Thanks Craig. Been to the wiki page but cannot remember seeing that diagram, even though it was added Feb 07 already.
Make fully sense now. I'm just wondering why they did not just say that the bypass air in AB mode produces the thrust. Maybe to confuse the former USSR spies, but then looking at the Manhattan project their best spies were inside the project so accurate data would have been in Moscow 2 weeks after design.
Do you have any book recommendations on the SR71? I have two of the earlier works (can't remember names now) but that was written before the planes were withdrawn from service and classified data was released. Amazon about 4 months ago recommended a book written by a former pilot to me, but I'm more interested in the systems than flying experiences over Russian.