Back in September I reported about how NASA was considering an electromechanical actuator and provided the schematic above of a system considered in 1993 and now people are wondering about what design Ares will use as the agency identified it as the solution to the lift-off drift of the Ares I crew launch vehicle
NASA told me in September; "Because [the electromechanical actuator] has the potential to reduce operations costs in the long run. [It is a] technology study effort at this point. If we did, we would likely do as a downsteam upgrade."
I guess that would go along with the nozzle extension upgrade for lunar missions. However things looked bleaker for the EM TVC when NASA announced this on 1 October
"This...is intended to notify industry that the agency is still refining its requirements for the Ares Electric TVC Prototype Risk Reduction Procurement based upon consideration of industry comments and agency reviews. As such, the release of the final RFP will be postponed until further notice"
The final RFP was to be released on 1 October. The draft RFP can be found here