Form Object

Kinner "Sportster K"
Single-engine Two-seat Open Cockpit Light Monoplane.

Archive Photos 1

Kinner "Sportster K"

Overview 2

  • Role: Light monoplane
  • Manufacturer: Kinner Airplane & Motor Corporation
  • First flight: 1932

The Kinner Sportster was a 1930s American light monoplane built by Kinner Airplane & Motor Corporation.

Design and Development 2

Prior to 1932, the Kinner Airplane & Motor Corporation was known only as an aero-engine manufacturer, and the five Kinner radial air-cooled engines of 100-hp, 125-hp, 160-hp, 210-hp and 300-hp were used very largely in the United States.

In 1932, the Kinner Airplane & Motor Corporation announced its entry into the aeroplane manufacturing field with a number of light commercial monoplanes, all built around Kinner engines. The range of aircraft included:

  • Two-seat open-cockpit monoplane (100-hp or 125-hp Kinner engine)
  • Two-seat convertible monoplane (160-hp Kinner engine)
  • Two cabin monoplanes, one seating two and the other four, the first with the 160-hp and the second with the 370-hp Kinner engine, and
  • Twin-engine, five-seven-passenger monoplane with two 370-hp Kinner engines.

Kinner became bankrupt in 1937 and rights to the Sportster were acquired by the Timm Aircraft Company.

Specifications and Performance Data (Kinner "Sportster") 2

  • Two-seat open cockpit light monoplane.
  • Low-wing folding monoplane.
  • Clark "Y" wing section.
  • Wings attached to short stubs built integral with the fuselage and braced to the top fuselage longerons by inverted Vee struts.
  • Wing structure consists of spruce spars and ribs, with fabric covering.
  • Wings fold Back along the fuselage and a positive lock holds them in flying position.
  • "Frise" type ailerons.
  • Rectangular structure of welded steel-tube, with fabric covering.
Tail Unit:
  • Normal monoplane type.
  • Welded steel-tube framework, covered with fabric.
  • Adjustable tail-plane.
  • Divided type.
  • Kinner oleo telescopic legs.
  • Full airwheels for landing gear and tail-wheel.
  • Independent wheel-brakes, which may be operated simultaneously or independently by either foot or hand controls.
  • Swivelling tail-wheel.
Power Plant:
  • One 100 or 125-hp Kinner K-5 or B-5 five-cylinder radial air-cooled engine, on hinged mounting which, by the removal of two bolts, may be swung to one side to give access to accessories.
  • Main fuel tank, of 21 U.S. gallons capacity, in fuselage.
  • Reserve fuel tank, of 2-1/2 U.S. gallons capacity, in fuselage, with control on instrument panel.
  • Oil tank, of 3 U.S. gallons capacity, in fuselage.
  • Open cockpit, seating two side-by-side, over wing.
  • Adjustable seats.
  • Complete dual controls.
  • Large luggage space in each wing-stub.
  • Special provision for carrying golf clubs, guns, fishing rods, etc.
  • Optional cockpit enclosure.
  • Span: 39 ft (11.9 m)
  • Length: 24 ft 2 in (7.36 m)
  • Height: 7 ft (3.23 m)
  • Wing area: 227 ft2 (21 m2)
Weights and Loadings (100-hp Kinner engine):
  • Weight empty: 1,218 lbs (553 kg)
  • Weight loaded: 1,875 lbs (851 kg)
  • Wing loading: 9.28 lbs/ft2 (45.28 kg/m2)
  • Power loading: 18.75 lbs/hp (8.5 kg/hp)
Weights and Loadings (125-hp Kinner engine):
  • Weight empty: 1,232 lbs (559 kg)
  • Weight loaded: 1,875 lbs (851 kg)
  • Wing loading: 8.9 lbs/ft2 (43.4 kg/m2 )
  • Power loading: 14.4 lbs/hp (6.5 kg/hp)
Performance (100-hp Kinner engine):
  • Maximum speed: 104 mph (166.4 km/h.)
  • Cruising speed: 90 mph (144 km/h.)
  • Landing speed: 40 mph (64 km/h)
  • Initial rate of climb: 800 ft/min (244 m/min)
  • Service ceiling: 14, 000 ft (4,270 m)
  • Cruising range: 340 Miles (544 km)
Performance (125-hp Kinner engine)
  • Maximum speed :112 mph (174 km/h.)
  • Cruising speed: 100 mph (160 km/h.)
  • Landing speed: 35 mph (56 km/h)
  • Initial rate of climb: 900 ft/min (274.5 m/min)
  • Service ceiling: 15,000 ft (4,575 m)
  • Cruising range: 400 miles (640 km)


  1. Photos, John Shupek, Copyright © 2009 Skytamer Images. ALL RIGHTS RESERVED
  2. Bridgman, Leonard (ed.), Jane's All The World's Aircraft 1936. London, Sampson Low, Marston & Company, Ltd., 1936. pp 288c