Good point about CF34's - the dash 3 (RJ100 & 200) is closely derived from the military TF34 - designed in the late 60's. It has 14 HP compressor stages, and 2 HP turbine stages.
The dash 8 (RJ700 & 900) is a fresh design with little commonality to earlier models. Improved aero design yields 9 HP compressor stages, 1 HP turbine stage. The LP system is all-new too.
The dash 10 (EMBRAER 190/195) is yet another go.
Last edited by barit1; 5th Jul 2005 at 13:41.