Kinner R-5

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The Kinner R-5 was a popular engine for light general and sport aircraft. The R-5 was a development of the earlier B-5 with slightly greater power and dimensions. The main change was the increase in cylinder bore from 117mm (4.625in) to 127mm (5in) and an increase in cylinder stroke from 133.3mm (5.25in) to 139.7mm (5.5in). This led to a corresponding increase in displacement from 7.2 liters (441 cu in) to 8.8 liters (540 cu in). The R-5 was a rough running but reliable engine and the R-5 and its derivatives were produced in the 1,000s, powering many World War II trainer aircraft, its military designation R-540.

[edit] Specifications (Kinner R-5)

General characteristics

• Type: 5-cylinder air cooled radial
• Bore: 127mm (5in)
• Stroke: 139.7mm (5.5in)
• Displacement: 8.8 Liters (540cu in)
• Length: 820.4mm (32.3in)
• Height: 1,157mm (45.6in)
• Dry weight: 149.6kg (330lb)

Components

• Valvetrain: 1 inlet and 1 exhaust valve per cylinder
• Fuel system: 1 stromberg carburetor
• Fuel type: 73 octane
• Cooling system: Air

Performance

• Power output: 160hp @ 1,850 RPM max/113hp @ 1,800 RPM cruise
• Compression ratio: 5.50:1
• Power-to-weight ratio: 2.92lb/hp @ cruise

[edit] Applications

• Kinner Sportwing
• Kinner Playboy
• Meyers OTW
• N2T Tutor
• Ryan PT-22 Recruit

[edit] References

• http://www.oldengine.org/members/diesel/Duxford/usaero4.htm
• Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens, 99-100. 

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