{
  "$type": "site.standard.document",
  "description": "A system for changing a speed ratio between a compressor boost stage (12) and at least one power turbine (16) of a gas turbine engine (10) comprises a coupling device (20) configured to selectively transmit energy from the at least one power turbine (16) to the boost stage (12) according to at…",
  "path": "/patents/984895",
  "publishedAt": "2013-06-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C7/36",
    "PRATT & WHITNEY CANADA [CA]"
  ],
  "textContent": "A system for changing a speed ratio between a compressor boost stage (12) and at least one power turbine (16) of a gas turbine engine (10) comprises a coupling device (20) configured to selectively transmit energy from the at least one power turbine (16) to the boost stage (12) according to at least a first speed ratio and a second speed ratio. The system also comprises an auxiliary power device (22, 26) configured to cause a rotational speed of the boost stage (12) to change from a first speed corresponding substantially to the first speed ratio to a second speed corresponding substantially to the second speed ratio when the boost stage (12) is decoupled from the at least one power turbine (16).",
  "title": "Systems and Methods for Changing a Speed of a Compressor Boost Stage in a Gas Turbine"
}