O-526
The sole Cessna 620, powered by Continental GSO-526A engines
Type	Piston aircraft engine
National origin	USA
Manufacturer	Continental Motors
Major applications	Cessna 620
Produced	1957

The Continental O-526 is a family of air-cooled flat-6 aircraft piston engines built by Teledyne Continental Motors.^[1]

Development

Constructiuonally similar to the O-470 series the O-526 has larger cylinders of increased bore and stroke, giving a displacement of 526 cu in (8,620 cc). The O-526 was introduced with reduction gearing and a supercharger as the GSO-526 for the Cessna 620

Specifications (GSO-526)

Data from Jane's all the World's Aircraft 1955-56.^[1]

General characteristics

• Type: 6-cylinder air-cooled horizontally opposed aircraft piston engine
• Bore: 5.125 in (130.2 mm)
• Stroke: 4.25 in (108 mm)
• Displacement: 526 cu in (8.62 L)
• Length: 52.8 in (1,340 mm)
• Width: 36 in (910 mm)
• Height: 23.9 in (610 mm)
• Dry weight: 540 lb (240 kg)dry

Components

• Fuel type: 91/96 Octane
• Cooling system: Air-cooled

Performance

• Power output: 320 hp (240 kW) at 3,000 rpm for take-off
• Specific power: 0.58 hp/in³ (26.5 kW/L)
• Compression ratio: 6.0:1
• Power-to-weight ratio: 0.593 hp/lb (0.97 kW/kg)