It was quite a sight to see when GE
strapped one of their GE
-90's on a 747 testbed during testing. The engine looked like it was scraping the ground. During the century of flight exhibit in Rockefeller Center, their was a little area for the GE
-90, showing video of the 747 with the engine attached. The engine was so powerful, it was ripping chunks of sod up beyond the runway when the plane revved up for takeoff. They also had a real GE
-90 there (or at least it looked like one, it could have been a model), and you really don't appreciate how truly big one of those are until you get up close like that.