If you're interested in the Concorde, this thread on an aviation forum is incredible. Starts with a guy asking why there was no auxiliary power unit onboard, an

If you're interested in the Concorde, this thread on an aviation forum is incredible. Starts with a guy asking why there was no auxiliary power unit onboard, and shortly turns into a rolling conversation including original design engineers, pilots, flight engineers and cabin crew. Super entertaining! http://www.pprune.org/tech-log/423988-concorde-question.html http://www.pprune.org/tech-log/423988-concorde-question.html