US Patent Issued to SAFRAN, Safran Helicopter Engines on Feb. 3 for "Aircraft propulsion system with start-up control device" (French Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,577, issued on Feb. 3, was assigned to SAFRAN (Paris) and Safran Helicopter Engines (Bordes, France).

"Aircraft propulsion system with start-up control device" was invented by Antoine Pierre Emmanuel Ferrand (Moissy-Cramayel, France) and Fabien Mercier-Calvairac (Moissy-Cramayel, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A propulsion system includes a gas turbine designed so that a combustion chamber can be ignited in a first ignition range of rotational speeds of a compressor shaft. The system further includes a control device designed to control an electric starter to accelerate the compressor shaft and, when the compressor shaft is acc...