503 UL is a piston engine model used in aircraft.
Engine Family: piston
Bore: 72 millimetre
Compression ratio: 6.2
Cooling system: Air
Cylinder configuration: Inline
Cylinder count: 2
Displacement: 497 cubic-centimetre
Dry weight: 39 kilogram
Fuel grade: RON 91
Fuel type: Mogas
Max. continuous RPM: 6500
Max. continuous hp: 50 horsepower
Max. takeoff RPM: 6500
Max. takeoff hp: 50 horsepower
Stroke: 61 millimetre
ICAO: ULAC
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