Lycoming O-360 Series Aircraft Engine

The Lycoming O-360 is a four-cylinder, horizontally opposed, air-cooled aircraft engine that is widely regarded as one of the most popular and reliable engines in general aviation. It is an evolution of the O-320 series, offering increased power and performance.

Part Number

Key Specifications

• Type: Four-cylinder, horizontally opposed (flat-four), air-cooled
• Displacement: 361 cubic inches (5.9 liters)
• Power Output: Typically produces 180 horsepower (depending on the specific model and configuration)
• Compression Ratio: Varies by model, typically 8.5:1
• Weight: Approximately 258 to 280 pounds (dry weight, depending on the model)
• Fuel Type: Aviation gasoline (100LL or lower-octane fuels, depending on the model)
• Cooling: Air-cooled
• Ignition System: Dual magnetos for redundancy
• Redline RPM: Typically 2,700 RPM

Applications

The O-360 engine is used in a wide range of general aviation aircraft, including:

• Cessna 172 (later models)
• Piper PA-28 Cherokee
• Piper PA-32 Cherokee Six
• Grumman American AA-5
• Van's RV series (experimental aircraft)
• Aeronca Champion
• Mooney M20

Variants

The O-360 series includes several models, each tailored for specific applications or aircraft. Some notable variants include:

• O-360-A1A: 180 hp, used in the Cessna 172 and Piper PA-28.
• O-360-A1D: 180 hp, used in the Piper PA-28 and other aircraft.
• O-360-A1G6: 180 hp, with a higher compression ratio for improved performance.
• O-360-C1A: 180 hp, used in helicopters, such as the Bell 47.
• O-360-E1A: 180 hp, used in the Mooney M20.
• O-360-F1A: 180 hp, used in the Grumman American AA-5.

Features

• Reliability: Known for its durability and long service life when properly maintained.
• Simplicity: The engine's design is straightforward, making it easier to maintain and repair.
• Versatility: Used in both certified and experimental aircraft.
• Dual Magneto System: Provides redundancy for improved safety.

Advantages

• Proven design with decades of reliable service.
• Wide availability of parts and support.
• Suitable for a variety of aircraft types.

The Lycoming O-360 remains a cornerstone of general aviation due to its reliability, simplicity, and widespread use. It continues to power many training and recreational aircraft worldwide.

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