Kinner R-5

R-5

Kinner R-56 installed in a PT-22 Recruit
Type	Radial engine
Manufacturer	Kinner Airplane & Motor Corporation
Developed from	Kinner B-5
Developed into	Kinner C-5

The Kinner R-5 is an American five cylinder radial engine for light general and sport aircraft of the 1930s.

Design and development

The R-5 was a development of the earlier Kinner B-5, with slightly greater power and dimensions. The main change was the increase in cylinder bore from 117 mm (4.625 in) to 127 mm (5 in) and an increase in piston stroke from 133.3 mm (5.25 in) to 139.7 mm (5.5 in). 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. Thousands of the R-5 and its derivatives were produced, powering many World War II trainer aircraft. Its military designation was R-540.

Applications

Cam Harrod starts his 160 hp Kinner powered Finch Model R

Variants

R-5
R-53
R-55
R-56

Specifications (Kinner R-5)

General characteristics

Type: 5-cylinder air cooled radial
Bore: 5 in (127 mm)
Stroke: 5 ¹⁄₂in (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)

Components

Valvetrain: 1 inlet and 1 exhaust valve per cylinder
Fuel system: 1 Stromberg carburetor
Fuel type: 73 octane
Oil system: Dry sump
Cooling system: Air

Performance

Power output: 160hp at 1,850 RPM max/113hp at 1,800 RPM cruise
Compression ratio: 5.50:1
Power-to-weight ratio: 0.48 hp/lb

References

Wikimedia Commons has media related to Kinner R-5.

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

Kinner aero engines

Radial engines	B-5 B-54 C-5 C-7 K-5 R-5 R-53 R-56

Horizontally opposed engines	O-552

United States military piston aircraft engine designation system

H (four-bank H-configuration inline)	H-1640 XH-2240 H-2470 XH-2600 XH-3130 XH-3730 H-4070

I (inverted-V inline)	IV-1430 IV-2040 IV-2220

L (single-bank inline)	L-330 L-365 L-375 L-390 L-410 L-440 L-510 L-825

O (opposed)	O-15 O-40 O-45 O-90 O-100 O-145 O-150 O-170 O-175 O-180 O-190 O-200 (C) O-200 (F) O-205 O-235 O-290 O-300 O-335 O-360 (C) O-360 (L) O-405 O-425 O-435 O-470 O-480 O-520 O-540 (F) O-540 (L) O-550 O-580 O-805 O-1230

R (radial)	R-250 R-265 R-270 R-370 (LB) R-370 (K) R-420 R-440 R-500 R-540 (W) R-540 (K) R-545 R-550 R-600 R-670 R-680 R-720 R-755 R-760 R-790 R-830 R-915 R-975 DR-980 R-985 R-1044 R-1300 R-1340 R-1454 R-1510 R-1535 R-1640 R-1670 R-1690 R-1750 R-1820 R-1830 R-1860 R-2000 R-2060 R-2160 R-2180 R-2600 R-2800 R-3350 R-4090 R-4360 XR-7755

V (upright-V inline)	V-720 V-770 V-1150 V-1237 V-1400 V-1410 V-1440 V-1460 V-1510 V-1560 V-1570 V-1650 (L) V-1650 (P) V-1710 V-1950 V-3420

W (three-bank W-configuration inline)	W-2779

See also: X-1800 US military gas turbine aeroengines Piston engine configurations

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