Franklin O-350

O-350/6A-350
Type	Piston aircraft engine
National origin	United States
Manufacturer	Franklin Engine Company/WSK-PZL
First run	1964
Developed from	Franklin O-335

The Franklin O-350 (company designation 6A-350) was an American air-cooled aircraft engine of the 1960s. The engine was of six-cylinder, horizontally-opposed layout and displaced 350 cu in (6 L). The power output was 235 hp (175 kW). The 6V-350 was a vertically mounted, fan cooled version for helicopters.

Variants

6A-350: 235 hp (175 kW) at 3,200 rpm

6A-350C1: 220 hp (164 kW) at 2,800 rpm
6A-350C1R: 205 hp (153 kW) at 2,800 rpm
6A-350C1L: 205 hp (153 kW) at 2,800 rpm
6A-350C2: 215 hp (160 kW) at 2,800 rpm; The C2 is the same as C1, except for the induction system piping. When a Marvel Schebler MA4-5 carburetor is used on the 6A-350-C1 engine for improved acceleration the takeoff and max. continuous rating are 215 hp (160 kW) at 2,800 rpm.^[1]^[2]

6AS-350: Turbocharged, 235 hp (175 kW) at 2,800 rpm.

6V-350: Vertically mounted, fan-cooled helicopter version, 235 hp (175 kW) at 3,200 rpm

Applications

Specifications (6A-350)

Data from ^{[citation needed]}

General characteristics

Type: 6-cylinder air-cooled horizontally opposed aircraft piston engine
Bore: 4.625 in (117.5 mm)
Stroke: 3.5 in (88.9 mm)
Displacement: 352.8 in³ (5.78 L)
Dry weight: 307 lb (139 kg)

Components

Cooling system: Air-cooled

Performance

Power output: 235 hp (175 kW) at 3,200 rpm

References

Notes

Bibliography

Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57

[1] ttps://www.easa.europa.eu/en/document-library/type-certificates/engine-cs-e/easae088-franklin-6a-350-series-engines

[2] ttps://drs.faa.gov/browse/excelExternalWindow/E4BE5ADABA76F70186257BA60052D994.0001

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