Continental O-300
The Continental O-300 and the C145 are a family of air-cooled flat-6 aircraft piston engines built by Teledyne Continental Motors.[1]
First produced in 1947, versions were still in production as of 2004. It was produced under licence in the United Kingdom by Rolls-Royce in the 1960s.
Development
Continental O-300 engine installation in a
Cessna 172
The C-145 was developed from the 125 hp (93 kW) C125 engine. Both powerplants share the same crankcase, although the C145 produces an additional 20 hp (15 kW) through a longer piston stroke, higher compression ratio of 7.0:1 and different carburetor jetting.[1]
The O-300 is a modernized C145 and retains the same weight, dimensions, bore, stroke, compression ratio, displacement and output power of the earlier engine.[1]
GO-300
The GO-300 employs a reduction gearbox, so that the engine turns at 3200 rpm to produce a propeller rpm of 2400. The GO-300 produces 175 hp (130 kW) whereas the ungeared O-300 produces 145 hp (108 kW).[1]
The GO-300 engine has a TBO (Time Between Overhaul) of only 1200 hours, while 1800 hours is the standard for ungeared O-300 engines. The GO-300 engine also suffered reliability problems as a result of pilots mishandling the engine and operating it at too low an engine rpm. This caused the Cessna Skylark to develop a poor reputation for engine reliability. Many Skylarks flying today have been converted to different larger displacement direct drive engines.[2]
Variants
- C145
- Six-cylinder, 145 hp (108 kW), direct-drive engine.[1]
- C145-2
- O-300
- Modernized C145, 145 hp (108 kW), direct drive engine.[1]
- O-300-A
- O-300-B
- O-300-C
- O-300-D
- O-300-E
- Limited production for the Beagle B.218X twin that never went into production
- GO-300
- Geared O-300, 175 hp (130 kW) at 3200 crankshaft rpm, 2400 propeller rpm.[1]
- GO-300-A
- GO-300-C
- GO-300-D
- Voyager 300
- Liquid-cooled, fuel-injected version developing 170 hp (127 kW) at 2,700 rpm.
- Rolls-Royce-Continental O-300
- Licence production in the United Kingdom.
Applications
Cessna 175 showing the cowling bulge behind the propeller hub created by the GO-300 reduction gearbox
O-300
GO-300
- Cessna 175
- Goodyear GZ-19 and GZ-19A
Voyager 300
Specifications (O-300)
Reference: Engines for Homebuilt Aircraft & Ultralights[1]
General characteristics
- Type: 6-cylinder air-cooled horizontally opposed aircraft piston engine
- Bore: 4.0625 in (103.2 mm)
- Stroke: 3.875 in (98.4 mm)
- Displacement: 301.4 in³ (4.94 L)
- Length: 39.75 in (101.0 cm)
- Width: 31.5 in (80.0 cm)
- Height: 23.25 in (59.0 cm)
- Dry weight: 268 lbs (121.5 kg) dry, without starter or generator
Components
- Cooling system: Air-cooled
Performance
See also
- Related lists
References
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