Hacker News with Generative AI: Prototypes

Barrel-rotor flying car prototype begins flight testing (newatlas.com)
One of the most fascinating aircraft in the eVTOL space has moved into flight testing with a new large-scale prototype. Cyclotech's Blackbird airframe becomes the world's first aircraft to fly with six barrel-shaped "Cyclorotors" for propulsion.
Zinc, a systems programming language prototype (sr.ht)
Zinc is my attempt at a low-level systems programming language prototype.
Boom Supersonic's XB-1 prototype aces 2nd test flight (space.com)
The Commodore 900: A Look at a Rare Prototype (hackaday.com)