Originally Posted by
Lighteningspeed
I agree with most of what you are saying except CRJ900 and E175s do not have same engines. CRJ900 NWA ordered for us is an enhanced NextGen version that has 19,450 lbs thrust per side where as E175 only has about 14,500 lbs thrust per side and E175 is heavier and has more drag because it is wider and has engines mounted under the wings. CRJ900 can outclimb and is definitely faster, but is only about 15% more fuwel efficient, I believe. 30% seems little too high.
Plus, if you re-read your statement here, how could the 900 be 15% more fuel efficient than the E175 while putting out 10K lbs more thrust (read, fuel flow) than the E175 when the 175 is heavier?