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The Pratt & Whitney R-985 Wasp Junior is a series of nine-cylinder, air-cooled, radial aircraft engines built by the Pratt & Whitney Aircraft Company from the 1930s to the 1950s. These engines have a displacement of 985 in 3 (16 L); initial versions produced 300 hp (220 kW), while the most widely used versions produce 450 hp (340 kW).
Pratt & Whitney R-985 Wasp Junior. The Pratt & Whitney R-1340 Wasp is an aircraft engine of the reciprocating type that was widely used in American aircraft from the 1920s onward. It was the Pratt & Whitney aircraft company's first engine, and the first of the famed Wasp series. It was a single-row, nine- cylinder, air-cooled, radial design ...
The Wright R-975 Whirlwind was a series of nine-cylinder air-cooled radial aircraft engines built by the Wright Aeronautical division of Curtiss-Wright. These engines had a displacement of about 975 cu in (15.98 L) and power ratings of 300–450 hp (220–340 kW). They were the largest members of the Wright Whirlwind engine family to be ...
The engine was first produced in 1927 at 450 hp (335 kW), which was soon improved in the I-B version to 525 hp (390 kW) by increasing the compression ratio to 7:1. The I-B variant saw widespread use in the Hawker Hart family of aircraft, a mainstay of British air power during the early 1930s.
Walbro Corporation is a manufacturing company that specializes in small engine carburetion and supplier of auto parts. Otherwise, Walbro carburetors are commonly used on line-trimmers, leaf blowers, chain-saws, and edgers. Walbro was founded by Walter E. Walpole in November 1950. A product typically found in the automotive world of fuel ...
Bristol Sycamore — 1x Mk. 173, 550 hp (410 kW) Cunliffe-Owen Concordia — 2x LE.4M, 550 hp; de Havilland Canada DHC-2 Beaver Mk.2 — 1x 502/4, 520 hp, 520shp (388 kW) Fairchild F-11-2 Husky — 1x 550 hp; Fairey Gyrodyne — one 525 hp to drive rotor and propeller; Fairey Jet Gyrodyne — one 525 hp to drive air compressor and propellers
Both the H-45 and the H-47 were powered by a single, uncowled, Pratt & Whitney 9-cylinder radial: the H-45 had a 450 hp (335 kW) Wasp and the H-47 a 525 hp (390 kW) Hornet. The Hornet gave a 10 mph (16 km/h) increase in cruising speed and a slight (3%) increase in useful load to 2300 lb (1043 kg). [2] Both types first flew in 1928.
The second, the P-2, had the same 1,652 cu in (27.07 L) displacement as the P-1, but was an improved design that produced 435 hp (324 kW). [2] Neither engine entered production, with the Navy selecting the superior Pratt & Whitney R-1340 Wasp , so in 1926 work started on the improved 1,750 cu in (28.7 L) design, which became the R-1750 Cyclone.
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