Three shafts: the basics

1996-09-11T00:00:00

Most turbofans have a low- and high-pressure spool, whereas the R-R engines have three: a high, intermediate and low spool. R-R believes that this is more advantageous because each spool can be better optimised aerodynamically and, therefore, works more efficiently. The fan and booster run together on the LP spool ...

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