BTW I have been researching the development of the afterburning Adour for a project, had have got hold of the Jaguar files available from the National Archives.. Interesting reading on all the development issues with the afterburner, PTR requirement, Flame tube coking,HP compressor drum failures, reheat buzz, low RPM surging... All the problems associated with sticking a burner on a little turbofan for the first time. Spey had similar problems one is lead to believe. And all of this in a collabrative project with design, production and test centres hundreds of miles apart in countries speaking different languages. It didn't help that Rolls Royce went bust inbetween! It didn't help Rolls Royce either that the trainer the engines originally were designed for, slowly wasn't a trainer anymore, but airframes carrying out most of the roles the trainer was designed to be training crew up to, plus a large percentage in increased basic mass and stores carriage weight..
