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DUAL-USE AIR TURBINE SYSTEM FOR A GAS TURBINE ENGINE

  • US 20170327235A1
  • Filed: 05/13/2016
  • Published: 11/16/2017
  • Est. Priority Date: 05/13/2016
  • Status: Active Grant
First Claim
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1. A dual-use air turbine system for a gas turbine engine of an aircraft, the dual-use air turbine system comprising:

  • a variable area air turbine mechanically linked to a spool of the gas turbine engine through a multi-speed gear set; and

    a plurality of valves in pneumatic ducting operable to direct an engine start air flow through an inlet of the variable area air turbine and drive rotation of the spool during an engine start mode of operation, wherein the valves are further operable to direct an engine bleed air flow from a compressor section of the gas turbine engine through the inlet of the variable area air turbine and drive rotation of the spool during an environmental control system active mode of operation.

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