Four prototypes of the YPT-9B were produced for the Army between 1930 and 1931.  A conversion of the Model 6-A, this YPT-9B is equipped with a 210 HP Lycoming engine and is one of only two made.

Constructed of welded Chrome-Moly steel tubing in truss form.  Solid Spruce spars and Dural metal edges were all covered in fabric. As with most trainers, the practicality of use, ease of maintenance and the ability to take abuse from the beginner pilot came before beauty.

The civilian 6-L was created as a pilot trainer but hoped to catch the sportsman pilot.  A baggage compartment with an 86 lb. capacity contained two 20 lb. parachutes.  A first aid kit and fire extinguisher were standard equipment.

This YPT-9B was used at the Boeing School of Aeronautics aerobatic training. It later found a home as a seed sprayer and crop duster until procured by Yanks in 1987.

 

DISPLAY STATUS COUNTRY OF ORIGIN CURRENT LOCATION
 Own  United States Legends Hangar
PURPOSE & TYPE MATERIALS ERA & DATE RANGE
 Trainer Steel Golden Age
1918 – 1939
PRODUCTION &
ACQUISITION
SPECIFICATIONS SERVICE HISTORY
MFG: Stearman
First Produced: 1930
Number Built: 4-PT-9s total; 2 YPT-9B models
Armament: NoneProcured by Yanks in 1987.
Wingspan: 32’ upper, 28’ lower
Wing Area: 272 sq ft
Length: 24’8”
Height: 9’6”
Empty Weight: 2,551 lbs
Gross Weight: 1,800 lbs
Powerplant: Lycoming R-680-17
Thrust:
Cruise Speed: 100 mph
Maximum Speed: 120 mph
Range: 500 miles
 Delivered: September 1930