Late in 1949 with the engineering and tooling about 75% complete, three of the TE-1As redesigned
YT-35 were entered in the revived USAF trainer competition commencing in 1950. An evaluation program using students flying competing aircraft would be held at
Randolph Air Force Base. Following receipt of the USAF order, Temco decided that in addition to the extensive changes that had been made to the TE-1A, a Franklin engine would be installed. The USAF agreed to the change, with this model designated the
TE-1B and given the name “Buckaroo”. Development of the TE-1A and the TE-1B continued concurrently. The TE-1A was designated for export, and the TE-1B was for the USAF. One TE-1A was bought by the
Israeli Air Force and a second one was bought by the
Greek Air Force. In July 1950, the three
YT-35 Buckaroos were delivered to Randolph AFB to compete with the
YT-34 Mentor, the
Fairchild T-31,
Boulton Paul Balliol, and the
de Havilland DHC-1B Chipmunk trainers. Later in 1950, the
Korean War disrupted many U.S. military programs, including the YT-35 evaluation. The aircraft ended up at James Connally Air Force Base, now called
TSTC Waco Airport near
Waco, Texas. After 10 months of rigorous testing, the three YT-35s were returned to Temco in late July 1951, for factory overhaul. They then were assigned to
Goodfellow Air Force Base where later all three were sold as surplus. The majority of the TE-1Bs were sold to
Saudi Arabia (designated
T-35A) through the USAF under the
Mutual Defense Aid Program. Temco's contract with the Saudis called for ten T-35A aircraft and enough spares to keep them flying for years. The Saudi Arabian T-35A aircraft included two 30-caliber
machine guns, one mounted inside each wing and ten 2.75-inch
rockets, five mounted under each
wing. Both
Italy and
Israel bought a single TE-1B Buckaroo in 1948. In 1950, the Israeli aircraft was evaluated against the
Fokker Instructor and the
DHC-1 Chipmunk for possible use as a trainer with the IAF
flight school. Losing the competition, the single Buckaroo was retired in late 1950 or early 1951. ==Variants==