If you ever get the chance to see a ground checkout of a RAT , my advise is run the other way !!!!. .After deploying the RAT you then backdrive it using Hydraulic pressure and check if it runs up to constant speeding by way of a LED light module.. .To do this you are standing some 2-3 feet away fom those whirling blades !........should add that the correct proceedure is to fit a cage around the RAT first ! I believe that there has been a few blade failures during testing (gulp)