The OP's intent here might be more of a 'pop-out pitot' solution, that extends similar to the RAT, not the RAT itself? On modern jets like the A350, the solution has practically been solved by utilising multiple sources of static and dynamic pressure from both traditional probes, multi-function probes, engine sensors and GNSS, with automatic switching. If it weren't for cockpit alerts, generally, the loss of these systems would be transparent to the crew.