Warplanes of the USA: de Lackner HZ-1 Aerocycle, US Army
de Lackner HZ-1 Aerocycle (U.S. Army Photo) de Lackner HZ-1 Aerocycle. The HZ-1 Aerocycle, also known as the YHO-2 and by the manufacturer’s designation DH-5 Aerocycle, was an American one-man “personal helicopter” developed by de Lackner Helicopters in the mid-1950s. Intended to be operated by inexperienced pilots with a minimum of 20 minutes of instruction,[1] … Read more