Next round is on you
RPM at N1 100% is 2355 rpm
http://www.easa.europa.eu/ws_prod/c/...GE90_E_002.pdf
Not sure about the exact N1 fan diameter, but 4-5000 rpm would
probably make the GE90 N1 fan tip exceed the speed of sound.
XPM
Last edited by XPMorten; 4th Jun 2008 at 16:40.