{
  "$type": "site.standard.document",
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  "description": "Gas turbine engines 101, 601, 701 and methods of starting gas turbine engines are provided. One such gas turbine engine 101, 601, 701 comprises: an electronic engine controller 204; one or more spools, one of which is designated a starting spool for starting the engine, and which has a required…",
  "path": "/patents/1413567",
  "publishedAt": "2024-01-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C7/268",
    "ROLLS ROYCE PLC [GB]"
  ],
  "textContent": "Gas turbine engines 101, 601, 701 and methods of starting gas turbine engines are provided. One such gas turbine engine 101, 601, 701 comprises: an electronic engine controller 204; one or more spools, one of which is designated a starting spool for starting the engine, and which has a required starting torque τs; a permanent magnet alternator 202 mechanically coupled with the starting spool, the alternator 202 being configured to, in a motor mode, provide a peak torque of τa, and, in a generator mode, generate electrical power for the electronic engine controller 204; and an electrical starter-generator 203 mechanically coupled with the starting spool. The starter-generator 203 is configured to, in a motor mode, provide a peak torque of τsg, and, in a generator mode, generate electrical power for an external load. τsg + τa ≥ τs and τsg, τa < τs, and the electronic engine controller 204 is configured to, during a start procedure, operate both the permanent magnet alternator 202 and the starter-generator 203 in a motor mode to drive the starting spool.",
  "title": "GAS TURBINE ENGINE"
}