US 11,674,411 B2
Multi-engine coordination during gas turbine engine motoring
Subhradeep Chowdhury, Rocky Hill, CT (US); David M. Bostwick, East Hartford, CT (US); David Gelwan, West Hartford, CT (US); and Frederick M. Schwarz, Glastonbury, CT (US)
Assigned to RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Jun. 28, 2021, as Appl. No. 17/359,894.
Application 17/359,894 is a division of application No. 15/656,444, filed on Jul. 21, 2017, granted, now 11,047,257.
Claims priority of provisional application 62/365,093, filed on Jul. 21, 2016.
Prior Publication US 2021/0324758 A1, Oct. 21, 2021
Int. Cl. F01D 19/02 (2006.01); B64D 27/12 (2006.01); B64D 41/00 (2006.01); F02C 9/00 (2006.01); B64F 1/36 (2017.01); F01D 25/34 (2006.01); F02C 3/04 (2006.01); F02C 6/20 (2006.01); F02C 7/277 (2006.01)
CPC F01D 19/02 (2013.01) [B64D 27/12 (2013.01); B64D 41/00 (2013.01); B64F 1/364 (2013.01); F01D 25/34 (2013.01); F02C 3/04 (2013.01); F02C 6/20 (2013.01); F02C 7/277 (2013.01); F02C 9/00 (2013.01); B64D 2041/002 (2013.01); F05D 2220/323 (2013.01); F05D 2220/50 (2013.01); F05D 2260/85 (2013.01); F05D 2270/303 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for multi-engine coordination of gas turbine engine motoring in an aircraft, the system comprising:
a controller configured to:
determine a motoring mode as a selection between a single engine dry motoring mode and a multi-engine dry motoring mode based on at least one temperature of a plurality of gas turbine engines, wherein the at least one temperature is used to determine current conditions of the gas turbine engines and select a multi-engine dry motoring envelope to identify a multi-engine dry motoring capability that indicates whether a dry motoring threshold speed can be reached by the gas turbine engines at the same time; and
initiate dry motoring based on the motoring mode.