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| Stearman | |
|---|---|
| Name | Stearman |
| Type | Trainer aircraft |
| Manufacturer | Boeing (Stearman Aircraft Division) |
| First flight | 1934 |
| Introduced | 1936 |
| Primary user | United States Army Air Corps; United States Navy |
| Produced | 1934–1945 |
| Number built | ~8,584 |
Stearman is the informal name for a family of biplane trainers produced by the Stearman Aircraft Division of Boeing in the 1930s and 1940s. Widely used by the United States Army Air Corps and the United States Navy during the pre‑World War II and World War II eras, these aircraft became synonymous with primary pilot instruction and later found extensive postwar civilian roles. The type influenced training doctrine in Canada, Australia, and other Allied nations, and many examples survive in museums, airshows, and private collections.
The Stearman lineage began with the post‑World War I aviation boom and the consolidation of smaller firms into larger manufacturers such as Boeing and United Aircraft Corporation. In the early 1930s, pilot shortages and evolving pilot training requirements within the United States Army Air Corps led to procurement competitions in which the Stearman Model 75 competed against designs from Fairchild, Ryan Aeronautical Company, and Curtiss-Wright. After successful evaluation, the type entered large-scale production for the Army Air Corps (designated PT‑13/PT‑17) and the United States Navy (designated N2S). Production continued through the attack on Pearl Harbor and the height of World War II, with subcontractors including Vultee Aircraft building airframes under license to meet demand.
The design featured a robust two-seat, open-cockpit biplane configuration derived from earlier 1920s and 1930s trainer philosophies. Key design choices included fabric‑covered wooden wings with welded steel tube fuselage, fixed tailwheel undercarriage, and a tandem cockpit arrangement for instructor and trainee, influenced by training practices from institutions such as the Army Air Corps Flying School at Kelly Field and Randolph Field. Powerplants varied: radial engines such as the Continental R‑670, the Lycoming R‑680, and the Wright R‑760 were fitted across subtypes, affecting performance and maintenance regimes. The airframe’s docile handling and forgiving stall characteristics made it suitable for primary instruction programs run by Civilian Pilot Training Program contractors and military training units like the Flying Training Command.
Multiple factory and service designations tracked engine and equipment changes. Military designations included PT-13 (Continental R‑670), PT-17 (Lycoming R‑680), and PT-26 (enclosed cockpits for cold‑weather operation used in Royal Canadian Air Force service). Naval variants carried N2S designations with subvariants reflecting minor equipment fits for training at Naval Air Stations such as Pensacola and Corpus Christi. Civilian and company model numbers—Model 75, Model A‑75, and others—were used in manufacturer documentation and at airshows. Licensed production and contractor modifications by firms like Wichita area subcontractors expanded the baseline into cropdusters, aerial application conversions, and civil aerobatic performers.
As the primary trainer for thousands of cadets, the Stearman featured at flying schools across United States and Commonwealth training centers, supporting programs such as the Civilian Pilot Training Program and British Commonwealth Air Training Plan in Canada. Squadrons and training commands at Randolph Field, Vance Air Force Base (as a former training field), Kelly Field, and Sheppard Field used the type extensively. Naval aviators trained aboard aircraft from Naval Air Station Pensacola and Naval Air Station Corpus Christi. Postwar, surplus aircraft entered civilian airfields and were adapted for crop dusting in agricultural regions like the Central Valley (California) and the Midwest United States. The type also appeared in film productions and airshows associated with groups such as the Commemorative Air Force and the Experimental Aircraft Association.
After World War II vast numbers of surplus Stearmans were sold to civil operators, where they became crop dusters, banner tugs, mail haulers, and sporting aircraft at airshows. Conversion programs installed hoppers, spray booms, and modern avionics for operations by companies in the United States and Canada. Restorations by museums and private collectors returned many airframes to wartime livery for display at institutions such as the National Air and Space Museum, Museo del Aire equivalents, and regional aviation museums. The aircraft remains popular for pleasure flights, aerobatic demonstrations at events like the EAA AirVenture Oshkosh and for use by aerobatic teams at attractions including the Flying Circus style airshows.
Significant preserved examples are displayed and maintained in flying condition by museums and organizations: units can be seen at the National Museum of the United States Air Force, the Smithsonian Institution, the Museum of Flight (Seattle), and the Canadian Warplane Heritage Museum. Restored examples participate in airshows hosted by Imperial War Museums and regional aviation festivals in United Kingdom, Australia, and New Zealand. Private collections and specialty restoration facilities such as those affiliated with Biggin Hill Heritage Hangar and American restoration shops regularly overhaul airframes for compliance with contemporary airworthiness standards administered by agencies like the Federal Aviation Administration.
- Crew: two (student and instructor) - Length: 24 ft 9 in (Model‑75 approximate) - Wingspan: 32 ft 2 in - Powerplant: one Lycoming R‑680 radial engine (approx. 220–300 hp depending on subvariant) - Maximum speed: ~124 mph (199 km/h) - Service ceiling: ~13,000 ft - Range: ~505 mi (depending on load and subvariant)