Sparrow is one of the "hero ships" of THE EXTRAPOLATED MAN. A hyperglider operates in a manner analogous to an atmospheric glider, albeit in four dimensions rather than three.

An early warpship in 1/500 scale with three illuminated warp drives, a shuttle with lit portholes, and a blinking deflector on the bow.

Occam's Razor is a 1980s-era concept model of an interplanetary turbojet. The octagonal core generates an electromagnetic impeller field that pulls in hydrogen ions and fuses them for power and thrust.

The organic ramjet is a concept model of a deep space lifeform that employs a Bussard ramjet for locomotion.