STATUS: Retired, Out-of-Service
MANUFACTURER(S): Boeing-Stearman - USA
OPERATORS: Argentina; Bolivia; Brazil; Canada; China; Colombia; Cuba; Dominican Republic; Greece; Guatemala; Honduras; Iran; Israel; Mexico; Philippines; United States; Venezuela
LENGTH: 25.03 feet (7.63 meters)
WIDTH: 32.15 feet (9.8 meters)
HEIGHT: 9.15 feet (2.79 meters)
WEIGHT (EMPTY): 1,936 pounds (878 kilograms)
WEIGHT (MTOW): 2,716 pounds (1,232 kilograms)
ENGINE: 1 x Continental R-670-5 Seven-cylinder radial developing 220 horsepower.
SPEED (MAX): 124 miles-per-hour (199 kilometers-per-hour; 107 knots)
RANGE: 505 miles (812 kilometers; 438 nautical miles)
CEILING: 11,204 feet (3,415 meters; 2.12 miles)
Detailing the development and operational history of the Boeing-Stearman Kaydet Biplane Trainer / Aerobatic Aircraft.
Entry last updated on 6/7/2018.
Authored by Staff Writer. Content ©www.MilitaryFactory.com.
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 flown as the "X-70" as early as 1933. The two-seat biplane would evolved into a series of trainers under the PT-13, PT-15, PT-18 and PT-27 designations and serve through World War 2 and beyond, ultimately becoming a prize aircraft for any aviation aficionado.
The "Kaydet" was initially received by the United States Navy in the form of the Model 73 production series and designated as the NS-1 produced in no fewer than 61 delivered examples. The Model 75 was derived from this production model which was then accepted by the United States Army as the PT-13. These versions were fitted with a Lycoming R-680 engine of 215 horsepower output. 2,141 PT-13 examples were produced and this in five subvariants (PT-13 followed by A, B, C, and D models). Further development led to increasingly improved versions of the base Model 75 that featured a host of powerplant and instrument changes. Kaydets were now being produced on orders numbering thousands and included a slew of USN and US Army variants differing mainly in engine types installed.
Introduction of the Continental-brand R-670-5 series of engines led to a new designation as the PT-17 of which 3,519 were produced (across A- and B-model variants). Later models produced with a Jacobs R-755 powerplant were further designated as PT-18's and these numbered 150 units. The Boeing-Stearman design was also sold to Canada under Lend-Lease during World War 2 as the PT-27 (with enclosed cockpit) and numbered 300 examples delivered.
Total production of Model 75 was approximately 9,800 units.
The Canadian Lend-Lease Model 75s were called "Kaydet" and the name stuck over time, still being used today to identify the line. Kaydets managed to see considerable use after the war as well in the aerial acrobat role and crop dusting. Operators spanned the globe from Argentina and Bolivia to the Philippines and Venezuela (see operators listing below for complete global reach).
Taiwan (Republic of China) was another wartime Lend-Lease partner and recipient of the Kaydet.
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General Assessment (BETA)
Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
MF Power Rating (BETA)
The MF Power Rating takes into account over sixty individual factors related to this aircraft entry. The rating is out of 100 total possible points.
Relative Maximum Speed Rating
This entry's maximum listed speed (124mph).
Graph average of 112.5 miles-per-hour.
Graph showcases the Boeing-Stearman PT-17A Kaydet's operational range (on internal fuel) when compared to distances between major cities.
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units