UL39Oi UL39OiS UL39OiSA Operating Manual MO 390A01 Revision No: 2 Date: 2014-09-15
ULPOWER Operating Manual UL390i UL390iS UL390iSA Preface Thank you for deciding to use a ULPower engine. Before starting the engine, carefully read this manual. The Manual will provide you with basic information on the safe operation of the engine. If any passages of the manual are not completely understood or in case of questions, please contact a ULPower authorised representative. We hope you will have much pleasure and satisfaction flying your aircraft powered by a ULPower engine.
ULPOWER Operating Manual UL390i UL390iS UL390iSA Safety information The engine should only be installed and placed into operation by persons familiar with the use of the engine and informed with regard to possible hazards. Only ULPower authorized service centres are qualified to work on these engines. This engine is designed for possible application on aircraft used in VFR conditions which have the capabilities of controlled gliding without engine power.
Operating Manual ULPOWER UL390i UL390iS UL390iSA To eliminate possible injury or damage, ensure any loose equipment or tools are properly secured before starting the engine. When in storage protect the engine, fuel, lubrication, induction and exhaust system from contamination and exposure. Never operate the engine without sufficient quantities of lubricating oil and cooling air. Allow the engine to cool at idle for several minutes before turning off the engine.
Operating Manual ULPOWER UL390i UL390iS UL390iSA Table of contents Preface ..................................................................................................................1 Remarks ............................................................................................................... 1 Modifications ......................................................................................................... 1 Engine serial number .....................................................
Operating Manual ULPOWER UL390i UL390iS UL390iSA Engine shut-down ................................................................................................. 17 Engine storage ..................................................................................................... 18 Abnormal operation ................................................................................................ 19 Abnormal running on ignition check ....................................................................
ULPOWER Operating Manual UL390i UL390iS UL390iSA Engine description General Description 4 stroke, 6 cylinder, horizontally opposed Electronic multipoint fuel injection (pressure and temperature compensated) Electronic spark ignition (variable timing) Electronic RPM limiter Direct propeller drive 5 bearing crankshaft with a 6th large thrust bearing (ball bearing type) Single central camshaft Push rods, Solid Tappets (no hydraulic compensation) and Over head valves Wet sump force
Operating Manual ULPOWER UL390i UL390iS UL390iSA Description of basic standard engine and accessories The basic standard engine assembly consists of the following: Engine assembly Injectors, fuel pressure regulator and spark plugs Intake manifold, throttle and air filter Electric starter motor Integrated AC generator Propeller flange In addition to the basic standard engine assembly, following external items are necessary accessories: ECU, ignition coils and electrical wiri
ULPOWER Operating Manual UL390i UL390iS UL390iSA Engine views (*) Dimension for standard prop flange l =55 Different prop flange are available MO 390A01 Revision No: 2 Date: 2014-09-15 Page: 8 of 22
Operating Manual ULPOWER UL390i UL390iS UL390iSA Denomination of cylinders Description of systems Lubricant system The oil is drawn from the wet sump through a coarse filter on the oil pickup tube to the oil pump. From the pressure side of the pump, the oil passes the oil cooler (optional) and oil filter, after which it enters the main oil gallery to flow to various points of lubrication in the engine.
Operating Manual Note: ULPOWER UL390i UL390iS UL390iSA The fuel pressure sensor should measure the pressure in the fuel line between the electric fuel pump and the engine. Electronic Engine Management system The UL390i is equipped with an electronic injection and ignition system. RPM and Throttle Position are the main inputs to the ECU (Engine Control Unit).
ULPOWER Operating Manual UL390i UL390iS UL390iSA General operating limits Speed Max. engine speed ...................... Recommended prop speed ............ Normal idle speed ....................... Min. idle speed .......................... 3300 rpm 2400 - 2800 rpm 850 rpm 700 rpm Running in To run in a new engine, it is recommended to limit the speed at 3000 rpm for the first 5 hours.
ULPOWER Operating Manual UL390i UL390iS UL390iSA Manifold air temperature Max. ....................................... 40°C (104°F) May not exceed outside air temperature Outside air temperature Max. ....................................... 65°C (150°F) Min. ........................................ -25°C (-15°F) Relative fuel pressure Relative fuel pressure is the difference between the pressure in the fuel line and the pressure in the intake manifold Max. ....................................... 3.
Operating Manual ULPOWER UL390i UL390iS UL390iSA Engine performance Performance graphs for standard conditions (ISA) The following graphs shows the performance of the UL390i The following graphs shows the performance of the UL390iS MO 390A01 Revision No: 2 Date: 2014-09-15 Page: 13 of 22
Operating Manual ULPOWER UL390i UL390iS UL390iSA Performance graph for non-standard conditions The following graph shows the calculated performance drop with increasing flight altitude. The curves show the performance at 3300, 2800, 2500 and 2200 rpm, at full throttle.
ULPOWER Operating Manual UL390i UL390iS UL390iSA Operating media Fuel UL390i Regular unleaded automotive fuel with a minimum of 95 octane RON (= 87 MON=91AKI) should be used to operate the engine. AVGAS 100 LL my be used if regular fuel is not available. Note: Due to higher lead content in AVGAS, the wear of the valve and valve seats, the deposits in combustion chamber and lead sentiments in the lubrication system will increase.
ULPOWER Operating Manual UL390i UL390iS UL390iSA Standard operation Daily/Pre-flight checks WARNING: Conduct checks on cold engines only as there could be a risk of burns and scalds! Turn the propeller by hand in the direction of engine rotation several times and observe engine for odd noises or excessive resistance and normal compression. If irregular, first check tappet adjustment. WARNING: Make sure ignition is turned OFF when inspecting the engine.
ULPOWER Operating Manual UL390i UL390iS UL390iSA Prior to take-off Warming up period: Start warming up period with engine running between 1200 and 1500 rpm, duration depending on ambient temperature, until: oil temperature reaches at least 40°C (105°F) cylinder head temperatures are not less than 50°C (125°F) Attention: Always check temperatures and pressures are within limits. Idle speed: When warm, engine can be set at idle speed.
Operating Manual Note: ULPOWER UL390i UL390iS UL390iSA If temperatures are still at the high end of the limits, permit the engine to cool down by idling the engine for a few minutes before shut-down. Engine storage For long out of service periods we recommend the following to protect the engine against corrosion.
ULPOWER Operating Manual UL390i UL390iS UL390iSA Abnormal operation WARNING: At unusual engine behaviour, follow the guidelines below and perform the necessary maintenance and/or checks before next flight. All problems and carried out maintenance/repairs/replacements should be noted in the engine logbook. Abnormal running on ignition check When one ignition coil is switched off and the engine runs differently than with both coils switched on, there are multiple causes possible.
ULPOWER Operating Manual UL390i UL390iS UL390iSA On the ground, verify that cooling ducts are still in place and air is free to flow over and through cylinder head cooling fins. If problem remains, the engine should be sent for inspection/overhaul to a ULPower authorised service-centre. Exceeding of max. admissible oil temperature Reduce engine power setting to the minimum necessary and verify that oil temperature drops. Continue normal flight within temperature limits.
ULPOWER Operating Manual UL390i UL390iS UL390iSA On the ground, check fuel or electrical system for possible cause. Replace filter(s), pump(s), lines, pressure regulator or sensor as necessary. Test the fuel system with ignition off and master switch and fuel pump on. Single CHT and/or EGT drop Verify that both CHT and EGT of the same cylinder have dropped. If not, CHT or EGT probe or signal intake have a malfunction. Correct before next flight.
