{
  "$type": "site.standard.document",
  "description": "A method of and system for operating a hybrid electric propulsion system (20) for an aircraft in a start sequence is provided. The hybrid electric propulsion system (20) includes a thermal engine (22), an electric motor (24), a gearbox (36), an electric power storage unit (26), and a propulsion…",
  "path": "/patents/1390924",
  "publishedAt": "2025-11-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B64C11/385",
    "PRATT & WHITNEY CANADA [CA]"
  ],
  "textContent": "A method of and system for operating a hybrid electric propulsion system (20) for an aircraft in a start sequence is provided. The hybrid electric propulsion system (20) includes a thermal engine (22), an electric motor (24), a gearbox (36), an electric power storage unit (26), and a propulsion unit (28) having a propeller (40) having propeller blades (40A). The method includes: driving the propeller (40) from a static state to a target rotational speed within a predetermined range of speeds using the electric motor (24); transitioning the propeller blades (40A) from a feathered mode to an unfeathered mode while the propeller (40) is being driven at the target rotational speed solely by the electric motor (24); starting the thermal engine (22); and transitioning the driving of the propeller (40) using the electric motor (24) to driving the propeller (40) using the thermal engine (22).",
  "title": "HYBRID ELECTRIC PROPULSION SYSTEM WITH START SEQUENCE AND SHUTDOWN SEQUENCE"
}