Gerrit, e-mail, 22.07.2021 23:32 The fuel consumption, and noise created by ramjets, and other tip-jet designs, have precluded their use in more recent helicopter designs in spite of their considerable advantages. The goal of the affordable personal helicopter continues to be an elusive goal. The Hiller Hornet and its developments came close to delivering on their promise for simple, safe, cheap, and easy to fly aircraft, but they could not give the appearance of being anything more than an interesting experiment.

All the World's Rotorcraft

Virtual Aircraft Museum

Sights of Estonia