Model 45 may refer to: Model 45A, an experimental rifle developed by the U.S. Army in 1945. Beech Model 45, better known as the T-34 Mentor, an American basic training aircraft. Fairchild Model 45, an American utility aircraft of the 1930s. Firestone Model 45, better known as the XR-9, an American experimental helicopter of the late 1940s. Wedell-Williams Model 45, an American racing aircraft of the 1930s.