I am sick and tired of idiots such as Genghis, so this is the last time I read or post here in PPRuNe, have a nice life.
Chickenhouse, whilst Ghengis can be an annoying tit at times and on occasion does post on Instructional matters with the same authority you seem to have taken up on aircraft engineering I can assure you that when it comes to a pissing contest on such matters you are not even qualified to get into the ring with him.
So perhaps relax a bit and learn from him?