PARIS — Behind the locked doors of Nexter’s black room at Eurosatory is a demonstrator for a flexible rubber track for armored vehicles and a laboratory module for electronic architecture.

Nexter funded the work on the rubber track itself, a company spokeswoman said. The track would be proposed as a retrofit on existing vehicle fleets and for new-generation vehicles to aid mobility, she said.

The laboratory for integration of vectronics, also known by its French acronym LIVE, or vehicle electronic architecture, consists of a cabin with display screens for a single person and a vehicle crew cockpit. The cabin is used to try out the human-machine interface and test design concepts.

The black room is reserved for invited guests only at the Nexter pavilion. The XP2 concept armored vehicle was the main exhibit in the room at the 2010 edition of Eurosatory, but it was an open display at the current show, which opened June 11.