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14th August 2001 | 18:23

#4 (permalink)

criticalmass

Joined: Apr 2000

Posts: 438

Likes: 3

From: South of YSSY

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.