UH10B

The UH10B, also known as the XH-20, was an experimental American helicopter developed by Hiller Aircraft. It was designed as a single-seat observation and liaison aircraft during the early 1950s. The UH10B featured a distinctive two-bladed rotor system powered by a small, horizontally opposed piston engine. Its fuselage was compact and open, providing the pilot with excellent visibility, a key requirement for observation missions. The aircraft was intended to be highly maneuverable and capable of operating from unimproved landing sites.

Development of the UH10B began in the early 1950s, with the first prototype flying in 1956. The project aimed to explore the potential of compact, lightweight helicopter designs for military applications. While the UH10B demonstrated some promising characteristics, particularly in terms of its agility and simplicity, it ultimately did not enter widespread production. Its design was considered somewhat rudimentary compared to other contemporary helicopter developments. Only a small number of prototypes were built. The program was eventually terminated, with the lessons learned from the UH10B contributing to later Hiller designs.