1920 Briggs & Stratton - Flyer

The Briggs & Stratton Flyer 1920 is a vintage engine that was initially manufactured in the early 1920s for light aircraft purposes. The Flyer 1920 engine incorporates a 4-stroke, single-cylinder, air-cooled design with a displacement of 61 cubic inches (1000 cc). The engine's power output is rated at 20 horsepower, with a maximum engine speed of 2800 rpm, and a compression ratio of 4.3:1.

The Briggs & Stratton Flyer 1920 features a magneto ignition system, which delivers high voltage to the spark plug for efficient combustion. The magneto ignition system operates independently of the aircraft's power system, which ensures continuous operation even if the power system fails. The engine also incorporates a centrifugal governor, which regulates the engine's speed by adjusting the airflow into the carburetor. The governor is designed to maintain a constant engine speed, even when the load changes.

The carburetor used in the Briggs & Stratton Flyer 1920 is a modified Schebler carburetor, which is specifically designed for aircraft applications. The carburetor features a butterfly valve that controls the airflow into the engine, and a fuel jet that controls the amount of fuel that enters the engine. The carburetor also incorporates an air horn, which helps to increase the airflow velocity and improve the combustion process.

The Briggs & Stratton Flyer 1920 engine is air-cooled, with a unique cooling system that circulates the air over the fins and cylinder head to prevent the engine from overheating. The engine also includes an oil pressure system that lubricates the engine's moving parts and helps to cool the engine. The oil system incorporates a gear oil pump that circulates oil throughout the engine and a pressure relief valve that regulates the oil pressure.

The Briggs & Stratton Flyer 1920 engine is built with high-quality materials, including cast iron and steel, which makes it a durable and reliable engine. The engine's design is also relatively simple, which makes it easy to maintain and repair. Its small size and lightweight make it a perfect option for light aircraft.

In summary, the Briggs & Stratton Flyer 1920 is a vintage engine that incorporates a 4-stroke, single-cylinder, air-cooled design with a displacement of 61 cubic inches and a power output of 20 horsepower. The engine features a magneto ignition system, a centrifugal governor, a modified Schebler carburetor, and a unique cooling and oil pressure system. The engine is built with high-quality materials and is relatively simple to maintain and repair, with a small size and lightweight making it perfect for light aircraft applications.