ULPower UL260i

ULPower UL260iThe ULPower UL260i is a 2.6 l (2,592 cc, 158.17 cu in) four-cylinder, four-stroke, lightweight horizontally opposed aircraft engine produced by a Belgian company ULPower.

The UL260i engine has been developed specifically for use in light aircraft and is manufactured to the highest industry standards with fully electronic ignition and multi-point fuel injection (FADEC) system as standard equipment.

The UL260i motor cylinder bore is 105.6 mm (4.157 in) and piston stroke is 74 mm (2.913 in), compression ratio 8.16:1. The engine is equipped with: dual (redundant) electronic spark ignition system with variable timing; electronic multipoint fuel injection system (pressure and temperature compensated); direct propeller drive and electronic RPM limiter; electric fuel pump and pressure regulator; integrated permanent magnet AC generator with external rectifier-regulator; electric starter.

The output power rating is 97 HP (71 kW) at 3,300 rpm or 85 HP (63 kW) at 2,800 rpm, the maximum torque is 218 Nm (160.8 ft.lbf) at 2,700 rpm.

General information

Engine Specifications
Engine codeUL260i
Layout4 stroke, 4 cylinder, horizontally opposed
Fuel typeRegular unleaded automotive gasoline with min. 95 Octane RON (87 MON = 91 AKI)
AVGAS 100LL may also be used if regular fuel is not available.
Displacement2.6 l (2,592 cc, 158.17 cu in)
Direction of rotationClockwise – seen from cockpit
Fuel systemElectronic multipoint fuel injection
Power adderNone
Power output97 HP (71 kW) at 3,300 rpm or 85 HP (63 kW) at 2,800 rpm
Torque output218 Nm (160.8 ft.lbf) at 2,700 rpm.
Firing order1-3-4-2
Dimensions (L x W x H):540 mm (21.3 in) x 654 mm (25.7 in) x 472 mm (18.6 in)
Installed weight72.3 kg (159.3 lbs)

Cylinder block and head

The ULPower UL260i aircraft engine has ram air-cooled cylinders and cylinder heads, five bearing crankshaft with surface hardening treatment and additional large thrust bearing (ball bearing type). The blockhead has single central camshaft, pushrods, tappets and over-head valves without hydraulic compensators.

Cylinder block and head
Compression ratio:8.16:1
Cylinder bore:105.6 mm (4.157 in)
Piston stroke:74 mm (2.913 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Valve Arrangement:OHV
Valves:8 (2 valves per cylinder)

Maintenance data

Tappet clearance (Cold)
Intake valve0.15±0.05 mm (0.0059±0.0020 in).
Exhaust valve
Oil system
Engine oil capacity (Refill capacity)2.5 L (0.66 US gal)
Ignition system
Ignition coil Bosch: FR 5 DTC

Vehicle applications

AircraftYears Produced
A2 CZ Elipse Spirit
Vans Range of Aircraft
Staken Flitzer
Zenith CH750
Zenith CH650
Tecnam P92 Echo
Aerocomp VM-1 Esqual
BRM Aero Bristell
Corvus Fusion
Kohl Mythos
Lanitz Escapade Two
Micro Aviation Bantam
Orel VH2 Streamline
Reality Escapade UK
Silence Twister
Sonex Aircraft Onex
Trixy G 4-2 R
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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