The KFM 112M is a four-cylinder, four-stroke, dual ignition, horizontally opposed aircraft engine designed for ultralight aircraft and motor gliders.^[1]

The engine was designed and produced by the KFM (Komet Flight Motor) Aircraft Motors Division of Italian American Motor Engineering of Italy as a follow-on engine to their KFM 107 series and has been out of production since 1990.^[1]

Development

The KFM 112 is a conventional four-cylinder engine that is very compact and lightweight at only 54 kg (119 lb), including the starter, alternator and carburetor. The engine features dual electronic ignition, a single OVC carburetor, hydraulic valve lifters, nickel-silicon treated cylinders and bi-metallic valves with chromed stems. It was offered without a reduction system. Starting is electric starter only.^[1]

The engine produces 62 hp (46 kW) at 3400 rpm for three minutes for take-off, 60 hp (45 kW) at 3200 rpm for five minutes and 54 hp (40 kW) at 3090 rpm continuous.^[1]

Applications

• Partenavia P.86 Mosquito^[2]

Specifications (112M)

Data from Black^[1]

General characteristics

• Type: Four-cylinder, horizontally opposed, four-stroke aircraft engine
• Bore: 90 mm (3.54 in)
• Stroke: 64 mm (2.52 in)
• Displacement: 1628.60 cc (99.38 cu in)
• Length: 583 mm (22.95 in)
• Width: 603 mm (23.74 in)
• Height: 380 mm (14.96 in)
• Dry weight: 54 kg (119 lb)

Components

• Fuel type: premium auto fuel or avgas
• Oil system: pressurized
• Cooling system: air-cooled
• Reduction gear: none

Performance

• Power output: 62 hp (46 kW) at 3400 rpm for three minutes for take-off, 60 hp (45 kW) at 3200 rpm for five minutes and 54 hp (40 kW) at 3090 rpm continuous
• Compression ratio: 9.5:1
• Fuel consumption: 16.3 L/h (4.3 US gal/h) at full power, 11.2 L/h (2.97 US gal/h) at 70% power.
• Specific fuel consumption: 212 g/(hp·h)(horsepower-hour) (0.46 lb/(hp·h)) at 90% power, 185 g/(hp·h) ((0.42 lb/(hp·h)) at 70% power
• Power-to-weight ratio: 0.90 kg/hp (1.98 lb/hp)