Patent ID: 8840373

Claim:
A gas turbine engine rotor adapted for rotation about a longitudinal axis thereof, comprising: a plurality of blade supporting disks mounted by longitudinally compressive preloaded retention in a longitudinal stack: a first disk comprising a medial web and an annular rim disposed at a radial outer portion of said medial web, said web having forward and aft surfaces which, with adjacent radially inner surfaces of said rim, define a pair of major surfaces of said first disk; a second disk adjacent said first disk and separated therefrom by a gap, said second disk comprising a medial web and an annular rim disposed at a radial outer portion of said medial web, said web having forward and aft surfaces which, with adjacent radially inner surfaces of said rim, define a pair of major surfaces of said second disk; said first disk including in a first major surface thereof, and a first recess; said second disk including in a first major surface thereof opposing said first major surface of said first disk, and a second recess; and a spacer having first and second ends received in said first and second recesses respectively of said first and second disks; said spacer spanning said gap and transmitting said compressive preloading from one of said first and second disks to the other of said first and second disks; wherein said first disk rim includes a first shoulder at an edge thereof and a first flange extending longitudinally from said first shoulder of said first disk toward said first major surface of said second disk.