The 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 code | UL260i |
| Layout | 4 stroke, 4 cylinder, horizontally opposed |
| Fuel type | Regular unleaded automotive gasoline with min. 95 Octane RON (87 MON = 91 AKI) AVGAS 100LL may also be used if regular fuel is not available. |
| Displacement | 2.6 l (2,592 cc, 158.17 cu in) |
| Direction of rotation | Clockwise – seen from cockpit |
| Fuel system | Electronic multipoint fuel injection |
| Power adder | None |
| Power output | 97 HP (71 kW) at 3,300 rpm or 85 HP (63 kW) at 2,800 rpm |
| Torque output | 218 Nm (160.8 ft.lbf) at 2,700 rpm. |
| Firing order | 1-3-4-2 |
| Dimensions (L x W x H): | 540 mm (21.3 in) x 654 mm (25.7 in) x 472 mm (18.6 in) |
| Installed weight | 72.3 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 valve | 0.15±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
| Aircraft | Years 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 |
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