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Lycoming O-145
The Lycoming O-145 is a family of small, low horsepower, four cylinder, air-cooled horizontally opposed aircraft engine produced from 1938 until the late 1940s. The family includes the reduction-geared GO-145.[1][2][3]
Contents
Design and development
The O-145 was produced in three major versions, the -A rated at Template:Convert, the -B rated at Template:Convert, and -C rated at Template:Convert. 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 Template:Convert at 2300 rpm, weighed Template:Convert and featured single ignition. In an attempt to compete with the Continental A-65 Lycoming boosted the rpm and power output to Template:Convert at 2550 rpm and finally Template:Convert 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 Template:Convert 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 Template:Convert 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][4][3]
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, Template:Convert, single ignition[2]
- 0-145-A3
- Four cylinder, direct drive, Template:Convert, single ignition, with starter and generator installed[3]
- O-145-B1
- Four cylinder, direct drive, Template:Convert, single ignition[1]
- O-145-B2
- Four cylinder, direct drive, Template:Convert, dual ignition[1]
- O-145-B3
- Four cylinder, direct drive, Template:Convert, dual ignition[1]
- O-145-C1
- Four cylinder, direct drive, Template:Convert, single ignition[1]
- O-145-C2
- Four cylinder, direct drive, Template:Convert, dual ignition[1]
- GO-145-C1
- Four cylinder, reduction gearbox, Template:Convert, single ignition[1]
- GO-145-C2
- Four cylinder, reduction gearbox, Template:Convert, dual ignition[1]
- GO-145-C3
- Four cylinder, reduction gearbox, Template:Convert, dual ignition[1]
Applications
- GO-145
Specifications (GO-145-C2)
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References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 Federal Aviation Administration (August 1949). Approved Type Certificate 210. Retrieved on 2008-12-21.
- ↑ 2.0 2.1 2.2 2.3 2.4 Christy, Joe: Engines for Homebuilt Aircraft & Ultralights, pages 64-65 TAB Books, 1983. ISBN 0-8306-2347-7
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Boggs, Jerry (undated). Super KR-1. Retrieved on 2008-12-21.
- ↑ Rotor & Wing (January 2005). Lycoming Engines. Retrieved on 2008-12-21.
External links
Template:Lycoming aeroengines Template:US military piston aeroengines
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
| This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lycoming O-145". |
