View source for Boeing-Stearman Model 75

{{Aircraft infobox
| name = Boeing-Stearman Model 75
| image = Boeing PT-17-BW Kaydet ‘23 - 23 - U.S.Navy’ (N7058Q) (50906088841).jpg
| caption = Boeing-Stearman Model 75. Photo: Alan Wilson, CC BY-SA 2.0, via [[commons:File:Boeing PT-17-BW Kaydet ‘23 - 23 - U.S.Navy’ (N7058Q) (50906088841).jpg|Wikimedia Commons]]
| make = Boeing
| type = Biplane trainer
| number_built = 10,626 (includes model 70, 75 and 76)
| faa_registered = 1,638 (FAA register, October 30, 2026)
| seats = 2
| engine = Continental R-670-5, 220 hp
| cruise = 96 mph (PT-17)
| ceiling = 13,200 ft (PT-17)
| gross_weight = 2,635 lb (PT-17)
| category = Historic aircraft
}}

The '''Boeing-Stearman Model 75''', widely known as the '''Stearman''' or '''Kaydet''', is a biplane built as a military trainer; at least 10,626 were built in the United States in the 1930s and 1940s. Stearman Aircraft became a subsidiary of Boeing in 1934. It was the primary trainer of the U.S. Army Air Forces, the U.S. Navy (as the NS and N2S) and the Royal Canadian Air Force throughout World War II.<ref name="wp"/> In the U.S. there are 1,638 with a valid registration.<ref name="faa"/>

== History ==
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 make the Model 70. Strong enough for +12 and −9 g, it used a 210 hp Lycoming R-680 and first flew on January 1, 1934. The Navy then asked for a version to its own specification, the Model 73 or NS-1.<ref name="wp"/>

The Army Air Forces flew the Model 75 under three names depending on its radial engine: PT-13 (Lycoming R-680), PT-17 and PT-18.<ref name="wp"/> The PT-17 (A75N1) is the most common Stearman on the U.S. register today.<ref name="faa"/>

== After the war ==
After World War II thousands of surplus Stearmans were sold to civilians and former military pilots. Many became crop dusters, with a hopper for chemicals in place of the front cockpit and spray bars under the lower wings, and a popular change fitted a bigger Pratt & Whitney R-985 Wasp Junior with a constant-speed propeller. Others became sport planes and air-show mounts for aerobatics and wing walking.<ref name="wp"/>

== Registered in the United States ==
The FAA register lists '''1,638''' of these airplanes with a valid U.S. registration. Here they are by the model name the FAA uses.<ref name="faa"/>
<div class="aw-wide">
{| class="wikitable sortable"
! FAA model name !! Registered
|-
| A75N1(PT17) || 752
|-
| E75 || 257
|-
| B75N1 || 239
|-
| A75 || 93
|-
| E75N1 || 76
|-
| A75N1 || 65
|-
| PT-17 || 37
|-
| D75N1 || 35
|-
| PT-13D || 24
|-
| 75 || 17
|-
| B75 || 15
|-
| N2S-3 || 7
|-
| N2S-5 || 5
|-
| PT-13B || 5
|-
| PT-13 || 3
|-
| E75(N2S-5) || 2
|-
| N2S-4 || 2
|-
| B75(N2S-2) || 1
|-
| N2S-1 || 1
|-
| PT-17A || 1
|-
| ''1 other model names'' || 1
|}
</div>

== Specifications (PT-17) ==
<div class="aw-wide">
{| class="wikitable"
! Item !! PT-17
|-
| Crew || 2
|-
| Length || 24 ft 9 in
|-
| Wingspan || 32 ft 2 in
|-
| Height || 9 ft 8 in
|-
| Wing area || 298 sq ft
|-
| Empty weight || 1,931 lb
|-
| Maximum takeoff weight || 2,635 lb
|-
| Fuel || 46 USgal
|-
| Engine || Continental R-670-5, 220 hp (7-cylinder air-cooled radial piston engine)
|-
| Propeller || fixed-pitch propeller
|-
| Maximum speed || 124 mph
|-
| Cruise speed || 96 mph
|-
| Service ceiling || 13,200 ft
|}
</div>
Figures as given in the Wikipedia article and its sources.<ref name="wp"/>

{{Owner notes}}

== Photos ==
<gallery mode="packed" heights="170">
File:Stearman.e75.g-bswc.longshot.arp.jpg|Boeing Stearman E75 (PT-13D) Kaydet, UK registration G-BSWC, at Keevil Airfield, Wiltshire, England. Photo: Arpingstone, Public domain
File:Boeing-Stearman NS-1-1936.jpg|Boeing-Stearman NS-1 Bi-plane. Photo: Unknown authorUnknown author, Public domain
File:N2S Kaydet ambulance 1942.jpg|Boeing-Stearman Model 75. Photo: United States. Office of War Information. Overseas Picture Division. W, Public domain
File:Boeing Stearman top view.jpg|IAF Boeing Stearman PT-13. Photo: Uri Ben-Avraham, CC BY-SA 2.5
File:N2S-2 NAS Corpus Christi 1943.jpg|Boeing-Stearman Model 75. Photo: USN, Public domain
File:Ultimo Stearman de la Aviación Naval en vuelo.jpg|Boeing-Stearman Model 75. Photo: Chuckborri, CC BY 3.0
File:North Pole Stearman.JPG|Boeing-Stearman Model 75. Photo: FlugKerl2, CC BY-SA 3.0
File:Stearman Modelo PT-17 en el IEHAP-Lima.jpg|Boeing-Stearman Model 75. Photo: JAlejandroRM, CC BY-SA 3.0
</gallery>
All photos are from [[commons:Main Page|Wikimedia Commons]]; click a photo for its full credit and license.

== Buying a Boeing-Stearman Model 75 ==
{{For sale soon}}

== Sources ==
<references>
<ref name="wp">Wikipedia, "[https://en.wikipedia.org/wiki/Boeing-Stearman_Model_75 Boeing-Stearman Model 75]", read November 1, 2026. Airplane Wiki's text is written in its own words; facts are checked against this article and its sources.</ref>
<ref name="faa">Federal Aviation Administration, [https://www.faa.gov/licenses_certificates/aircraft_certification/aircraft_registry/releasable_aircraft_download Releasable Aircraft Database], file dated October 30, 2026. Valid registrations of fixed-wing airplanes whose FAA maker and model names belong to this family. Airplane Wiki uses only counts from this file, never owner names or addresses.</ref>
</references>