Model 45

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.