Rotax 377

377
Type	Piston aero-engine
National origin	Austria
Manufacturer	Rotax
Major applications	Ultralight aircraft

The Rotax 377 is a 35 hp (26 kW), twin-cylinder, two-stroke aircraft engine, that was built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft.^[1]^[2]

Development

The Rotax 377 features piston-ported, air-cooled cylinder heads and cylinders, utilizing either a fan or free air for cooling. Lubrication is by use of pre-mixed fuel and oil. The 377 has a single Bosch Flywheel Magneto Generator 12 volt ignition system and is equipped with a 36 mm Bing double float carburetor, with either a hand lever or cable choke.^[1]^[2]

The Rotax 377 is no longer in production.^[1]

Applications

Specifications (377)

Data from ROTAX 377 UL Data Sheet^[1]

General characteristics

Type: two-stroke air-cooled aeroengine
Bore: 62 mm (2.44 in)
Stroke: 61 mm (2.40 in)
Displacement: 368.3 cc (22.48 cu in)
Dry weight: 38.4 kg (84.6 lb) (complete including reduction drive and exhaust system)

Components

Valvetrain: piston ports
Fuel system: pneumatic pump pressurized
Fuel type: premium unleaded autofuel
Oil system: premixed in the fuel at 50:1
Cooling system: fan or free air

Performance

Power output: 26 kW (35 hp) at 6500 rpm
Power-to-weight ratio: 0.67 kW/kg (0.41 hp/lb)

References

^ ^a ^b ^c ^d BRP-Rotax GmbH & Co. KG (n.d.). "ROTAX 377 UL - 35 HP" (PDF). Retrieved 14 March 2009.{{cite web}}: CS1 maint: year (link)
^ ^a ^b Raisner, William: LEAF catalog, pages 6-105. Leading Edge Airfoils, 1995.
^ Civil Aviation Authority (United Kingdom) (1995). "CIVIL AVIATION AUTHORITY – SAFETY REGULATION GROUP MICROLIGHT TYPE APPROVAL DATA SHEET (TADS)". Retrieved 14 March 2009.

[RotaxDataSheet-1] BRP-Rotax GmbH & Co. KG (n.d.). "ROTAX 377 UL - 35 HP" (PDF). Retrieved 14 March 2009.{{cite web}}: CS1 maint: year (link)

[Raisner-2] Raisner, William: LEAF catalog, pages 6-105. Leading Edge Airfoils, 1995.

[Sirocco-3] Civil Aviation Authority (United Kingdom) (1995). "CIVIL AVIATION AUTHORITY – SAFETY REGULATION GROUP MICROLIGHT TYPE APPROVAL DATA SHEET (TADS)". Retrieved 14 March 2009.

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v t e Rotax aircraft engines
Two-stroke piston engines	185 275 277 377 447 462 503 532 535 582 618
Four-stroke piston engines	912 914 915 916

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