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Boeing-Stearman Kaydet
The Boeing-Stearman Kaydet trainer is now a much-loved collectors item for private aircraft owners.
By Staff Writer
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When The Boeing Company acquired the Stearman company in 1939, it also acquired the design and production rights to the promising Model 75 series, which itself was flow as the X-70 as early as 1933. The two-seat biplane would go on to become the PT-13, PT-15, PT-18 and PT-27 series of trainers that would serve throughout the Second World War and beyond, becoming the prize in the collection of many an aviation aficionados to this day.
The "Kaydet" was initially received by the United States Navy in the form of the Model 73 production series model and designated as the NS-1 in no fewer than 61 total delivered examples. The Model 75 was derived from this production model and was then accepted by the United States Army with the more identifiable PT-13 designation, though these models were now fitted with a Lycoming-brand powerplant of some 215 horsepower. Further developments led to increasingly improved versions of the base Model 75 that featured a host of powerplant and instrumental changes. Kaydets were now being produced on orders of thousands and consisted of a slew of USN and US Army variants differing mainly in engine types.
Introduction of the Continental-brand series of engines led to a new designation in the form of the PT-17. Later models produced with a Jacobs powerplant were further designated as PT-18's. The Boeing-Stearman design was also offered up in 300 examples to Canada as the PT-27 (featuring an enclosed cockpit), which in turn provided the further designation of "Kaydet" to their models. This designation which would go on to become the indicative designation to the series as a whole. The Kaydet name stuck and is still used today to identify all models derived from the original Stearman Model 75 - these include the PT-13, PT-15 and the PT-18 along with the Canadian PT-27.
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Last Revision: 7/12/2010
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| Specifications for the Boeing-Stearman PT-17A Kaydet |
| Dimensions: |
Length: 25.03ft (7.63m)
Width: 32.15ft (9.80m)
Height: 9.15ft (2.79m)
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| Performance: (About MACH) |
Max Speed: 124mph (199kmh; 107kts)
Max Range: 505miles (812km)
Rate-of-Climb: 0ft/min (0m/min)
Service Ceiling: 11,204ft (3,415m; 2.1miles)
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| Structure: |
Accommodation: 2
Hardpoints: 0
Empty Weight: 1,936lbs (878kg)
MTOW: 2,716lbs (1,232kg)
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| Powerplant: |
| Engine(s): 1 x Continental R-670-5 Seven-cylinder radial delivering 220hp. |
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| Pictures of the Boeing-Stearman Kaydet |
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| 1941 |
Designation: Boeing-Stearman Kaydet
Classification Type: Trainer Aircraft
Contractor: Boeing-Stearman - USA
Country of Origin: United States
Production Total: 10,346 |
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Operators: Argentina; Bolivia; Brazil; Canada; China; Colombia; Cuba; Dominican Republic; Greece; Guatemala; Honduras; Iran; Israel; Mexico; Philippines; United States; Venezuela
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| Variants |
X-70 - Original Stearman Prototype Model
Model 75 - Stearman Developed X-70; Became Boeing product through acquisition of the Stearman company.
NS-1 - US Navy Designation of the Model 73 production models; 61 examples delivered.
PT-13 - US Army Model Designation fitted with Lycoming R-680-5 radial 215hp piston engine; 26 examples delivered.
PT-13A - Further development of the PT-13; fitted with R-680-7 engine of 220hp; 92 examples produced.
PT-13B - Fitted with R-680-11 powerplant; 255 examples delivered.
PT-13C - Night Flying Conversion Models; 6 examples produced in this fashion.
PT-13D - "Common" US Army and Navy Production Model.
PT-17 - Fitted with Continental R-670-5 radial; 3,510 produced.
PT-17A - "Blind Flying" Variant with specialized instrumentation; 18 such produced.
PT-17B - "Pest Control" Variant for crop dusting; 3 such produced.
N2S - US Navy Model Designation based on the Model 75.
N2S-1 - USN Model; fitted with R-670-14 engine; 250 models produced.
N2S-2 - USN Model; fitted with R-680-8 engine; 125 produced.
N2S-3 - USN Model; fitted with R-670-4 engine; 1,875 produced.
N2S-4 - USN Model; fitted with R-670-5 engine; 1,051 produced.
N2S-5 - USN Model; fitted with R-680-17 engine; 1,450 examples produced.
PT-18 - Variants fitted with Jacob R-755-7 radial powerplant.
PT-18A - "Blind Flying" PT-18 Model Variant
PT-27 - Canadian Export Model; 300 examples delivered; named "Kaydet" in Canada which today translates as the series name as a whole; Enclosed cockpit.
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