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Advise from Russ.

When I bought an aeroplane with a PT6 turbine engine, myself and 2 others attended a gas turbine engine course in Sydney. We stayed with a friend, Russ, who had flown big airliners most of his working life. Russ questioned why we attended such a course, for he could have told us how they worked thus saving us both the time and money. The air entered the front he said, turned a big wheel and blew out the rear.
Well poor old Russ could not have been more wrong. The PT6 the air enters the rear, turns a big wheel and exits the front. Go to the bottom of the class Russ.