hold the model

Содержание 42i

Страница 1: ...ENGINE MANUAL 3W 42i www 3w modellmotoren com ...

Страница 2: ...ower And a 36 month conditional warranty We wish you plenty of fun and success with your new 3W engine Sincerely The 3W Team Limited Warranty We grant a 36 month warranty from the date of purchase This warranty is limited to the replacement of defective parts that are a direct result of faulty material or manufacturing No claim concerning a defect caused by non compliance with installation or oper...

Страница 3: ...quate filtering of your fuel Maintain your engine properly keeping it clean etc Use a pre flight check list before flying your model Secure your model properly when starting Not use your fingers or hand to start your model Adjust your carburetor correctly Not adjust your carburetor while the engine is running Insure that your spark plug is in good condition and is secured correctly Insure that you...

Страница 4: ...x should be stiff enough to prevent engine vibration and it should also have a solid firewall The firewall of the motor box should be made from 1 4 aircraft plywood for engines up to 106cc or 3 8 aircraft plywood for engines in the 150cc class For builders experienced with making composite motor boxes a comparable strength should be attained It is absolutely vital to ensure a tension free mounting...

Страница 5: ...crank case will be distorted leading to the crankshaft starting to twist further leading to the crank case being destroyed To mount the engine directly onto a large wide former or firewall for the following reason a If the cylinder s is are too close to this wide former or firewall the floating air cannot pass freely over and then away from the cylinder s Cavitating hot air can will overheat the e...

Страница 6: ...ge A sketch is attached for your reference If you are in doubt do not hesitate to call us Operating temperature The normal operating temperature range for your engine is 176 212 Fahrenheit 80 100 Celsius If the temperature of the engine rises above 230 degrees Fahrenheit the engine is in an overheated condition where sealed ball bearings and needle bearings could be damaged Further you risk an elo...

Страница 7: ...dule and the mounting surface Without this 1 16 gap the ignition module can overheat Important If the electronic ignition overheats it will malfunction e g backfiring or shutting down Ignition details The red cable is positive The ignition timing has been set at our factory When fitting a new ignition it is important to achieve the correct coordination of the sensor s to the magnets Refer to our s...

Страница 8: ...tness by putting the propeller on a level surface The maximum difference of the blade heights should be no more than 1 64 The propeller tips must have an identical shape This is especially important when using 3 or 4 blade propellers You must use a drill press to drill your propeller You must drill the propeller from the rear A drill guide is recommended but the propeller washer can be used as a d...

Страница 9: ...ase the ends of the spring so that it no longer holds the butterfly closed Carburetor Linkage Included with your engine is a metal bracket to extent your carburetor pushrod horn Fix this bracket onto the carburetor horn with a 2 6m machine screw and nut Then solder the arm in place Refer to the attached illustration Note The use of a soft pushrod for the throttle plastic or nyrod is not recommende...

Страница 10: ...od that can be used for break in would be to set the engine between 2000 2500 rpm and let it run for 4 hours After that the engine would basically be broken in Note For break in a smaller propeller is recommended Important Remember that when the engine running ever person must stay behind the line of the rotating propeller never to the side or the front After Initial Break In Use high grade fully ...

Страница 11: ...io interference Use only ignition on off switches recommended by 3W 6 volts is required for the ignition Do not skimp on your throttle servo A high quality throttle servo is recommended for reliable and accurate operation of the carburetor Never fill the fuel tank via the carburetor fuel line Use the same I D for tank ventilation and the carburetor fuel line Use small plastic cable ties on all fue...

Страница 12: ...t the engine Not having the plane secure can be lead to serious accidents Depending on its size use one two or more helpers to secure your model Always tell your helpers to be ready for the model to start at full power Remember these engines have a high power output Do not put your finger s any items or any other parts of the body into the rotating propeller Never tune the carburetor whilst engine...

Страница 13: ...sible damage Check to be sure you have the throttle position at idle Check all batteries Check servo functions Check to see that the ignition switch is OFF Check pressure 6 8 bar system of retract if applicable Check all linkages for play Check your wheels for possible damage and easy running Check the wing mounting for tight fit and proper attachment Check the canopy for tight fit and proper atta...

Страница 14: ... 20 seconds Due to the high power and torque of the engine s it is not recommended to open the throttle abruptly Precision tuning of the carburetor The use of a tachometer is highly recommended And again never adjust the needles while the engine is running 1 Using the tachometer tune the engine for maximum power with the high needle H 2 Again using the tachometer richen the high needle H until the...

Страница 15: ...nd is vibrating strongly Balance the propeller Check the ignition timing Check your plumbing for air fuel leaks Check your spark plug for carbon and check the spark plug gap Check the motor mount to be sure it is rigid Check to make sure the engine is mounted on a level surface so that the crankcase is free of tension Check the engine and propeller bolts The engine doesn t reach a normal RPM at fu...

Страница 16: ...eed range Vitesse de rotation 1200 8500 min 1 rpm Weight Poids 1850 g 3 98 Ibs incl ignition Crankshaft 3 Ball bearings 3 Roulement à billes Pleuel Connection rod Bielle Needle bearings on both ends Roulement à aiguille aux deux cotés Benzin Gasoline Version 1 50 1 80 Mix full syntethic oil high Octane unleaded fuel 98 Octane is recommended IIS Zündung IIS Ignition V cc allumage 6 0 V Propeller Hé...

Страница 17: ...V 20 kV Rpm max 12 000 rpm 12 000 rpm Magnet red north pole upper dead point upper dead point Magnet green south pole 55 o before upper dead point 55 o before upper dead point Like all other electronic devices the ignition box gets warm under operating conditions For that reason a simple airflow has to be guaranteed Therefore the 4 delivered rubbermounts have to be used for installation insuring a...

Страница 18: ...votre droit de garantie en cas de réclamation n est valade que sur présentation de ce document Cette garantie est valable seulement si accompagnée d une preuve d achat Facture du revendeur Condizioni di garanzia Riconosciamo una garanzia di 36 mesi dalla date di acquisto Questa garanzia si limita esclusivamente alla sostituzi one gratuita dei pezzi difettosi la cui causa è da imputare a difetti di...

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