If I may, two other RATty questions:
1) Presuming that, upon double engine failure, deployment of the RAT is automatic: From failure - how long before it pops out of it's hole and provides juice?
2) Is there a max operating speed for the RAT, whereby it will not deploy until IAS has dropped? Come to think of it, if the systems have all failed it might mean that the ability to relate IAS to deplayoment is not available.
Any more dumb questions like that and I can see me being sent to the back row of Y, next to the galley.