FORBES FIELD, TOPEKA, KANSAS 

Kinner R-55 (Military R-540-1)
Five Cylinder, Air-cooled, Radial
Kinner Motors Inc, Glendale, CA

General Characteristics:
Bore: 5 in (127 mm)
Stroke: 5 1⁄2 in (139.7 mm)
Displacement: 540cu in (8.85 L)
Length: 32.3in (820.4 mm)
Height: 45.6in (1,157 mm)
Dry Weight: 330lb (149.6 kg)
Power Output: 160hp at 1,850 RPM max
113hp at 1,800 RPM cruise
Compression Ratio: 5.50:1
Power-to-Weight ration: 0.48 hp/lb

Applications:
Ryan ST/ PT-22 Recruit (military/civilian trainer)
Meyers OTW (military/civilian trainer)

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