Gyro 2000
Ikenga 530Z

In the early 1980s, David Gittens, a gifted artist and industrial designer, began work on an innovative, low-cost gyroplane that could transport medical personnel and needed equipment to remote villages in the poorer nations of the world. Unfortunately, potential buyers were more interested in the less peaceful applications of the Ikenga, and Gittens had to abandon his goal of a "future link" connecting stricken areas with the wider world.

Source: Smithsonian Air & Space Museum