Lycoming Engines

Lycoming Engines
IndustryAerospace industry
Founded1845; 179 years ago (1845)
FounderMadame Ellen Curtis Demorest
HeadquartersWilliamsport, Pennsylvania
Parent
Websitehttp://www.lycoming.com

Lycoming Engines is a major American manufacturer of aircraft engines. With a factory in Williamsport, Pennsylvania, Lycoming produces a line of horizontally opposed, air-cooled, four, six and eight-cylinder engines including the only FAA-certified aerobatic and helicopter piston engines on the market.

The company has built more than 325,000 piston aircraft engines and powers more than half the world's general aviation fleet, both rotary and fixed wing.[1]

Lycoming has been a principal pioneer of turbine engines for medium and large helicopters, and has also produced engines for small jetliners and business jets.[2][3][4]

Lycoming is an operating division of Avco Corporation, itself a subsidiary of Textron.[5][4][6]

History

Sewing machines, bicycles and fashion

Demorest Manufacturing Company Machine

Lycoming dates its founding to 1845 by "Madame Ellen Curtis Demorest".[7] However, the early history of the company (especially prior to 1860) is unclear;[8] biographer Ishbel Ross notes that the marriage of Ellen Louise Curtis to William Jennings Demorest took place in 1858, somewhat later than the purported date of establishment of the company.[8] A few years later in New York, between c. 1860 and 1887, the Demorests published fashion magazines and operated the Demorest Fashion and Sewing-Machine Company (sometimes known as the Demorest Manufacturing Company). They produced "Madame Demorest" and "Bartlett & Demorest" sewing machines and sold Ellen Demorest's innovative paper patterns for dressmaking.[8] During this period, Ellen Demorest patented several fashion accessories,[9][10] while her husband patented improvements to sewing machines[8] and an apparatus for the vulcanization of rubber.[11][12]

A Demorest print advertisement

Around 1883, Gerrit S. Scofield & Frank M. Scofield (advertising agents from New York) bought the Demorest brand and the sewing machine business (the Demorests retained the magazine business), and constructed a factory in Williamsport, Pennsylvania (in Lycoming County).[8][13] At the urging of the newly established Williamsport Board of Trade, citizens invested US$100, 000 in the new manufacturing facility, which employed 250 people.[8] The factory produced 50 to 60 sewing machines per day.[14] With the development of the "New York Bicycle" in 1891 (designed by employee S. H. Ellis), the company diversified its product offerings.[8][14] Until the early 1900s, the factory produced sewing machines, bicycles, typewriters, opera chairs and other products.[7][8][14]

Engine manufacture

By 1907, the manufacture of sewing machines had become unprofitable for Demorest, and the company was sold and restructured as the Lycoming Foundry and Machine Company, shifting its focus toward automobile engine manufacture.[7][8] In 1910, the company supplied its first automobile engine to Velie,[15] and during the early post-World-War-I era, the company was a major supplier to Auburn (which produced the Auburn, Cord, and Duesenberg lines).

By 1920, Lycoming was producing 60,000 engines a year, with a 2,000-strong workforce. To handle the capacity, a new foundry complex was built in Williamsport that year.[16] Eventually Lycoming became Auburn's principal supplier, and in 1927 Errett Lobban Cord bought the company,[15] placing it under his Auburn Manufacturing umbrella group.

Among the engines Lycoming produced for Cord was an L-head straight-eight engine of 298.5 cu. in. displacement that produced 125 horsepower. This was used in the Cord L-29. Lycoming also produced a double overhead cam straight 8 used in the legendary Duesenberg J series. This powerplant produced 265 horsepower, six times the power of a contemporary Model A Ford. A supercharged version, generating 325 horsepower, was installed in the Duesenberg SJ and SSJ models.

In 1929, Lycoming produced its first aviation engine, the nine-cylinder R-680 radial.[7] This was a fairly successful design, and was used widely in light aircraft, including Cord's Travel Air.

In the 1930s, Lycoming made a number of attempts to develop successful high-power aircraft engines. The 1 200 hp (895 kW) O-1230 was Lycoming's attempt to produce an engine based on the United States Army Air Corps hyper engine concept, and used a variety of features to produce nearly 1 hp/in3 (46 kW/L) of engine displacement. However, by the O-1230's entry into service, it had been surpassed by other designs and the US$500 000 investment was not recouped.

Another attempt was made to rescue the design by stacking two O-1230s to make the 2 300 hp (1 700 kW) H engine H-2470 but the only design to use it, the Vultee XP-54, never entered production. The Curtiss XF14C was originally intended to be powered by the H-2470, but the engine's poor performance led to the adoption of an alternative radial engine on the prototype. (The XF14C did not enter production.)

Undeterred by the O-1230/H-2470's failure, Lycoming turned to an even larger design, the 36-cylinder XR-7755, the largest aviation piston engine ever built. This design also experienced problems, and was only ready for use at the very end of World War II, when the aviation world was turning to turbojets and turboprop engines to power future large aircraft.[17] There was apparently some interest in using it on the Convair B-36 Peacemaker bomber, but the 28-cylinder Pratt & Whitney R-4360 Wasp Major four-bank radial was used instead.

Through the 1920s and -30s, Lycoming had still been supplying automotive manufacturers with engines. However, these clients each slowly went out of business or switched to Continental engines for their vehicles. By 1931, the company was supplying automotive engines to only three companies: Auburn, Cord and Duesenburg, still all under the control of Cord.[16] These companies closed their doors in 1937,[18] after which Lycoming switched to exclusively designing and producing engines for aviation.[16] In the meantime, the Smith Engineering Corporation, an early manufacturer of controllable pitch propellers had been purchased by Cord and moved to Williamsport.[19][20]

In 1939 Cord re-organized all of his aviation holdings into the AVCO group, at which point the engine manufacturing company became "AVCO Lycoming". It also leased the government-owned Stratford Army Engine Plant in Stratford, Connecticut, and produced Wright radials under license. After the war, this plant was converted to produce the T53 turboshaft engine, one of its more successful designs. From this point on the piston and turbine engine lines remained separate, with the piston lines being built in the original Williamsport factories, and turbines in Stratford.

By 1961, Lycoming produced 600 to 700 engines per month.[17] Its most successful post-war products were a series of air-cooled flat-4 and flat-6 general aviation engines. Most famous among these are the O-320 and O-360 four-cylinder engines, and the O-540 six-cylinder engine.[21][22] Many light aircraft are powered by versions of these engines, with power ratings in the 100–360 hp (75–270 kW) range. Engines in this series also include the O-235 four-, O-580 six- and O-720 eight-cylinder engines, and the advanced turbocharged and fuel-injected 450 hp (340 kW) TIGO-541 variant of the venerable (carbureted) O-540.

In the early 1980s, the general aviation market suddenly diminished and Lycoming's piston engine business was significantly impacted. Attempts were made to move some of the turbine production to Williamsport, but this led to a series of quality control problems and eventually it was abandoned.

Another attempt to rescue Williamsport was made in introducing the "radical" SCORE engine, a Wankel engine originally developed through a joint venture between Curtiss-Wright and John Deere. Curtiss-Wright lost interest in the design just as it was maturing and sold its interests in the project to Deere, which brought in Lycoming to sell the developed engine into the aviation markets. It was guaranteed a startup run by Cessna, also owned by Textron. Just as production was ready to start, Cessna announced it was halting its small-aircraft business for an indefinite period, and SCORE was cancelled. The remains of the Deere licenses were later purchased by Rotary Power International, which briefly produced a 340 hp (254 kW) version.

Textron purchased the company in 1985.[23] In 1994, Textron sold the Lycoming Turbine Engine Division, located in Stratford, Connecticut, to AlliedSignal, who merged it with the Garrett Engine Division of AlliedSignal as part of AlliedSignal Aerospace, later becoming part of Honeywell Aerospace in 1999.[24] Textron retained piston engine production in Williamsport.

Lycomings continue to power new light aircraft by fellow Textron division, Cessna Aircraft,[25] and by Piper,[26] Cirrus,[27] Diamond,[28] and others. Lycomings remain the most popular line of engines for U.S. Experimental / Amateur-Built (E/A-B) aircraft, surpassing the 5 next-most-popular brands, combined.[29]

Products

The aircraft piston engine prefixes are:[30][failed verification]

  • A—Aerobatic (dry sump)
  • AE—Aerobatic (wet sump)[31]
  • E—Electronic
  • G—Geared (reduction gear)
  • H—Helicopter
  • I—Fuel injected
  • L—Left hand rotation crankshaft
  • M—Designed for unmanned drone
  • O—Opposed cylinders
  • R—Radial cylinders
  • S—Supercharged
  • T—Turbocharged
  • V—Vertical installation (usually for helicopters)
  • X—X-type engine
  • Y—Experimental

Piston engines

O-145-B2
AEIO-540-D4A5
R-680
Model name Configuration Power
Lycoming DEL-120 205 hp
Lycoming O-145 O4 55 hp
Lycoming IO-233 O4 100 hp
Lycoming O-235 O4 100 hp
Lycoming O-290 O4 140 hp
Lycoming O-320 O4 150 hp
Lycoming O-340 O4 170 hp
Lycoming O-360 O4 180 hp
Lycoming IO-360 O4 200 hp
Lycoming IO-390 O4 210 hp
Lycoming O-435 O6 212 hp
Lycoming O-480 O6 340 hp
Lycoming O-540 O6 300 hp
Lycoming TIO-541 O6 310 hp
Lycoming IO-580 O6 300 hp
Lycoming GSO-580 O8 400 hp
Lycoming R-680 R9 330 hp
Lycoming IO-720 O8 400 hp
Lycoming O-1230 O12 1000 hp
Lycoming H-2470 H24 2,300 hp
Lycoming XR-7755 IR36 5,000 hp

Turbine engines

T55-K-712

Lycoming was one of the principal pioneers of turbine engines -- turboshaft to be precise—for medium- and heavy-lift helicopters, some of which have found other applications as well. Its 1,400 horsepower (1,000 kW) T53 hybrid free turbine / shaft turbine engine initially powered the Bell UH-1 "Huey", and Lycoming's 4,000 horsepower (3,000 kW) T55 is the main power for the twin-turbine, twin-rotor Boeing CH-47 Chinook. Lycoming turbines have powered other helicopters, also.[2][3][4][32]

Variants and derivatives have powered various turboprop and turbofan aircraft, as well, including the OV-1 Mohawk military aircraft, BAe 146 jetliner, Canadair Challenger business jet, and others.[2][3][4][32]

Model name Configuration Power
Lycoming T53 Turboshaft 1,451 hp
Lycoming T55 Turboshaft 4,867 hp
Lycoming PLF1
Lycoming LTS101/LPT101 Turboshaft/Turboprop 675 hp
Lycoming ALF 502 Turbofan 6,700 lbf
Lycoming AGT1500 Gas turbine 1,500 hp
Lycoming TF-40 Gas turbine 4,000 hp[33]

See also

References

Notes

  1. ^ "History: Decades of Pioneering Spirit", official website of Lycoming Engines, retrieved August 9, 2023
  2. ^ a b c Angelucci, Enzo: Airplanes: From the Dawn of Flight to the Present Day, 1982 ed., Greenwich House / Arlington House, U.K.; retrieved August 8, 2023.
  3. ^ a b c Young, Warren R., et.al.: The Helicopters, 1982, from the "Epic of Flight" series, Time-Life Books, Alexandria, Virginia, USA (cross-referenced with Angelucci's book)
  4. ^ a b c d Lambert, Mark, ed.: "Textron Lycoming" in "USA: Engines", Jane's All the World's Aircraft 1994–1995, 1994, pp. 756 et. seq., Jane's, Sentinel House, Surrey, UK/ Alexandria, Virginia, US; ISBN 0-7106-1160-9
  5. ^ Wragg, David W. (1973). A Dictionary of Aviation (first ed.). Osprey. p. 45. ISBN 9780850451634.
  6. ^ Textron Legal Entity
  7. ^ a b c d "History". Lycoming Engines. 2017. Retrieved August 16, 2017.
  8. ^ a b c d e f g h i Kelly (November 2006). "Demorest Sewing Machine Company History". kelsew.info. Archived from the original on June 14, 2009. Retrieved December 30, 2008.
  9. ^ US 87648, Demorest, E. L. & Cook, W. G., "Brace and Suspender Combined", published 1869-03-05 
  10. ^ US 264935, Demorest, E. L., "Puff for Head-Dresses", published 1882-03-09 
  11. ^ US 23948, Roberts, Edward A. L. & Demorest, William J., "Apparatus for Vulcanizing Rubber", published 1859-05-10 
  12. ^ US RE 1444, Roberts, Edward A. L. & Demorest, William J., "Improvement in Apparatus for Vulcanizing Rubber, &c.", published 1863-03-31 
  13. ^ "Names Obtained by Fraud". New York Times. November 4, 1888. p. 9. ISSN 0362-4331. Retrieved December 30, 2008.
  14. ^ a b c Kevin McQuown. "Lycoming County's Old Days". Williamsport Area High School Website. Williamsport Area School District. Archived from the original on July 9, 2015. Retrieved December 30, 2008.
  15. ^ a b "The Lycoming Museum" (PDF). Lycoming. Archived from the original (PDF) on February 13, 2012. Retrieved October 25, 2020.
  16. ^ a b c Hemmings.com. "Sewing Machines to Straight-Eights | Hemmings Motor News". www.hemmings.com. Retrieved August 12, 2016.
  17. ^ a b Richard Bach (December 1961). "Lycomings Piston Engines". Flying Magazine.
  18. ^ "ACD Co. Story". AUBURN-CORD-DUESENBERG CO. Archived from the original on August 17, 2016. Retrieved August 12, 2016.
  19. ^ "Cord Buys Smith Company". Aero Digest. Vol. 23, no. 4. October 1933. p. 56. Retrieved July 30, 2021.
  20. ^ "Lycoming to Manufacture Props". Aero Digest. Vol. 23, no. 4. October 1933. p. 54. Retrieved July 30, 2021.
  21. ^ "50 Amazing Aircraft Engines," March 15, 2014, Flying, retrieved August 8, 2023
  22. ^ Wilson, Tom: 2013 Engine Buyer’s Guide: "Part 1: Traditional powerplants," February 14, 2013, Kitplanes, retrieved August 8, 2023
  23. ^ "History | Textron". www.textron.com. Retrieved August 12, 2016.
  24. ^ Leyes, p. 725
  25. ^ "Single-Engine Aircraft" on "Cessna" page, Cessna, retrieved June 29, 2023
  26. ^ "Models", Piper, retrieved June 29, 2023
  27. ^ "Built for Flight Training," Cirrus Aircraft, retrieved June 29, 2023
  28. ^ "Why Diamond", Diamond Aircraft, retrieved June 29, 2023
  29. ^ Wanttaja, Ron: "Homebuilt Accidents: Passing the Engine Baton," December 19, 2022, Kitplanes, retrieved June 29, 2023
  30. ^ "360 Series" (PDF). Lycoming. 2004. Archived from the original (PDF) on November 26, 2010. Retrieved September 13, 2021.
  31. ^ "Aerobatic engines" (PDF). Archived from the original (PDF) on December 6, 2010. Retrieved March 19, 2011.
  32. ^ a b John W. R. Taylor, ed.: "AVCO Lycoming" in "USA: Engines", Jane's All the World's Aircraft 1966-1967, 1967, pp.517 et. seq., Jane's, Bucks, England, U.K. / McGraw-Hill, New York, USA
  33. ^ "TF40". Vericor. Retrieved September 13, 2021.

Bibliography

  • Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.
  • Leyes II, Richard A.; William A. Fleming (1999). "10". The History of North American Small Gas Turbine Aircraft Engines. Washington, DC: Smithsonian Institution. p. 725. ISBN 1-56347-332-1.
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