The LeBlond radial engines, later produced under the name Ken-Royce, were a family of 3-cylinder, 5-cylinder and 7-cylinder, air-cooled radial engines for aircraft, built in the 1930s by the

LeBlond Aircraft Engine Corporation LeBlond Aircraft Engine Corporation was a small engine manufacturer incorporated on April 11, 1928. It was located on the northwest corner of Madison and Edwards Roads in Norwood, Ohio"Companies in Norwood, Ohio - "L"." RootsWeb.com. N.p., n.d. Web ...

until the operation was sold to

Rearwin Airplanes Rearwin Airplanes was a series of US airplane-manufacturing businesses founded by Andrew ("Rae") Rearwin in 1928. Rae Rearwin was an American businessman who had developed several successful business ventures in the Salina, Kansas area in the earl ...

in 1937 and renamed Ken-Royce Engines.

Products

;LeBlond 40-3:3-cylinder air-cooled radial engine. ;LeBlond 60-5D :Introduced in 1928, the 60-5D was a 60 hp (45 kw) 5-cylinder, air-cooled, radial piston engine with a displacement of 234 cuin (3.8 L)."LeBlond Engines aero engines: LeBlond 5D." PilotFriend. N.p., n.d. Web. 20 June 2010. . This model used iron cylinder heads"Rearwin Aircraft Engines." PilotFriend. N.p., n.d. Web. 20 June 2010. . and was a direct development of the Detroit Air-Cat. ;LeBlond 70-5DE :Introduced in 1930, the 70-5F was a 70 hp (52 kw) at 1,950 rpm 5-cylinder, air-cooled, radial piston engine, (4.125 x 3.75 = 250.57 cuin (4.11 L)), using iron cylinder heads and two bearings. ;LeBlond 85-5DF :Introduced in 1930, the 85-5F was an 85 hp (63 kw) at 1,975 rpm 5-cylinder, air-cooled, radial piston engine, (4.25 x 3.75 = 265.99 (4.36 L)), using aluminum cylinder heads and three bearings. ;LeBlond 70-5E :Introduced in 1930, the 70-5E was a 70 hp (52 kw) 5-cylinder, air-cooled, radial piston engine. Production of the 5E continued under Ken-Royce Engines as the Ken-Royce 5E. ;LeBlond 80-5F :Introduced in 1930, the 80-5F was an 80 hp (60 kw) 5-cylinder, air-cooled, radial piston engine with a displacement of 266 cubic inches (4.4 litres) Using three bearings as developed for the earlier 5DF series, the LeBlond 5F was introduced in 1930. When aircraft powered with the 5F were commandeered by the U.S. Army, the engine was re-designated the R-265."LeBlond / Ken-Royce Engines aircraft engine specifications." PilotFriend. N.p., n.d. Web. 20 June 2010. . This engine was the last of the so-called 'greasers'. Production of the 5F continued under Ken-Royce Engines as the Ken-Royce 5G. ;LeBlond 85-5DF :Introduced in 1930, the 85-5F was an 85 hp (63 kw) 5-cylinder, air-cooled, radial piston engine with a displacement of 266 cubic inches (4.4 litres) ;LeBlond 90-5F :Introduced in 1930, the 90-5F was a 90 hp (68 kw) 5-cylinder, air-cooled, radial piston engine with a displacement of 266 cubic inches (4.4 litres) ;LeBlond 90-5G :Introduced in 1930, the 90-5G was a 90 hp (68 kw) 5-cylinder, air-cooled, radial piston engine with a displacement of 266 cubic inches (4.4 litres) Production of the 5G continued under Ken-Royce Engines as the Ken-Royce 5G. ;LeBlond 90-7D: 90 hp (67.1 kW) at 1,975rpm 4.125 x 3.75 = 350.81 cu in (5.75 L) ;LeBlond 110-7DF:110 hp (82.1 kW) at 2,150rpm 4.25 x 3.75 = 372.39 cu in (6.10 L) ;LeBlond 120-7 ;Ken-Royce 7F :Introduced by Ken-Royce Engines in 1939 as a 120hp development of the LeBlond 7DF by increasing the

compression ratio The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values. A fundamental specification for such engines, it is measured two ways: the stati ...

and changing the intake and

carburetor A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meteri ...

Applications

Aeronca L The Aeronca L was a 1930s American cabin monoplane designed and built, in small numbers, by Aeronca Aircraft. It differed significantly from other Aeronca planes by the use of radial engines, streamlining, and a cantilever low wing.Harris, Richar ...

Arrow Sport The Arrow Sport was a two-seat sporting biplane aircraft built in the United States in the 1920s and 1930s. Design and construction The plane was designed by Swen Swanson and it was of largely conventional configuration with tailskid undercarr ...

Rearwin Sportster The Rearwin Sportster is a 1930s American two-seat, high-winged, cabin monoplane designed and built by Rearwin Aircraft & Engines for sport/touring use. Development The Sportster began development while Rearwin was still certifying the previou ...

Vulcan American Moth Monoplane The Vulcan American Moth Monoplane was an early parasol-wing monoplane developed by the Doyle brothers. Development Wilson Doyle graduated Harvard in 1925, and his brother Harvey from Yale the same year. They moved to Detroit looking for employ ...

Niagara Amphibion Niagara may refer to: Geography Niagara Falls and nearby places In both the United States and Canada *Niagara Falls, the famous waterfalls in the Niagara River * Niagara River, part of the U.S.–Canada border * Niagara Escarpment, the cliff ...

Watkins Skylark The Watkins Skylark was an American low-wing, cantilever two-seater designed for private and club use. A large anticipated production run in 1930 ended early when the company collapsed in the Great Depression, with only five or six registered. ...

Specifications

References

{{DEFAULTSORT:Leblond 5 Radial engines 1930s aircraft piston engines

Products

Applications

Specifications

See also

References