Launched at the Paris Air Show on June 26, 1995, its major assembly started in March 1997 and its body was joined on July 21, it was rolled-out on September 8 and made its first flight on October 16. The 777 was designed to be stretched by 20%: 60 extra seats to almost 370 in tri-class, 75 more to 451 in two classes, or up to 550 in all-economy like the 747SR. The stretch is done with in ten frames forward and in nine frames aft for a length, longer than the 747-400. It uses the -200IGW fuel capacity and engines with a MTOW.