commercial Engine TURBOFAN 3 shaft

K

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kok

I want to know in a high bypass turbofan engine like GE or RR how LP turbine drive big fan in head of engine? as know LP turbine has separate shaft from HP turbine, so how 2 shaft connect to each other? do LP shaft mounted within HP shaft OR both shaft installed in side and close to each other?

for a 3 shaft engine how is arrangement of shafts?
are 3 shaft parallel and closed to each other?
 
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