I was trying to paint a picture of why the RAT is needed, in order to share my admiration about the people who build it. I don't know exactly which systems it

I was trying to paint a picture of why the RAT is needed, in order to share my admiration about the people who build it. I don't know exactly which systems it powers, but have been told that in the case of engine failure, the plane cannot fly without it. You may be correct about the specifics.