Ryan ST Production History

The Ryan Engineering Office

Designer            T. Claude Ryan
Chief Engineer      Millard C. Boyd
Engineer/Draftsman  Will Vandermeer
Test Pilot          John Fornasero




L to R: Fornasero, TC Ryan, Boyd and Vandermeer

Photo: Ryan Aeronautical

 In 1936 the factory workforce consisted of 27 men who produced
slightly more than one ship every other week.

Production by Year

Year    Model          Quantity
1934    ST                  1

1935    ST                  2
        ST-A                6
        ST-B                1

1936    ST                  1
        ST-A               27
        ST-A Special        1

1937    ST                  1
        ST-A               34
        ST-A Special        5
        STM  (Mexico)       6

1938    ST-A                2
        ST-A Special        3
        STM  (Honduras)     3
        STM  (Guatemala)   12
        STM  (Equador)      1

1939    ST-A                4
        ST-A Special        1
        PT-16              15
        PT-20               1

1940    STM-2E (China)     48
        STM-2P (China)      2
        STM-2  (NEI Army)  40
        STM-2  (NEI Navy)  17
        STM-S2 (NEI Navy)  13
        PT-20              29
        PT-20A              1	
        ST-3                2

1941    STM-2  (NEI Army)  20
        STM-2  (NEI Navy)  18

Total Production by Model

Model       Quantity
ST               5
ST-A            73
ST-B             1
ST-A Special    10
STM             22
STM-2E          48
STM-2P           2
STM-2           95
STM-S2          13
PT-16           15
PT-20           29
PT-20A           1
ST-3             2				

Total Production by Year

Year  Quantity
1934     1
1935     9
1936    29
1937    46
1938    21
1939    21
1940   150
1941    38

Total: 317 (includes ST-3)

Modifications Performed by Ryan

Modification        Quantity
ST-A  to PT-16           1
PT-16 to ST-W            1
PT-16 to PT-16A         14
PT-20A to ST-W           1	
PT-20 to PT-20B          2
PT-20B to PT-20A         2
PT-20 to PT-20A         26

Major Production Changes

Flap Inboard Edge Moved
Was: 6 inches from fuselage  101 thru 119
 Is: Interface with stubwing 120 and up

Flap Actuation Changed
Was: Hand Crank              101 thru 117
 Is: Handle                  118 and up

Tail Wheel Strut
Was: Trombone Type           Original
Was: Option for Oleo Strut   Effectivity Unknown
 Is: Oleo Strut Standard     Effectivity Unknown

Steerable Tailwheel
Added                        Effectivity Unknown

Tail Wheel Swivle Lock
Added                        Effectivity Unknown