The sail blades stow as rolls and attach to a central core structure through thin-walled aluminum struts.  The struts and blade rolls fold up and register on holes on a sliding ring. Moments after separation from the launch vehicle, the ring slides, releasing the blade roll supports.  Then, the sail and stowage vehicle spin up to 60 rpm. A release device keeps the stowage vehicle and the core together until then, after which they separate and the blades slowly unroll.