The original concept was drafted as a lookalike phone-booth based on the General Post Office's K8 design in the UK, the notion being that we were approaching a time when ~ as in TV series like Doctor Who and Star Trek ~ we might simply enter a form of flying street-furniture and punch a zip code in order to be 'teleported' to the required destination.

As such the draft was entered for the second phase of the Boeing-sponsored GoFly competition, featuring a full-height 'phone-booth' suspended between super-sized quadcopters at both the base and dome.

Subsequently the restrictive dimensions allowed within the competition meant that the effort had to be scaled down, and combined with the logistics of crossing an ocean and a continent, a two-third scale iteration would appear at the third (and then final) phase of the competition in the USA.

This took the form of an accommodation box of reduced height in which a passenger could be seated, as in the litter or 'sedan chair' of times past, albeit with an electrical twist.

In order to field an airframe able to support an adult for the ongoing competition, however, a new approach was adopted where the flight compartment formed an open-topped box: "More of a flying wheelie-bin than a flying phone-box...".

This final prototype (although it will eventuially be extended once more to full-height so as to fulfil the original dream) is formed of alloy sections and sheet, reinforced by core foam and supporting eight U13 motors and 32-inch propellers.

Each of its quadcopters will in time be wholly independent so that the airframe consist of just three separate parts able to be joined as modules, so that for example various types of passenger (or cargo) container can be swapped out.