The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 1989
Filed:
Jun. 01, 1987
Jeffry K Kamenetz, Windsor, CT (US);
Howard E Simmons, Barkhamsted, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
Each engine of a multi-engine aircraft is monitored to determine if it has become inoperative during a critical flight mode such as takeoff or landing. If so, the propeller of the inoperative engine is feathered and the remaining engine or engines is uptrimmed. A 'state machine' indicative of the various states of the aircraft is established and the present state of the aircraft is stored in a non-volatile memory; if an electrical power interruption occurs during a critical flight mode the identity of the present operating state may be quickly recalled for immediate refeathering of an inoperative engine and reuptrimming of the remaining engine or engines.