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14th Aug 2001, 18:23

#4 (permalink)

criticalmass

Join Date: Apr 2000

Location: South of YSSY

Age: 72

Posts: 438

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Kermie,

As far as I am aware, it's mostly an aerodynamic thing although it may also cover the fasteners holding the fan-hub to the shaft, depending on how the engine manufacturer built the thing in the first place.