Hiway, founded by John Ievers and Steve Hunt, first produced a standard Rogallo, in 1973.
Hiway decided to return to simplicity for a new range of gliders, with no wing wires. Hiway designed the airframe to fles in a particular way under flight loads, and then sew the sail to fit the shape exactly.
The first of the range were 1) Super Scorpion, a cross-country hang glider. 2) Spectrum, intermediate glider. 3) Gemini, purpose designed two-place glider. 4) Harrier, primary and training glider.