Kinner K-5
# Kinner K-5

The Kinner K-5 was a popular engine for light general and sport aircraft developed by Winfield B. 'Bert' Kinner. With the boom in civilian aviation after Charles Lindbergh's transatlantic flight the K-5 sold well. The K-5 was a rough running but reliable engine and the K-5 and its derivatives were produced in the thousands, powering many World War II trainer aircraft. The K-5 was followed by the B-5, R-5 and R-55. Military engines were designated R-370

## Applications

* Adcox Special
* American Eagle A-129 biplane
* Chamberlin C-2
* Davis D-1-K
* Fleet Model 2
* Granville Brothers Model A biplane
* Kinner Sportster
* Kreutzer Air Coach
* Simplex C-2 Red Arrow
* Sullivan Model K-3 Crested Harpy
* Waco KSO

## Specifications (Kinner K-5)

Data from Jane's all the World's Aircraft 1928

### General characteristics

* Type: Five-cylinder, air-cooled, radial
* Bore: 4.25 in (108 mm)
* Displacement: 372.4 cu in (6.103 L)
* Length: 19 in (480 mm)
* Diameter: 43.5 in (1,100 mm)
* Dry weight: 231 lb (105 kg)

### Components

* Valvetrain: 1 inlet and 1 exhaust valve per cylinder
* Fuel system: 1 Stromberg carburetor or 1 double Zenith carburetor
* Fuel type: 73 Octane
* Oil system: pressure fed through hollow crankshaft
* Cooling system: Air

### Performance

* Power output:
   * 100 hp (75 kW) at 1,810 rpm maximum
   * 70 hp (52 kW) at 1,650 rpm cruise
* Compression ratio: 5.0:1
* Fuel consumption: 7 gal/h (5.8 imp gal/h; 26 L/h)
* Oil consumption: 0.3125 gal/h (0.2602 imp gal/h; 1.183 L/h)
* Power-to-weight ratio: 0.36 hp/lb (0.59 kW/kg) at cruise
