Thrust From United States of America, joined Sep 2003, 2691 posts, RR: 9
Reply 1, posted (11 years 5 months 2 weeks 3 hours ago) and read 3200 times:
Good question. Beyond my capability of answering in terms of sheer size. It's definently been proven the bigger the fan, the greater the thrust (usually). I don't know for sure if the 744ER just has more powerful engines or has the GE engines for the standard 747-400. (GE engines have to be the most powerful available on the 744, or else they would not be the only engines offered for the 744ER). I don't know always if an engine has to just be slightly modified or increased in size to generate a slight difference in thrust (say, 2,000 lbs. more per engine). I'm not sure if size plays a gigantic factor in this role. I also do not know the thrust of the GE engines on the 744ER, which makes it even more difficult for me to answer this.