Takeoff power management system and method for gas turbine engines

Patent metadata

Field	Value
Publication number	US-2017267366-A1
Application number	US-201615072869-A
Country	US
Kind code	A1
Filing date	Mar 17, 2016
Priority date	Mar 17, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a control unit to command the gas turbine engine to perform one of a rolling takeoff procedure and an unrestricted takeoff procedure. The control unit is configured command the gas turbine engine to perform the rolling takeoff procedure when information required to determine whether the unrestricted takeoff procedure can be performed is unavailable to the control unit.

First claim

1 . A gas turbine engine, comprising:
a control unit to command the gas turbine engine to perform one of a rolling takeoff procedure and an unrestricted takeoff procedure, wherein the control unit is configured command the gas turbine engine to perform the rolling takeoff procedure when information required to determine whether the unrestricted takeoff procedure can be performed is unavailable to the control unit.

2 . The gas turbine engine as recited in claim 1 , wherein, when the information is available to the control unit, the control unit is configured to initiate the rolling takeoff procedure if the information exceeds a predetermined threshold value.

3 . The gas turbine engine as recited in claim 1 , wherein the information includes a ground wind speed.

4 . The gas turbine engine as recited in claim 3 , wherein the ground wind speed is a cross-wind speed.

5 . The gas turbine engine as recited in claim 1 , wherein, following initiation of the rolling takeoff procedure, the control unit is configured to power the gas turbine engine to full power after running at intermediate power for a period of time.

6 . The gas turbine engine as recited in claim 5 , wherein the period of time includes a period of time to allow the ground speed of an aircraft to reach a predetermined ground speed.

7 . The gas turbine engine as recited in claim 6 , wherein the control unit is configured to determine the ground speed by integrating the acceleration of the aircraft relative to the time since initiation of the rolling takeoff procedure.

8 . The gas turbine engine as recited in claim 7 , wherein the initiation of the rolling takeoff procedure is indicated by a release of a brake of the aircraft.

9 . The gas turbine engine as recited in claim 1 , wherein the unrestricted takeoff procedure is a static takeoff procedure and includes powering the gas turbine engine to full power before accelerating an aircraft.

10 . The gas turbine engine as recited in claim 9 , wherein the rolling takeoff procedure includes accelerating the aircraft while running the gas turbine engine at an intermediate power for a period of time before running the gas turbine engine at full power.

11 . The gas turbine engine as recited in claim 10 , wherein full power is a level of power capable of allowing the aircraft to takeoff.

12 . A method, comprising:
initiating a rolling takeoff procedure when information required to determine whether an unrestricted takeoff procedure can be performed is unavailable to a control unit.

13 . The method as recited in claim 12 , further comprising:
initiating a rolling takeoff procedure when the information is available to the control unit and the information exceeds a predetermined threshold value.

14 . The method as recited in claim 12 , wherein the information required to determine whether the unrestricted takeoff procedure can be performed includes a ground wind speed.

15 . The method as recited in claim 12 , wherein the rolling takeoff procedure comprises:
accelerating an aircraft by running a gas turbine engine at an intermediate power for a period of time; and accelerating the aircraft by running the gas turbine engine at full power after the period of time.

16 . The method as recited in claim 15 , wherein the period of time is a time to allow the aircraft to reach a predetermined ground speed.

17 . The method as recited in claim 12 , wherein the unrestricted takeoff procedure is a static takeoff procedure.

18 . The method as recited in claim 12 , further comprising coordinating operation of a plurality of gas turbine engines to prevent thrust asymmetry.

Assignees

• United Technologies Corp

Inventors

• Feulner Matthew R
• Walther Ronald S

Classifications

• B64D31/06 Primary

  actuated automatically · CPC title

• F02C9/28 Primary

  Regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed (F02C9/30 - F02C9/38, F02C9/44 take precedence) · CPC title

• G05D1/0661

  specially adapted for take-off · CPC title

• B64D27/10

  of gas-turbine type  (jet aircraft B64D27/16) · CPC title

• B64D31/12

  for equalising or synchronising power plants · CPC title