A radial engine is a reciprocating type internal combustion engine configuration where the cylinders are arranged to point outward from a central crankshaft, as in the arrangement of the spokes of a wheel. This type of configuration was commonly used in aircraft engines before the introduction of turbine engines. Makers of radial engines include Verner, Rotec Engineering, BMW and Wright.
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The BMW 801 is a 14-cylinder, supercharged, vintage air-cooled radial engine which was used in a number of Nazi aircraft during World War II. The 801 possesses a displacement of 2,550 cubic inches, and a bore and stroke of 6.14 inches by 6.14 inches. It is able to output 1,600hp at 2,700rpm at take, and is equipped with a gear-driven, single-stage, two-speed supercharger. It has a length of 79 inches, a diameter of 51 inches and a dry weight of 1055 Kilogram.
Wright Tornado R-2160
The Wright Tornado R-2160 is a powerful 42-cylinder radial engine which was first released in 1941. It possesses a displacement of 2,160 cubic inches, a bore and stroke of 4.25 inches by 4.625 inches and a compression ratio of 6:1. It is equipped with twin turbosuperchargers aspiration, and the cylinders have a seven-banks, six-row water-cooled configuration. It is able to generate a maximum power output of 2,350hp. The R-2160 has a length of 96 inches, a diameter of 35.5 inches and a weight of 10.9 Kilogram.
The Rotec R2800 is a small aircraft engine with a displacement of 172 cubic inches. It possesses a standard compression ratio of 8.5:1 and possesses a conventional valve train of two per cylinder. It is equipped with an electric 12V starter motor and a 35-amp alternator with built-in voltage regulator. The R2800 is able to generate a maximum power output of 110hp at 3,700 geared rpms. It possesses a length of 31.9 inches and a dry weight with accessories of 102kg.
Verner's Scarlett range of radial motors have a range of engine specifications. For instance, the bottom of the range Scarlett 3 is a three-cylinder engine with a displacement of 1995cc, and is able to generate a power output of 71hp at 3,000 rpms. The mid-range Scarlet 5 possesses five cylinders and has a displacement of 3,325cc. It is able to generate a power output of 125hp at 3,000 rpms. The more powerful Scarlet 7 is a seven-cylinder radial engine with a displacement of 4,655cc, and is able to generate a power output of 172hp at 3,000 rpms.
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