{
  "$type": "site.standard.document",
  "description": "A turboshaft engine (10) for use in an aircraft, includes a spool (14) having a turbine (18) and a gas generator compressor (20) mounted thereto, a source of heat (22) positioned between the turbine (18) and the compressor (20), a first shaft (12) and a free turbine (24) mounted to the first shaft…",
  "path": "/patents/1001341",
  "publishedAt": "2012-06-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01D15/10",
    "UNITED TECHNOLOGIES CORP [US]"
  ],
  "textContent": "A turboshaft engine (10) for use in an aircraft, includes a spool (14) having a turbine (18) and a gas generator compressor (20) mounted thereto, a source of heat (22) positioned between the turbine (18) and the compressor (20), a first shaft (12) and a free turbine (24) mounted to the first shaft (12), a free compressor (40) driven by a second shaft (42), and a control system (30) for transferring power between the spool (14) and the first shaft (12). The operating speed of the gas generator compressor (20) is re-matched in order to improve the efficiency and surge margin of the gas generator compressor (20) and to improve the transient performance of the turboshaft engine (10).",
  "title": "Electrically coupled supercharger for a turboshaft engine"
}