Franklin O-350

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.

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

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.

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

• Bushcaddy L-164
• Cessna 170
• Cessna 172
• Cessna 175
• Hirth Acrostar
• Jovair Sedan
• Kaiser Magic
• Maule M-4
• Maule M-5
• Procaer Picchio
• PZL M-20 Mewa
• Rallye Commodore
• SIAI-Marchetti S.205
• SIAI-Marchetti SH-4
• Stinson 108
• Van's RV-8
• Zenith STOL CH 801

Specifications (6A-350)

Data from

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

See also

Comparable engines

• Continental IO-360

Related lists

• List of aircraft engines

References

Notes

Bibliography

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