4-х колёсный велосипед с карданной передачей на колёса.

Contes Engineering Athos Prototype Construction and Testing. This video shows everything from the birth of the Athos quad idea all the way through prototype testing. This video is geared towars the tech centric viewer that likes to see a great idea come to live and a little taste of each phase of the process. Watch closely and you will see the initial hand drawn sketh of the Athos quad concept, initial CAD modeling and simulation, actual prototype fabrication steps, and video of the first test rides.