Boeing-Stearman Model 75
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Template:Short description Template:Use American English Template:Use dmy dates Template:Infobox aircraft The Stearman (Boeing) Model 75 is an American biplane formerly used as a military trainer aircraft, of which at least 10,626 were built in the United States during the 1930s and 1940s.[1] Stearman Aircraft became a subsidiary of Boeing in 1934. Widely known as the Stearman, Boeing Stearman, or Kaydet, it served as a primary trainer for the United States Army Air Forces, the United States Navy (as the NS and N2S), and with the Royal Canadian Air Force as the Kaydet throughout World War II. After the conflict was over, thousands of surplus aircraft were sold on the civilian market. In the immediate postwar years, they became popular as crop dusters and sports planes, and for aerobatic and wing walking use in air shows.
Design and development
In late 1933, Stearman engineers Mac Short, Harold W. Zipp, and J. Jack Clark took a 1931 Lloyd Stearman design, and added cantilever landing gear and adjustable elevator trim tabs, to produce the Model 70. Able to withstand +12g and -9g, the aircraft was powered by a 210-hp Lycoming R-680, first flew on 1 January 1934, before flight tests were conducted at Wright Field, Naval Air Station Anacostia, and Pensacola. The Navy then requested a similar model built to Navy specifications, including a 200-hp Wright J-5 engine. The resultant Model 73, was designated NS-1 by the Navy, of which 41 were ordered, including enough spares to build another 20 aircraft.[2]
In the summer of 1934, Stearman engineers refined the Model 73 into the Model X75. The Army Air Corps evaluated the plane that autumn, powered by a 225-hp Wright R-760 or a 225-hp Lycoming R-680. In July 1935, the Army Air Corps ordered 26 with the Lycoming engine, designated the PT-13A, while the navy ordered an additional 20. In August 1936, the Army ordered an additional 50 PT-13As, followed by another 30 in October, and another 28 in December. Simultaneously, the company received orders for its primary trainer from the Argentinian navy, the Philippine Army Air Corps, and the Brazilian Air Force. In January 1937, the army ordered another 26 PT-13As.[2]
On 6 June 1941, the U.S. government issued Approved Type Certificate No. 743 for the civilian version of the Model 75. Designated the Model A75L3 (PT-13) and Model A75N1 (PT-17), about 60 were sold to civilian flights schools such as Parks College of Engineering, Aviation and Technology, and for export.[2]Template:Rp
On 15 March 1941, the company delivered the 1000th trainer to the Army, and the 1001st trainer to the Navy. Then on 27 August 1941, the company delivered the 2000th trainer to the Army. On 27 July 1944, the company delivered its 10,000th primary trainer.[2]Template:Rp
The Kaydet was a conventional biplane of rugged construction, with a large, fixed tailwheel undercarriage, and accommodation for the student and instructor in open cockpits in tandem. The radial engine was usually not cowled, although some Stearman operators choose to cowl the engine, most notably the Red Baron Stearman Squadron.
Operational history
Post-war usage
After World War II, thousands of surplus PT-17s were auctioned off to civilians and former military pilots. Many were modified for crop-dusting use, with a hopper for pesticide or fertilizer fitted in place of the front cockpit. Additional equipment included pumps, spray bars, and nozzles mounted below the lower wings. A popular approved modification to increase the maximum takeoff weight and climb performance involved fitting a larger Pratt & Whitney R-985 Wasp Junior engine and a constant-speed propeller.
Variants
Data from: United States Navy aircraft since 1911,[3] Boeing aircraft since 1916[4] 8,584 Model 70s, 75s and 76s were built, with additional "spares" bringing the number up to the sometimes quoted 10,346.[5]
USAAC/USAAF designations
The U.S. Army Air Forces Model 75 Kaydet had three different designations, PT-13, PT-17 and PT-18, depending on which type of radial engine was installed.
- PT-13
- Initial production version with Lycoming R-680-B4B engine, 26 built in 1936
- PT-13A Model A75 with R-680-7 engine, 92 delivered from 1937 to 1938.
- PT-13B R-680-11 engine, 255 delivered from 1939 to 1941.
- PT-13C Six PT-13Bs modified for instrument flying.
- PT-13D Model E75 with R-680-17 engine, 793 delivered
- PT-17
- Version with Continental R-670-5 engine, 2,942 delivered.
- PT-17A 136 PT-17s modified with blind-flying instrumentation.
- PT-17B Three PT-17s modified with agricultural spraying equipment for pest control near army bases.
- PT-17C Single PT-17 conversion with standardized Army-Navy equipment.
- PT-18
- Version with Jacobs R-755-7 engine, 150 built. Further production was cancelled as the engines were needed for other types of trainers.
- PT-18A Six PT-18s modified with blind-flying instrumentation.
- PT-27
- USAAF paperwork designation given to 300 D75N1/PT-17 aircraft supplied under Lend-Lease to the Royal Canadian Air Force. The last example built, FK108, had a canopy installed.Template:Efn[6]
- NS
- Up to 61 Model 73B1 delivered, powered by Template:Cvt Wright J-5/R-790 Whirlwind radials[7]
- N2S
- Known colloquially as the "Yellow Peril" from its overall yellow paint scheme.
- N2S-1 Model A75N1 with Continental R-670-14 engine, 250 delivered.
- N2S-2 Model B75 with Lycoming R-680-8 engine, 125 delivered in 1941.
- N2S-3 Model B75N1 with Continental R-670-4 engine, 1,875 delivered.
- N2S-4 Model A75N1 with Continental R-670-4 and -5 engines, 457 delivered of 579 ordered, including 99 PT-17s diverted from U.S. Army orders.
- N2S-5 Model E75 with Lycoming R-680-17 engine, 1,450 delivered.
Company designations
- Stearman 70
- Company designation for prototype, powered by Template:Cvt Lycoming radial engine, designated XPT-943 for evaluation[8]
- Model 73
- Initial production version, 61 built for U.S. Navy as NS plus export variants[7]
- Model 73L3
- Version for the Philippines, powered by Template:Cvt R-680-4 or R-680C1 engines, seven built[9]
- Model A73B1
- Seven aircraft for Cuban Air Force powered by Template:Cvt Wright R-790 Whirlwind, delivered 1939–1940[9]
- Model A73L3
- Improved version for the Philippines, three built[10]
- Stearman 75
- (or X75) Evaluated by the U.S. Army as a primary trainer, the X75L3 became the PT-13 prototype. Variants of the 75 formed the PT-17 family.
- Stearman 76
- Export trainer and armed version of the 75 with a gun ring and one or two fixed forward firing machine guns.
- A76B4
- 5 built for Venezuela.
- A76C3
- 15 built for Brazil.
- B76C3
- 15 built with cameras for Brazil.
- 76D1
- 16 built for Argentina and three for Philippines as BT-1.
- S76D1
- seaplane version of 76D1 for Argentina
- 76D3
- 24 built for Philippine Constabulary as BT-1 armed advanced trainer, and 24 built for Cuba.
Other designations
- Stearman XPT-943
- Designation assigned to the X70 evaluated at Wright Field
- Stearman Kaydet
- Name used for aircraft in Royal Canadian Air Force service
- American Airmotive NA-75
- Single-seat agricultural conversion of Model 75, fitted with new, high-lift wings[11]
Operators
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- Argentine Air Force
- Argentine Navy received 16 Model 76D1s 1936 to 1937[12] and 60 N2S Kaydet post-war; all were retired by the early 1960s[13]
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- Brazilian Air Force Model A75L3 and 76.[15]
- Template:Country data Canada
- Royal Canadian Air Force received 301 PT-27s under Lend Lease.[16]
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- Republic of China Air Force received 150 PT-17s under Lend-Lease,[17] and 104 refurbished aircraft post war in Taiwan. The ROCAF used them until 1958.[18]
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- Colombian Air Force[14]
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- Imperial Iranian Air Force
- Script error: No such module "flag".
- Israeli Air Force purchased 20 PT-17s.[19]
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- Mexican Air Force
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- Nicaraguan Air ForceScript error: No such module "Unsubst".
- Template:Country data Paraguay
- Paraguayan Air Force[14]
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- Peruvian Air ForceScript error: No such module "Unsubst".
- Template:Country data Philippines
- Philippine Army Air Corps[15]
- Philippine Air Force
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- United States Army Air Corps/United States Army Air Forces[15]
- United States Marine CorpsScript error: No such module "Unsubst".
- United States Navy[15]
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- Venezuelan Air Force[15]
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- Yugoslav Air Force
Surviving aircraft
A considerable number of Stearmans remain in flying condition throughout the world, as the type remains a popular sport plane and warbird.
Argentina
- 308 – N2S-5 airworthy at the Argentine Naval Aviation Museum in Bahía Blanca, Buenos Aires.[13]
Australia
- 75-6488 – B75N1 registered as VH-EYC, airworthy, owned by Steven Bradley, South Australia 5134[20]
- 75-7462 - B75N1 - registered as VH-PWS, airworthy, owned by Michael Murphy, Royal Aero Club of Victoria.
- 75-8314 – E75 Registered as VH-USE, airworthy, owned by Raalin, Western Australia 6208[21]
Austria
Brazil
- K-132 – A75L3 on display at the Museu Aeroespacial in Rio de Janeiro[23]
- K-210 – A76C3 on display at the Museu Aeroespacial in Rio de Janeiro[24]
- 38010 – N2S-3 on display at the TAM Museum in São Carlos, São Paulo[25]
Canada
- 41-8621 – PT-17 airworthy at the Canadian Warplane Heritage Museum in Hamilton, Ontario.[26]
- 42-17456 – PT-13D owned by Daniel Jones of Lacombe, Alberta.[27][28]
- 5284 – N2S-3 under restoration to airworthy with Daniel Jones of Lacombe, Alberta[29][30]
- 5293 – N2S-3 owned by J. Kurtin of Collingwood, Ontario[31][32]
- 30083 – N2S-4 on display at the Reynolds-Alberta Museum in Wetaskiwin, Alberta[33][34]
- 61105 – N2S-5 with Bruce Bond of Sarnia, Ontario[35][36]
- 75-3498 – PT-17 airworthy owned by Great River Aviation Ltd. of Whitehorse, Yukon o/a Klondike Airways.[37][38]
Colombia
- FAC-62 – PT-17 airworthyScript error: No such module "Unsubst".
- FAC-1995 – PT-17 airworthyScript error: No such module "Unsubst".
Iceland
- T5-1556 – PT-17 is airworthy with Erling Pétur Erlingsson in Hafnarfjörður, Capital Region. It is the oldest airplane in Iceland. It was brought to the country in 1941 by the aircraft carrier Template:USS and damaged in an accident in 1943.[39][40][41]
Indonesia
- PT-13D is on display at Dirgantara Mandala Museum in Yogyakarta. The aircraft is painted in Taloa Academy of Aeronautics livery.[42][43]
Israel
- 2752 – PT-17 is airworthy at the Israeli Air Force Museum in Hatzerim.[44]
Mexico
- EPS-6084 – PT-17 on static display at the Template:Ill in Santa Lucía, Zumpango.[45]Template:Better source needed
Netherlands
- 75-7027 – PT-13B is airworthy, registered as PH-TOX, owned by Joe Brewer and based at Oostwold Airport.[46]
- 75-7213 – N2S-3 is airworthy, registered as N9912H, owned by the Nordsiek family and based at Breda International Airport.[47]
- 75-5864 – PT-13D Kaydet is airworthy, registered as N1944S based at Texel International Airport[48]
New Zealand
- 75-647 – PT-17 airworthy with R. J. S. Jenkins in Ardmore, Auckland.[49]
- 75-2055 – PT-17 airworthy with R. B. Mackley in Milford.[50]
- 75-2100 – PT-17 airworthy with Classic Aircraft Sales Limited in Blenheim.[51]
- 75-2724 – PT-17 airworthy with B. L. Govenlock in Hastings.[52]
- 75-3132 – PT-17 airworthy with the Antonievich Family Trust in Pukekohe.[53]
- 75-3655 – PT-17 airworthy with M. P. Cantlon in Mount Maunganui.[54]
- 75-4245 – PT-17 airworthy with the Strome Farm Trust in Drury.[55]
- 75-5064 – PT-13D airworthy with the Stearman Syndicate in Drury.[56]
- 75-5907 – PT-13D airworthy with Stearman 03 Limited in Mount Maunganui.[57]
- 75-8025A – N2S-3 airworthy with M. J. Dean in Mount Maunganui.[58]
Peru
- PT-17 is on display at the Instituto de Estudios Históricos Aeroespaciales del Perú, Miraflores, Lima.Script error: No such module "Unsubst".
Spain
- PT-13 on display at the Template:Ill in Cuatro Vientos, Madrid.[59]
- PT-17 on display at the Fundación Infante de Orleans in Cuatro Vientos, Madrid.[60]
Switzerland
- 75-5436 – PT-13D is airworthy, registered as HB-RBG, and based at the Fliegermuseum Altenrhein.[61] Built in 1943 and restored to airworthiness in 1989 after sustaining considerable damage during an emergency landing in the grounds of the Stadler Rail factory in Altenrhein due to engine failure.[62]
Taiwan
- PT-17 is on static display at the Aviation Education Exhibition Hall in Gangshan District, Kaohsiung City.[63]
United States
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- Model 70 is airworthy at the Western Antique Aeroplane & Automobile Museum in Hood River, Oregon. It is the original prototype of the Model 75.[64]
- 37-0099 – PT-13A is on static display at the Museum of Flight in Seattle, Washington.[65][66]
- 41-7121 - PT-17 is on static display at the US Army Aviation Museum in Fort Novosel, Alabama.
- 41-7960 – PT-17 is airworthy at Mississippi State University in Starkville, Mississippi. It is used as a research aircraft and glider tow-plane.[67][68]
- 41-8786 – PT-17 is in storage at the New England Air Museum in Windsor Locks, Connecticut.[69]
- 41-8882 – PT-17 on static display at the Pima Air and Space Museum in Tucson, Arizona.[70]
- 41-25254 – PT-17 is airworthy at the Military Aviation Museum in Pungo, Virginia.[71][72][73]
- 41-25284 – PT-17 is on static display at the Hill Aerospace Museum in Roy, Utah.[74]
- 41-25588 – PT-17 is airworthy at the Charles M. Schulz–Sonoma County Airport in Santa Rosa, California.[75]Script error: No such module "Unsubst".
- 41-25623 – PT-17 is on display at Patriots Point in Charleston, South Carolina.Script error: No such module "Unsubst".
- 42-15687 – PT-27 is on display at the Vintage Flying Museum in Fort Worth, Texas.[76]
- 42-16365 – PT-17 is on static display at the Museum of Aviation in Warner Robins, Georgia.[77][74]
- 42-16388 – PT-17D is on static display at the March Field Air Museum near Riverside, California.[78]
- 42-16691 – PT-17 is on static display at the Castle Air Museum in Atwater, California.[74]
- 42-17591 – PT-13D is on static display at the Planes of Fame Air Museum in Chino, California.[79][80][81]
- 42-17724 – PT-13D is on static display at the National Museum of African American History and Culture in Washington, DC. It was used in 1944 to train members of the Tuskegee Airmen.[82][83][84]
- 42-17763 – PT-13D is on static display at the Planes of Fame Air Museum in Valle, Arizona.[79][80][85]
- 42-17800 – PT-13D is on static display at the National Museum of the United States Air Force in Dayton, Ohio. This aircraft is the 63rd to last aircraft built and was donated to the museum in 1959 by the Boeing Aircraft Company, which purchased the Stearman Company in 1934.[86][87][88]
- 3514 – N2S-3 is airworthy with Neil Alan Raaz in Colleyville, Texas.[89][90]
- 3558 – N2S-2 is under restoration to airworthy condition at the Planes of Fame Air Museum in Chino, California.[79][80][91]
- 5369 – N2S-3 is on static display at the National Naval Aviation Museum in Pensacola, Florida. It was flown by George H. W. Bush during his initial training as a naval pilot.[92]
- 7591 – N2S-3 is airworthy at the Valiant Air Command Warbird Museum in Titusville, Florida.[93][94]
- 7718 – N2S-3 is airworthy at the Lone Star Flight Museum in Houston, Texas.[95][96]
- 15923 – N2S is on static display at the Carolinas Aviation Museum in Charlotte, North Carolina.[97]Script error: No such module "Unsubst".
- 29981 – N2S-4 is on display at the Air Zoo in Kalamazoo, Michigan.[98][99]
- 38278 – N2S-3 is airworthy at the Tri-State Warbird Museum in Batavia, Ohio.[100][101]
- 38490 – N2S-5 is airworthy at the Lone Star Flight Museum in Houston, Texas.[95][102]
- 43197 – N2S-5 is under restoration to airworthy condition with the Commemorative Air Force Utah Wing in Heber City, Utah.[103][104]
- 61064 – N2S-5 on static display at the Udvar-Hazy Center of the National Air and Space Museum in Chantilly, Virginia.[105][106]
- 92468 – N2S-3 is on static display at the Pacific Aviation Museum Pearl Harbor in Honolulu, Hawaii. It was flown by George H. W. Bush during his initial training as a naval pilot.[107][108]
- 75-133 – PT-17 is airworthy at the Simsbury Airport in Simsbury, Connecticut.
- 75-3845 – PT-27 is under restoration to airworthy condition at the Texas Air Museum in Slaton, Texas.[109]
- 75-5337 – PT-13D is airworthy and owned by Sharon D. Smith. It is presumably located in DeRidder, Louisiana.[110][111]
- 75-7540 – B75N1 is airworthy and resides at the Commemorative Air Force Airbase Arizona, Mesa, Arizona.
- 75-8234 - E75N1 is airworthy, owned by Ageless Aviation Dreams Foundation, Carson City, NV.
- 75-8498 – N2S-5 is airworthy at the CAF Big Easy Wing in New Orleans, Louisiana.[112]
- A75N1 – PT-17 is on display at the College Park Aviation Museum in College Park, Maryland. It was flown by Gus McLeod for the first open-cockpit flight over the North Pole.[113]
- N2S-3 is on display at the Western Antique Aeroplane and Automobile Museum in Hood River, Oregon.[114]
- Stearman on display at Scottsdale Airport (KSDL)
Specifications (PT-17)
In popular culture
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See also
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- Arado Ar 66
- Bücker Bü 131
- De Havilland Tiger Moth
- Fleet Finch
- Focke-Wulf Fw 44
- Gotha Go 145
- Naval Aircraft Factory N3N
- Repülőgépgyár Levente II
- Polikarpov Po-2
- PWS-26
- Stampe-Vertongen SV.4
References
Footnotes
Notes
Bibliography
- Andrade, John. U.S. Military Aircraft Designations and Serials since 1909, Midland Counties Publications, 1979, Template:ISBN
- Avis, Jim and Bowman, Martin. Stearman: A Pictorial History. Motorbooks, 1997. Template:ISBN.
- Bowers, Peter M. Boeing Aircraft since 1916. London:Putnam, 1989. Template:ISBN.
- Nordeen, Lon. Fighters Over Israel. London: Guild Publishing, 1991.
- Phillips, Edward H. Stearman Aircraft: A Detailed History . Specialty Press, 2006. Template:ISBN.
- Script error: No such module "Citation/CS1".
- Swanborough, F.G. and Peter M. Bowers. United States Military Aircraft since 1909. London: Putnam, 1963.
- Taylor, John W. R. Jane's All The World's Aircraft 1965–66. London: Sampson Low, Marston & Company, 1965.
- Script error: No such module "citation/CS1".
Videography
- Stearman, Lloyd. Stearmans, You Gotta Love Them. Lap Records, 2005. (NTSC Format)
External links
Template:Sister project Template:External media
- Interview with Boeing PT-17 air show pilot John Mohr.
- Netherlander Hans Nordsiek's "The Storyteller" homepage, featuring his "Old Crow" Stearman biplane
- FAA Type Certificate Template:Webarchive
Template:Stearman Aircraft Template:Boeing model numbers Template:USAF trainer aircraft Template:USN trainer aircraft Template:Wright Field project numbers
- ↑ National Museum of the United States Air Force gives the figure 10,346 but this includes the equivalent airframes in manufactured spare parts.
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- ↑ a b Bowers 1989, pp. 252–253.
- ↑ Bowers 1989, pp. 251–252.
- ↑ a b Bowers 1989, p. 253.
- ↑ Bowers 1989, p. 254.
- ↑ Taylor 1965, p. 178.
- ↑ Bowers 1989, p. 268.
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d e f Andrade 1979, p. 159
- ↑ a b c d e Andrade 1979, p. 158
- ↑ Bowers 1989, p. 265.
- ↑ Bowers 1989, p. 262.
- ↑ Bowers 1989, pp. 260–261.
- ↑ Nordeen 1991, p. 27.
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