The Lycoming O-145 is a family of small, low-horsepower, four-cylinder, air-cooled engines. It was Lycoming Engines' first horizontally opposed aircraft engine and was produced from 1938 until the late 1940s. The family includes the reduction-geared GO-145.[1][2][3] The O-145 received its Approved Type Certificate on 13 Jun 1938.
The O-145 was produced in three major versions, the O-145-A rated at 55 hp (41 kW), the -B rated at 65 hp (48 kW), and -C rated at 75 hp (56 kW). The "B" model was the major production model, with the "A" and "C" produced in much smaller quantities.[1][2]
All models of the series had the same bore, stroke, and displacement, additional horsepower being generated by increasing compression ratio and maximum rpm. All use a Stromberg NA-S2 or NA-S2A or Marvel MA-2 or MA-2-A carburetor. The dual ignition versions use two Scintilla SF-4L, SN4LN-20 or -21, Superior SMA-4 or Edison-Splitdorf RMA-4 magnetos.[1][2]
The original O-145-A produced 55 hp (41 kW) at 2300 rpm, weighed 165.5 lb (75 kg), and featured single ignition. In an attempt to compete with the Continental A-65, Lycoming boosted the rpm and power output to 65 hp (48 kW) at 2550 rpm, and finally 75 hp (56 kW) at 3100 rpm. The O-145 had a hard time competing with the same horsepower Continentals due to its smaller displacement, which resulted in a steeper torque curve.[1][3]
The GO-145 is a geared model, introduced in 1938, that uses a 27:17 reduction ratio (1.59:1) gearbox to produce 75 hp (56 kW) at 3200 crankshaft rpm, giving 2013 propeller rpm. The engine employs a gearbox bolted to the front of the engine and the resulting engine weighs 193 lb (88 kg) without starter or generator. The GO-145 suffered from a poor reputation for reliability, because pilots mis-handled the engine, running it at too low a cruising rpm and causing gearbox wear as a result.[1][2][3][4]
The series' type certificate expired on 2 November 1950 and no O-145-B1 or -C1 or GO-145-C1s engines produced after 1 August 1941 and O-145-B2, -B3 or -C2, or GO-145-C2 or -C3s produced after 24 August 1949 are eligible for certification. The single ignition O-145-A series, O-145-B1, and -C1 are not covered by the original type certificate.[1]
Lycoming ended production of the O-145 and replaced it with the O-235 series.[3]
Variants
O-145-A
Four-cylinder, direct drive, 55 hp (41 kW), single ignition[2]
O-145-A3
Four-cylinder, direct drive, 55 hp (41 kW), single ignition, with starter and generator installed[3]
^ abcdefghiBoggs, Jerry (n.d.). "Super KR-1". Retrieved 2008-12-21.
^Rotor & Wing (January 2005). . Archived from the original on 2009-04-14. Retrieved 2008-12-21.
March 08, 2023
lycoming, family, small, horsepower, four, cylinder, cooled, engines, lycoming, engines, first, horizontally, opposed, aircraft, engine, produced, from, 1938, until, late, 1940s, family, includes, reduction, geared, received, approved, type, certificate, 1938,. The Lycoming O 145 is a family of small low horsepower four cylinder air cooled engines It was Lycoming Engines first horizontally opposed aircraft engine and was produced from 1938 until the late 1940s The family includes the reduction geared GO 145 1 2 3 The O 145 received its Approved Type Certificate on 13 Jun 1938 O 145Preserved Lycoming O 145Type Piston aero engineNational origin United StatesManufacturer Lycoming EnginesFirst run 1933Major applications Piper J 3 Cub Piper J 5 Piper PA 15 Vagabond Aeronca Chief familyProduced 1938 1949Developed into Lycoming O 233 Lycoming O 235 Contents 1 Design and development 2 Variants 3 Applications 4 Specifications GO 145 C2 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 ReferencesDesign and development EditThe O 145 was produced in three major versions the O 145 A rated at 55 hp 41 kW the B rated at 65 hp 48 kW and C rated at 75 hp 56 kW The B model was the major production model with the A and C produced in much smaller quantities 1 2 All models of the series had the same bore stroke and displacement additional horsepower being generated by increasing compression ratio and maximum rpm All use a Stromberg NA S2 or NA S2A or Marvel MA 2 or MA 2 A carburetor The dual ignition versions use two Scintilla SF 4L SN4LN 20 or 21 Superior SMA 4 or Edison Splitdorf RMA 4 magnetos 1 2 The original O 145 A produced 55 hp 41 kW at 2300 rpm weighed 165 5 lb 75 kg and featured single ignition In an attempt to compete with the Continental A 65 Lycoming boosted the rpm and power output to 65 hp 48 kW at 2550 rpm and finally 75 hp 56 kW at 3100 rpm The O 145 had a hard time competing with the same horsepower Continentals due to its smaller displacement which resulted in a steeper torque curve 1 3 The GO 145 is a geared model introduced in 1938 that uses a 27 17 reduction ratio 1 59 1 gearbox to produce 75 hp 56 kW at 3200 crankshaft rpm giving 2013 propeller rpm The engine employs a gearbox bolted to the front of the engine and the resulting engine weighs 193 lb 88 kg without starter or generator The GO 145 suffered from a poor reputation for reliability because pilots mis handled the engine running it at too low a cruising rpm and causing gearbox wear as a result 1 2 3 4 The series type certificate expired on 2 November 1950 and no O 145 B1 or C1 or GO 145 C1s engines produced after 1 August 1941 and O 145 B2 B3 or C2 or GO 145 C2 or C3s produced after 24 August 1949 are eligible for certification The single ignition O 145 A series O 145 B1 and C1 are not covered by the original type certificate 1 Lycoming ended production of the O 145 and replaced it with the O 235 series 3 Variants EditO 145 A Four cylinder direct drive 55 hp 41 kW single ignition 2 O 145 A3 Four cylinder direct drive 55 hp 41 kW single ignition with starter and generator installed 3 O 145 B on display at the Air Zoo O 145 B1 Four cylinder direct drive 65 hp 48 kW at 2550 rpm single ignition 155 lb 1 O 145 B2 Four cylinder direct drive 65 hp 48 kW at 2550 rpm dual ignition 166 lb 1 O 145 B3 Four cylinder direct drive 65 hp 48 kW at 2550 rpm dual ignition 169 lb 1 O 145 C1 Four cylinder direct drive 75 hp 56 kW at 3100 rpm single ignition 155 lb 1 O 145 C2 Four cylinder direct drive 75 hp 56 kW at 3100 rpm dual ignition 166 lb 1 GO 145 C1 Four cylinder reduction gearbox 75 hp 56 kW at 3200 rpm single ignition 182 lb 1 GO 145 C2 Four cylinder reduction gearbox 75 hp 56 kW at 3200 rpm dual ignition 193 lb 1 GO 145 C3 Four cylinder reduction gearbox 75 hp 56 kW at 3200 rpm dual ignition 195 lb 1 Applications EditO 145Aeronca Chief 50L 50LA 65LA Aeronca Super Chief 65LB Aeronca Tandem 50TL 60TL 65TL Airdrome Fokker D VIII Luscombe 8B Mooney Mite M 18L Piper J 3L Cub most often the 65 hp version Piper J 4F Cub Coupe Piper PA 8 Skycycle Carlson Skycycle Piper PA 15 Vagabond Porterfield Collegiate LP 50 LP 55 LP 65 Taylorcraft BL series BL 50 BL 65 BL 12 65 etc Taylorcraft DL Taylorcraft Plus CGO 145Piper J 5B Cub Cruiser 3 Funk B75L 3 General Skyfarer 3 Rich Twin 1 X 2 3 Shirlen Big Cootie Stinson 10B VoyagerSpecifications GO 145 C2 EditData from Type Certificate 210 1 General characteristics Type Four cylinder reduction geared engine Bore 3 625 in 92 mm Stroke 3 500 in 89 mm Displacement 144 5 in 2 4 L Dry weight 193 lb 87 5 kg Components Fuel system Stromberg NA S2 or NA S2A or Marvel MA 2 or MA 2 A carburetor Fuel type minimum 73 octane Cooling system air cooledPerformance Power output 75 hp at 3200 rpm 56 kW Specific power 0 52 hp in 23 3 kW L Compression ratio 6 5 1 Power to weight ratio 0 39 hp lb 0 64 kW kg See also EditComparable engines Continental O 170 Franklin O 150Related lists List of aircraft enginesReferences Edit Wikimedia Commons has media related to Lycoming O 145 a b c d e f g h i j k l m n o Federal Aviation Administration August 1949 Approved Type Certificate 210 Retrieved 2008 12 21 a b c d e Christy Joe Engines for Homebuilt Aircraft amp Ultralights pages 64 65 TAB Books 1983 ISBN 0 8306 2347 7 a b c d e f g h i Boggs Jerry n d Super KR 1 Retrieved 2008 12 21 Rotor amp Wing January 2005 Lycoming Engines Archived from the original on 2009 04 14 Retrieved 2008 12 21 Retrieved from https en wikipedia org w index php title Lycoming O 145 amp oldid 1056215377, wikipedia, wiki, book, books, library,
