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:
Apr. 07, 2009
Filed:
Feb. 03, 2005
Edward Zielinski, Seattle, WA (US);
Alan T. Bernier, Seattle, WA (US);
Kent W. Knechtel, Seattle, WA (US);
Thomas A. Campbell, Seattle, WA (US);
Jeffrey J. White, Seattle, WA (US);
Mark D. Ralston, Seattle, WA (US);
Edward Zielinski, Seattle, WA (US);
Alan T. Bernier, Seattle, WA (US);
Kent W. Knechtel, Seattle, WA (US);
Thomas A. Campbell, Seattle, WA (US);
Jeffrey J. White, Seattle, WA (US);
Mark D. Ralston, Seattle, WA (US);
The Boeing Company, Chicago, IL (US);
Abstract
Methods and systems for starting aircraft turbofan engines are disclosed. A system in accordance with one embodiment includes an electrically-powered starter motor coupled to a turbofan engine to provide power to the turbofan engine during an engine start procedure. The system can further include an on-board, deployable, ram air driven turbine coupled to an electrical generator, which is in turn coupled to the starter motor to provide electrical power to the starter motor. In other embodiments, the ram air driven turbine can be replaced with a fuel cell or a battery. In still further embodiments, a single controller can control operation of both the engine starter and other motors of the aircraft.