Suggestions from my Turbine Engine Consultancy desk friends, (well those that are printable anyway) suggest that you may find it useful to give up on self study and invest some of your dosh in an Engines course at Kidlington (or similar). The RR book does (unfortunately) expect some prior knowledge in the field before you read it. Sorry to be a bringer of bad tidings,
MT
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If you don't know how it works....Fiddle 'til you do!