Stits SA-2A Sky Baby

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SA-2A Sky Baby
300px
Sky Baby on display
Role Homebuilt aircraft
National origin United States
Designer Ray Stits
First flight 26 May 1952
Number built 1
Unit cost
$2,500 in 1952

The Stits SA-2A Sky Baby was a homebuilt aircraft designed for the challenge of claiming the title of "The World's Smallest".[1]

Design and development

The Sky Baby was designed by Ray Stits and built with Bob Starr as a follow-on to the Stits Junior midget racer. The aircraft is an enclosed single engine negative staggered cantilevered biplane with conventional landing gear. The fuselage is constructed of welded steel tubing with aircraft fabric covering. The upper wings have flaps, the lower wings have ailerons. Most aircraft use a flat firewall between the engine and pilot's feet, the Skybaby is configured with the pilot sitting with the engine close to the lap, and rudder pedals located under the oil sump toward the front of the cowling.[2] The powerplant was a sourced from an ERCO Ercoupe, modified with water injection to produce 112 hp (84 kW).[3]

Operational history

The aircraft was test flown by Bob Starr on 26 May 1952 at Palm Springs, California. The short coupled aircraft was originally built with tricycle landing gear, which was dropped in favor of the lighter tailwheel arrangement. The aircraft required a 170 lb (77 kg) pilot to remain within the center of gravity and was only flown by pilots Starr and Lester Cole that met the criteria. The landing procedure uses 125 mph (201 km/h) entry patterns, with 80 mph (129 km/h) on final approach, and 55 mph (89 km/h) touchdown speeds. The aircraft performed publicity flights to promote an airshow act. It was retired in October 1952 after 25 hours of flight time.[4]

The aircraft was eventually donated to the National Air and Space Museum for display.[5] Ray Stits was a mechanic and Second World War fighter pilot, but claimed he was not an engineer. He went on to develop several home-built designs, including the Stits SA-3A Playboy, which would be the basis for the VanGrunsven RV-1 and thousands of Van's Aircraft.[6]

Aircraft on display

File:SA-2A-Front.jpg
Stits SA-2A on display at the Steven F. Udvar-Hazy Center
File:Stits Sky Baby.jpg
Stits Sky Baby loaded with room to spare in the Smithsonian's transport trailer at the Stephen Udvar Hazy Center

The Sky Baby was on display at the EAA Airventure Museum in Oshkosh, Wisconsin on loan from the National Air and Space Museum.[7] Sky Baby has since been returned to the Steven F. Udvar-Hazy Center of the National Air and Space Museum.[citation needed]

Specifications (SA-2A)

Data from Sport Aviation

General characteristics

  • Crew: 1
  • Length: 9 ft 10 in (3.00 m)
  • Wingspan: 7 ft 2 in (2.18 m)
  • Height: 5 ft (1.5 m)
  • Wing area: 36.5 sq ft (3.39 m2)
  • Empty weight: 452 lb (205 kg)
  • Gross weight: 666 lb (302 kg)
  • Fuel capacity: 5 U.S. gallons (19 L; 4.2 imp gal)
  • Powerplant: 1 × Continental C85 four cylinder, four-stroke, aircraft engine with water injection, 112 hp (84 kW)
  • Propellers: 2-bladed aluminum

Performance

  • Maximum speed: 191 kn; 354 km/h (220 mph)
  • Cruise speed: 143 kn; 266 km/h (165 mph)
  • Stall speed: 52 kn; 97 km/h (60 mph)

See also

References

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