ULPOWER UL260i User manual

UL26Oi
UL26OiF
UL26OiS
UL26OiSA
Operating
Manual
MO 260A01 Revision No: 6 Date: 2014-09-15

Operating Manual ULPOWER UL260i UL260iFUL260iSUL260iSA
MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 1 of 22
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.
Remarks
The images in this manual show the typical construction. They may not represent in full detail or
the exact shape of the parts which have the same or similar function.
Specifications are given in the SI metric system with the USA equivalent in parenthesis. Where
precise accuracy is not required, some conversions are rounded off for easier use.
In addition to this Operating Manual, please refer to the following:
Installation Manual
Maintenance Manual
Please make sure you have the latest version available of the applicable manual.
Modifications
The information and components/system descriptions contained in this Operating Manual are
correct at the time of publication. ULPower, however, maintains a policy of continuous
improvement of its products without imposing upon itself any obligation to install them on its
products previously manufactured.
ULPower reserves the right at any time to discontinue or change specifications, designs, features,
models or equipment without incurring obligation.
Engine serial number
On all enquiries or spare parts orders, always indicate the engine serial number, as the
manufacturer makes modifications to the engine for further development.
Repeating symbols
This manual uses the following symbols to emphasize particular information. These indications are
important and must be respected.
WARNING : Identifies an instruction which, if not followed, may cause serious injury
including the possibility of death.
Attention : Denotes an instruction which, if not followed, may severely damage the engine
or other components.
Note : Indicates supplementary information which may be needed to fully complete or
understand an instruction.

Operating Manual ULPOWER UL260i UL260iFUL260iSUL260iSA
MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 2 of 22
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.
You should be aware that any engine may seize or stall at any time. This could lead to a crash
landing and possible severe injury or death. For this reason, we recommend strict compliance
with the maintenance and operation and any additional information which may be given to you by
your dealer.
Never fly the aircraft equipped with this engine at locations, airspeeds, altitudes, or other
circumstances from which a successful no-power landing cannot be made, after sudden engine
stoppage.
This engine is not suited for acrobatics (inverted flight, etc.).
It should be clear that the choice, selection and use of this particular engine on any aircraft is at
the sole discretion and responsibility of the aircraft manufacturer, assembler and owner/user.
ULPower makes no warranty or representation on the suitability of its engine's use on any
particular aircraft. Furthermore, ULPower makes no warranty or representation of this engine's
suitability with any other part, component or system which may be selected by the aircraft
manufacturer, assembler or user for aircraft application.
Never run the engine without a propeller or flywheel as this will inevitably cause engine damage
and present a hazard of explosion.
Propeller/flywheel and its attachment with a moment of inertia in excess of the specified value
must not be used and releases engine manufacturer from any liability.
Improper engine installation and use of unsuitable piping for fuel-, cooling- and lubrication system
releases engine manufacturer from any liability.
Unauthorized modifications of engine or aircraft will automatically exclude any liability of the
manufacturer for direct, indirect and/or sequential damage.
Spare parts must meet with the requirements defined by the engine manufacturer. This is only
warranted by use of genuine ULPower spare parts and/or accessories. They are available at the
authorized ULPower distribution- and service partners.
The use of anything other than genuine ULPower spare parts and/or accessories will render any
warranty relating to this engine null and void.
Respect all government or local rules pertaining to flight operation in your flying area. Fly only
when and where conditions, topography, and airspeeds are safest.
Select and use proper and calibrated aircraft instrumentation. This instrumentation is not
included with the basic ULPower engine.
Before flight, ensure that all engine controls are operative. Make sure all controls can be reached
in case of an emergency.
Unless in a run up area, never run the engine with the propeller turning while on the ground. Do
not operate engine if bystanders are close.
In the interest of safety, the aircraft must not be left unattended while the engine is running.
Keep an engine log and respect engine and aircraft maintenance schedules. Keep the engine in
top operating condition at all times. Do not operate any aircraft which is not properly maintained
or has engine operating irregularities which have not been corrected.

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MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 3 of 22
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 UL260i UL260iFUL260iSUL260iSA
MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 4 of 22
Table of contents
Preface ..................................................................................................................1
Remarks...............................................................................................................1
Modifications.........................................................................................................1
Engine serial number ...............................................................................................1
Repeating symbols ..................................................................................................1
Safety information....................................................................................................2
Table of contents .....................................................................................................4
Engine description ....................................................................................................6
General Description ................................................................................................6
Specifications ........................................................................................................6
Description of basic standard engine and accessories........................................................7
Engine views ...........................................................................................................8
Denomination of cylinders..........................................................................................9
Description of systems...............................................................................................9
Lubricant system ....................................................................................................9
Fuel system ..........................................................................................................9
Electronic Engine Management system........................................................................ 10
Cooling system..................................................................................................... 10
General operating limits .......................................................................................... 11
Speed................................................................................................................ 11
Running in .......................................................................................................... 11
Performance (ISA)................................................................................................. 11
Acceleration ....................................................................................................... 11
Oil pressure ........................................................................................................ 11
Oil level............................................................................................................. 11
Oil temperature ................................................................................................... 11
Cylinder head temperature ..................................................................................... 11
Manifold air temperature........................................................................................ 12
Outside air temperature ......................................................................................... 12
Relative fuel pressure ............................................................................................ 12
Deviation from bank angle ...................................................................................... 12
Electrical power ................................................................................................... 12
Maintenance ......................................................................................................... 12
Engine performance................................................................................................ 13
Performance graphs for standard conditions (ISA) .......................................................... 13
Performance graph for non-standard conditions ............................................................ 14
Operating media .................................................................................................... 16
Fuel.................................................................................................................. 16
Lubricants .......................................................................................................... 16
Standard operation ................................................................................................. 17
Daily/Pre-flight checks........................................................................................... 17
Engine start ........................................................................................................ 17
Prior to take-off................................................................................................... 18
Warming up period:............................................................................................ 18
Idle speed:....................................................................................................... 18
Throttle response: ............................................................................................. 18
Ignition test: .................................................................................................... 18
Take-off............................................................................................................. 18
Cruise ............................................................................................................... 18

Operating Manual ULPOWER UL260i UL260iFUL260iSUL260iSA
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Engine shut-down ................................................................................................. 18
Engine storage ..................................................................................................... 19
Abnormal operation ................................................................................................ 20
Abnormal running on ignition check ........................................................................... 20
Sudden engine stop ............................................................................................... 20
Nearing maximum engine speed ............................................................................... 20
Exceeding of max. admissible cylinder head temperature ................................................ 20
Exceeding of max. admissible oil temperature .............................................................. 21
Oil pressure below minimum.................................................................................... 21
Exceeding of max. admissible oil pressure ................................................................... 21
Relative fuel pressure deviates from normal ................................................................ 21
Single CHT and/or EGT drop .................................................................................... 22
Knocking ............................................................................................................ 22
Low battery voltage .............................................................................................. 22

Operating Manual ULPOWER UL260i UL260iFUL260iSUL260iSA
MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 6 of 22
Engine description
General Description
4 stroke, 4 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 forced lubrication with integrated pressure regulator
Ram air cooled cylinders and cylinder heads
Integrated AC generator, external rectifier-regulator
Electric starter
Electric fuel pump and pressure regulator
Specifications
UL260i
UL260iF
UL260iS
UL260iSA
Displacement:
2592 cc
Bore:
105.6 mm
Stroke:
74 mm
Compression Ratio:
8,16 : 1
9,1:1
Firing order:
1 –3 –2 –4
Direction of Rotation:
Clockwise –Pilot's view –Tractor configuration
Torque (ISA conditions):
217 Nm @ 2500 rpm
237Nm @ 2800 rpm
Power rating (ISA conditions):
97 hp @ 3300 rpm
(85 hp @ 2800 rpm)
100 hp @ 3100 rpm
(92 hp @ 2800 rpm)
107 hp @ 3300 rpm
(93 hp @ 2800 rpm)
Basic standard engine weight:
60,1 kg (including starter motor and alternator)
61 kg
DC output:
30 Amp
Oil capacity:
3 L
Fuel (unleaded):
MOGAS with min. 95
octane rating or
AVGAS ( 95 octa =
87Mon = 91AKI )
MOGAS with
min. 98 octane rating or AVGAS ( 98 Oct =
90MON = 94 AKI )

Operating Manual ULPOWER UL260i UL260iFUL260iSUL260iSA
MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 7 of 22
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 wiring
Fuel pump, filters and fuel lines
Exhaust system
Cooling ducts for cylinders and cylinder heads
Temperature and pressure sensors, wiring (and gauges)
External rectifier-regulator
Optional oil cooler and connections

Operating Manual ULPOWER UL260i UL260iFUL260iSUL260iSA
MO 260A01 Revision No: 6 Date: 2014-09-15 Page: 8 of 22
Engine views
(*) Dimension for standard prop flange l =55
Different prop flange are available