3 pp
Hiller began to develop his vision for giant flying cranes, utilizing tip-mounted ramjets or jet turbines, by developing a simple version that could be sold as an affordable aircraft for the masses that was small, lightweight, easy to fly and maintain, transportable, and above all else, cheap. In 1948, Hiller began work on the HJ-1 Hornet single-seat sport helicopter. The most difficult challenge
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