I was noticing how for the GEnx-2b67, Boeing installed thrust (Boeing equivalent thrust?) is 66,500 lbs. GE rates the engine at 67,400 lbs.
Obviously, installed thrust is going to be less than for a bench test engine, BUT, how come Boeing installed/equivalent thrust for the CF6-80c2b8f on the 764 is 63,500 lbs and GE says it is only 62,100 lbs?
And for the PW4062 Boeing equivalent/installed thrust is 63,300 vs Pratt's info stating 62,000 lbs?
Makes me wonder if the GEnx nacelle chevrons actually reduce thrust slightly...