{
  "$type": "site.standard.document",
  "description": "A gear reduction (104) reduces a speed of a fan rotor (106) relative to a speed of a fan drive turbine. A rigid connection between a fan case (108) and an inner core housing includes a plurality of A-frames (116) connected at a connection point (122) to the fan case (108). Legs in the A-frames…",
  "path": "/patents/1402069",
  "publishedAt": "2024-09-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01D25/24",
    "RTX CORP [US]"
  ],
  "textContent": "A gear reduction (104) reduces a speed of a fan rotor (106) relative to a speed of a fan drive turbine. A rigid connection between a fan case (108) and an inner core housing includes a plurality of A-frames (116) connected at a connection point (122) to the fan case (108). Legs in the A-frames (116) extend away from the connection point (122) in opposed circumferential directions to be connected to a compressor wall (111) of the inner core housing. The rigid connection also includes a plurality of fan exit guide vanes (114, 129) rigidly connected to the fan case (108). A lateral stiffness ratio of the lateral stiffness of the plurality of fan exit guide vanes (114, 129) and a lateral stiffness of a combination of the plurality of A-frame, the compressor wall (111), and a fan intermediate case (210) which is forward of the low pressure compressor (44, 112) being greater than or equal to 0.6 and less than or equal to 2.0.",
  "title": "FRONT SECTION STIFFNESS RATIO"
}