Kari-Keen 90 Sioux Coupe

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Sioux Coupe
Kari-Keen 90.jpg
Role Sport monoplane
National origin United States
Manufacturer Kari-Keen Aircraft Corp, Sioux Aircraft Corporation
Designer Swen Swanson
Produced 1929-1933
Number built 32
Unit cost
$3,365 in 1930

The Kari-Keen 90 Sioux coupe was a two-seat cabin monoplane.[1]


Kari-Keen was an automotive luggage producer that started in the growing aviation business in 1929. Production of the Sioux coupe began in 1929 and ended on 1 August 1933. The first model, the Kari-Keen 60 Sioux Coup, featured a 60 hp (45 kW) Veile M-5 engine. 22 aircraft were built without a type certificate. In 1930, six more model 90s were built with a type certificate. In 1931, the Sioux Aircraft Corporation bought the company assets, changing the name of the Kari-Keen 90 into the Sioux Coupe 90.[2]


The Kari-Keen 90 Sioux Coupe was designed by Swen Swanson and was a two-seat side-by-side high-wing monoplane with conventional landing gear. The wing was fully cantilevered, with skylights built in. The fuel tank sat above the pilot's head and was part of the leading edge. Ole Fahlin built all the propellers and test-flew the aircraft.[3]


Kari-Keen 60 Sioux coupe
Sioux Coupe 90
Lambert R-266 radial engine 90 hp.[4]
Sioux Coupe 90A
powered with a 90 hp Brownback Tiger[5]
Sioux Coupe 90B Junior
powered with a 90 hp Warner Scarab Junior - one built
Sioux Coupe 90C Senior
powered with a 110 hp Warner Scarab - one built [6]

Aircraft on display[edit]

A Kari-Keen Sioux Model 90B was displayed at the 1931 Detroit air show.[7] In 1977, A restored Kari-Keen 90B won Grand Champion antique at the 1977 EAA Oshkosh Airshow.[8] A Kari-Keen 90 Sioux Coupe is on display at the Iowa Aviation Museum [9] A Kari-Keen 90A Sioux Coupe is on display at the Sioux City Public Museum, last flown in 2004.[10]

Specifications (Kari-Keen 90-C Sioux coupe)[edit]

Data from FAA TCDS, Sport Aviation

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Wing area: 150 sq ft (14 m2)
  • Airfoil: Eieffel 385
  • Gross weight: 1,580 lb (717 kg)
  • Fuel capacity: 25 US gallons (95 l; 21 imp gal)
  • Powerplant: 1 × Warner Scarab Radial, 110 hp (82 kW)
  • Propellers: 2-bladed Ole Fahlin


  • Cruise speed: 66 kn; 122 km/h (76 mph)

See also[edit]

Aircraft of comparable role, configuration and era


  1. ^ Skyways. July 1999.  Missing or empty |title= (help)
  2. ^ Jack Cox (November 1977). "GRAND CHAMPION ANTIQUE". Sport Aviation. 
  3. ^ Jack Cox (November 1977). "GRAND CHAMPION ANTIQUE". Sport Aviation. 
  4. ^ "FAA TCDS" (PDF). Retrieved 30 October 2011. 
  5. ^ United States Bureau of Air Commerce. Air Commerce Bulletin, Volume 2. 
  6. ^ "FAA TCDS" (PDF). Retrieved 30 October 2011. 
  7. ^ Popular Aviation. June 1931.  Missing or empty |title= (help)
  8. ^ Jack Cox (November 1977). "GRAND CHAMPION ANTIQUE". Sport Aviation. 
  9. ^ "Iowa Aviation Museum". Retrieved 30 October 2011. 
  10. ^ Sioux City Journal. 28 March 2010.  Missing or empty |title= (help)

External links[edit]