The V-1650 Series refers to a line of aircraft engines developed during World War II, specifically designed for military aircraft. These engines were known for their reliability and performance, contributing to the effectiveness of various fighter planes used in combat. One notable variant of the V-1650 Series is the V-1650-1, which powered the P-51 Mustang, a prominent American fighter aircraft. The V-1650 engines were based on the Rolls-Royce Merlin design, allowing for enhanced speed and maneuverability in aerial warfare.