US Patent Issued to RTX on Oct. 27 for "Preheating aircraft propulsion system fluid(s)" (North Carolina, Connecticut, Maine Inventors)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,665, issued on Oct. 27, was assigned to RTX Corp. (Farmington, Conn.).

"Preheating aircraft propulsion system fluid(s)" was invented by John Akin (Charlotte, N.C.), Thomas E. Clark (Wells, Maine) and Jung Muk Choe (Glastonbury, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft powerplant includes a turbine engine, a first fluid system, an electric machine system, a second fluid system, a heat exchanger and a control system. The first fluid system directs a first fluid through the first fluid circuit using a first fluid pump to service engine components during a warmup mode. The electric machine system includes an electric machine conf...