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Originally Posted by JG52Krupi
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Very interesting indeed!
The B-17G (SN 44-85734) did not see combat in World War II, and was originally sold on June 25, 1947 as scrap to Esperado Mining Co. of Altus, OK; it was then sold again later that year for $2,700 to Pratt & Whitney, who operated the B-17 from November 19, 1947 to 1967 as a heavily modified test bed for their P&W T34 turboprop engine under the registration N-5111N. Similar to registration numbers 44-85747 and 44-85813,
it became a five-engined aircraft, having the prototype engine mounted on the nose. The aircraft was flown single-engine, with all four radial engines feathered during test flights.