Hughes OH-6 – Cost: $500,000
The Hughes OH-6 Cayuse does observational operations, personnel transport, plus escort and attack missions. It is a light helicopter with a single-engine and a four-bladed main rotor. The United States Army issued technical specifications for a light helicopter they wanted in 1960. The Oh-6 entered U.S. service in 1966 and quickly broke 23 world records.