In article <fetqfctc3t123673rdknds01hjlvuv374r@4ax.com>, joet5 says...
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Someone as one at Gnoss Field in Marin County...about every three weeks, if the
weather is good, he takes it up for an hour or so. Not sure which model...13 or
17...has the tradition Army trainer colors of blue/yellow.
https://en.wikipedia.org/wiki/Boeing-Stearman_Model_75
Variants
The U.S. Army Air Forces Kaydet had three different designations based on its
power plant:
PT-13
with a Lycoming R-680 engine. 2,141 total all models.
PT-13 Initial production. R-680-B4B engine. 26 built
PT-13A R-680-7 engine. 92 delivered 1937-38. Model A-75
PT-13B R-680-11 engine. 255 delivered 1939-40.
PT-13C Six PT-13Bs modified for instrument flying.
PT-13D PT-13As equipped with the R-680-17 engine. 353 delivered. Model E-75.
PT-17
With a Continental R-670-5 engine. 3,519 delivered
PT-17A 18 PT-17s were equipped with blind-flying instrumentation.
PT-17B Three PT-17s were equipped with agricultural spraying equipment for
pest-control.
PT-18PT-13 with a Jacobs R-755 engine, 150 built. PT-18A Six PT-18s fitted with
blind-flying instrumentation.
PT-27Canadian PT-17. This designation was given to 300 aircraft supplied under
Lend-Lease to the RCAF.
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