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The Wright R-3350 Duplex-Cyclone is an American twin-row, supercharged, air-cooled, radial aircraft engine with 18 cylinders displacing nearly 3,350 cubic inches (54.9 L). Power ranged from 2,200 to 3,700 hp (1,640 to 2,760 kW), depending on model.
Later that year the US Navy awarded Wright a contract to develop two new air-cooled radial engines. The first, called the P-1, was a 9-cylinder single row design of 1,652 cu in (27.07 L) displacement that was derived from an earlier Lawrence design, it produced 400 hp (300 kW). [ 2 ]
Wright R-2600 Twin Cyclone; Wright R-3350 Duplex-Cyclone; Wright R-4090 Cyclone 22; T. Wright T-3 Tornado; V. Wright Vertical 4; W. Wright Aeronautical; Wright R-2160 ...
Usage of the terms supercharged and turbosupercharged has varied with time, for example the makers of the Wright R-3350 Duplex-Cyclone compound engine described it at the time as turbosupercharged. It is however a compound engine, and a similar engine produced today would be described as supercharged rather than turbocharged.
Wright R-3350 Duplex-Cyclone Turbo-Compound radial engine.. The first aircraft engine to be tested with a power-recovery turbine was the Rolls-Royce Crecy.This was used primarily to drive a geared centrifugal supercharger, although it was also coupled to the crankshaft and gave an extra 15 to 35 percent fuel economy.
The prototype XC-97 was powered by the same 2,200 hp (1,600 kW) Wright R-3350 engines as used in the B-29. The XC-97 took off for its first flight on November 9, 1944, [4] just after the death of Boeing president Philip G. Johnson. YC-97 Stratofreighter with the shorter fin and smaller engines of the B-29 in 1947
The plane first flew on 27 June 1941, more than three years after the construction contract was awarded. It was based at Wright Field from January to November 1942. [2] [b] In 1943, the Wright R-3350 engines were replaced with liquid-cooled W24 Allison V-3420-11 by the aircraft division of Fisher Body in support of the XB-39 project.
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