The Savoia-Marchetti SM.81 is an Italian transport aircraft that first flew in 1934. Designed for military and civilian use, it features a high-wing configuration and a tri-motor layout, allowing it to carry cargo and passengers effectively. The aircraft was primarily used during World War II for troop transport and supply missions. With a maximum speed of around 300 km/h and a range of approximately 1,500 kilometers, the SM.81 was versatile in various roles. It served in several air forces, including the Regia Aeronautica, and was known for its reliability and performance in challenging conditions.