ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,917, issued on Aug. 26, was assigned to ROLLS-ROYCE plc (London).
"Gas turbine engine compression system with core compressor pressure ratio" was invented by Gareth M Armstrong (Nottingham, Great Britain) and Nicholas Howarth (Derby, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gas turbine engine has a compression system radius ratio defined as the ratio of the radius of the tip of a fan blade to the radius of the tip of the most downstream compressor blade in the range of from 5 to 9. This results in an optimum balance between installation benefits, operability, maintenance requirements and engine efficiency when the gas turbine e...