Stearman_PT-13A.htm

Stearman PT-13A Kaydet

The Stearman Kaydet (also known as the Stearman (Boeing) Model 75) was a Biplane Primary Trainer with seating for an instructor and trainee, in inline open cockpits, and had fixed landing gear. Several variants ofthe plane were built, primarily differentiated by they type of engine fitted. Per Reference [8] the base PT-13, or whih 26 were built, was fitted with a 210 HP Lycoming R-680-B4B radial engine. The PT-13A variant, of which 92 were built, was fitted with a 220 HP ycoming R-680-7 radial engine. The PT-17 was a sinilar design fitted with Continental R-670 radial engines, and the PT-18 was a variant fitted with Jacobs R-755 radial engines. The US Navy also operated these type aircraft under the desginations NS and N2S. Export variants, designated the Stearman 76 were also sold to Venezuela, Brazil, Argentina, the Philllipines, and Cuba. The type was also provided to Canada as part of Lend/Lease during WWII. Per reference [8] this type was introduced into service in 1934, and a total of 10,626 were built.

As shown in the images below distinguishing features of this aircraft including;

radial engine
inline open air cockpits for the instructor and trainee
Biplane wings
fixed landing gear

[Image Sources: US Government/Public Domain via Ref [8] - as annotated by this site]

[Source: Ref [8] - US Government/Public Domain]

[Source: Ref [14] - Scanned from a US Government Document - Believed to be in the Public Domain]

PT-17/PT-18 Variant

The table below summarizes the current data collected on this type aircraft, identifying sources for the data

		PT-13A	Secondary Sources	Notes
Primary Source		2
No of Crew		2
Engine:
Qty		1	5
Model		R-680-7	5
Displacement	(cu in)	680	5
Power
Military	(HP)
War Emergency	(HP)
Normal	(HP)		5
Take Off	(HP)	220	5
Eng Dims
Length	(ft)	3.09	5
Width/Dia	(ft)	3.63	5
Height	(ft)
Base Engine Wt	(lb)	500	5
Propeller
# Blades		2
Dia	(ft)	8.5
Manufacturer
Type
Wing
Span	(ft)
Root Thickness	(%)
	(in)
Total Area	(sq ft)	298
Wing (less Ailerons & Flaps)	(sq ft)
Ailerons	(sq ft)
Flaps	(sq ft)
Tail Area	(sq ft)		3
V Tail Area	(sq ft)		3
Fin	(sq ft)
Rudder	(sq ft)
H Tail Area	(sq ft)		3
Stabilizer	(sq ft)
Elevator	(sq ft)
Total Control Surf Area	(sq ft)
Length
Overall	(ft)
Fuselage	(ft)
Body	(ft)	24.75
Body Depth	(ft)
Body Width	(ft)
Fuel Tank Volume	(gal)
Wing Tanks	(gal)
FuselageTanks	(gal)
Oil Tank Volume	(gal)
Water Injection Fluid Tank Volume	(gal)
Wetted Area (sqf)	(sq ft)
Pwr Ldng	(lb/HP)	11.97
Wing Ldng	(lb/sq ft)	8.84
Struct. Des. GW	(lb)	2638
Ultimate Load Factor	(G's)
Design Speed	(mph)	125
Not to Exceed Speed	(mph)

Total Struct Weight		1051
Total Wing		444
Wing
Ailerons
Flaps
Fuselage Carry-Through
Tail		72
H Tail		52
Stabilizer
Elevator
V Tail		20
Fin
Rudder
Body + Eng Section + LG
Body + LG		535
Body		274
Fuselage
Engine Section
Landing Gear		261
Mn Landing Gr		233
Tail/Nose Aux LG		28
Tail Hook
Booms
Nacelles
Total Propulsion Weight		714
Engine w/ Accessories		524
Engine(s) as Installed		500
Accessories		24
Turbocharger(s)
Controls		11
Propeller(s)		84
2-Blade		84
3-Blade
4-Blade
Starting System		28
Water Injection System
Tanks
Piping Etc
Cooling System
Lube System		12
Tanks
Piping Etc
Fuel System		55
Tanks
Piping Etc
Total Sys. & Eqpmt.		181
Instruments		29
Surface Controls		64
Hydraulics
Electrical Equip		11
Electronics (Purple means incl in Furn/Gray in Useful Ld)
Arm Prov/Equipment & Armor
Furnishings		77
Anti-Ice (If not in Furn)
Other /Misc
Hoisting Gear
Floatation Gear
Armor Plate

Empty Wt		1946
Basic Mission Useful Load		688
Crew		400
Equipment
Oil		33
Fuel		255
Fuel & Oil Trapped in Systems
Water Solution for Engine Injection
Bombs/Torp Etc
Radio (if Not Included in Empty Wt)
Nav Equipment
Oxygen System
Armament
Guns & Ammo
Guns
Ammo
Pyrotechnics
Camera
Other
Other Useful Load
Basic Mission GW		2634

Notes: This website has been developed with a number of low cost or free programs including Hot Metal Pro, KompoZer, MicroSoft Designer and Da Button Factory.com

Rev 3-18-25

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