06/30/2009. Remarks by Johan Visschedijk: "Ordered on October 12, 1922, this trainer was delivered to the USAAS in 1923. Powered by a 200 hp Lawrence J-1 nine-cylinder air-cooled radial engine, the TA-6 had a span of 29 ft 4 in (8.94 m) and a length of 23 ft 6 in (7.16 m). It was tested at McCook Field, Ohio, USA, with Project Number 280, it was shipped to Brooks Filed, Texas, on April 8, 1924.
Following the tests, five aircraft (s/n 23-1211 to 23-1215) were ordered, designated TW-5, they were fitted with an 180 hp Wright-Hispano E eight-cylinder water-cooled V-engine. By the time another batch of ten aircraft (s/n 25-235 to 25-244) was ordered the TW-designation (Trainer Water-cooled) was dropped, and the ten were the first in the new Army Trainer class, hence they were designated AT-1. A single aircraft was tested as the single-seat AT-2."