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:
Jan. 05, 2021
Filed:
Jan. 13, 2020
Applicant:
Rolls-royce Plc, London, GB;
Inventors:
Richard G. Stretton, Ashby-da-la-Zouch, GB;
Michael C. Willmot, Sheffield, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C 7/04 (2006.01); B64D 33/02 (2006.01); B64D 27/12 (2006.01); F02K 3/06 (2006.01);
U.S. Cl.
CPC ...
B64D 33/02 (2013.01); B64D 27/12 (2013.01); F02C 7/04 (2013.01); F02K 3/06 (2013.01); B64D 2033/0286 (2013.01); F05D 2200/00 (2013.01);
Abstract
A gas turbine engine of an aircraft includes: an engine core having a turbine including a lowest pressure rotor stage, a turbine diameter, a fan including a plurality of fan blades extending from a hub, an annular fan face at a leading edge of the fan; wherein a downstream blockage ratio of: is in the range from 0.2 to 0.3.