{
  "$type": "site.standard.document",
  "description": "A propulsion system (20) includes an open propulsor rotor (34), an open guide vane structure (36), a turbine engine (32) and a blade actuation system (48). The open propulsor rotor (34) includes a plurality of open propulsor blades (42). The turbine engine (32) includes a compressor section (65)…",
  "path": "/patents/1390046",
  "publishedAt": "2026-06-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B64C11/305",
    "RTX CORP [US]"
  ],
  "textContent": "A propulsion system (20) includes an open propulsor rotor (34), an open guide vane structure (36), a turbine engine (32) and a blade actuation system (48). The open propulsor rotor (34) includes a plurality of open propulsor blades (42). The turbine engine (32) includes a compressor section (65) and a rotating structure (86). The rotating structure (86) is operatively coupled to the open propulsor rotor (34). The rotating structure (86) includes a compressor rotor in the compressor section (65). The blade actuation system (48) is configured to adjust pitch of at least one of the open propulsor blades (42). A controller (110) is configured to control operation of the blade actuation system (48) during aircraft flight to tailor the pitch. The turbine engine (32) is configured to drive rotation of the open propulsor rotor (34) about the axis during a first mode of operation. The open propulsor rotor (34) is configured to windmill about the axis to drive rotation of the rotating structure (86) during a second mode of operation.",
  "title": "STARTING OPEN ROTOR PROPULSION SYSTEM DURING AIRCRAFT FLIGHT"
}