The Rotorway RW133 is a piston engine designed for use in helicopters and homebuilt aircraft.

Design and development

The RW-133 was developed in 1979 as an all-new piston engine for amateur-built aircraft, including a new crankcase oil system. The helicopter version features a dry sump oil system and a turbocharger option increasing power to 160 hp (119 kW).^[1] All components of the engine are cast and manufactured at RotorWay Foundries, except the Mallory Ignition and Dell'Orto carburetor.^[2]

Specifications (variant)

General characteristics

• Type: Four-cylinder air-cooled horizontally opposed piston engine
• Bore: 4 in (102 mm)
• Dry weight: 160 lb (73 kg) with propeller

Components

• Fuel system: Updraft carburetor with manual mixture control
• Fuel type: 80/87 avgas minimum
• Cooling system: Water-cooled

Performance

• Power output: 100 hp (75 kW) @2700rpm