H-75 is a designation for a type of aircraft, specifically the Curtiss H-75, which is a variant of the Curtiss P-36 Hawk. It was primarily used during the late 1930s and early 1940s, serving in various air forces around the world. The H-75 was known for its agility and speed, making it a competitive fighter during its time. The aircraft was powered by a Pratt & Whitney R-1830 engine, which contributed to its performance in combat. The H-75 saw action in several conflicts, including World War II, and was utilized by countries such as France and China. Its design and capabilities made it a significant player in early aerial warfare.