Flight 11 which crashed into the north tower was a Boeing 767-223ER. Flight 175 which crashed into the south tower was a Boeing 767-222.
Qantas are the only airline that fly the 747 400er
777 is bigger than a 737. from smallest to largest 737, 757, 767, 777, 747 It goes like this (from small to big) 737, 757, 787, 767, 747, 777
All of those Boeing aircraft are twin jet except the 747 which has 4.
Boeing is working on two new aircraft: 1) The Boeing 787-size between the 767 and 777 2) The Boeing 747-8-a newer bigger version of the 747-400 They are working very hard to deliver as many aircraft as possible.
As of April 2018 (time of answer - No. They have Airbus A321 Airbus A330 Airbus A340 Boeing 747 Boeing 767 Boeing 787 Dreamliner
The Boeing 777 is the next evolution in aircraft design. It was meant to fill the gap left in the Boeing lineup between the smaller 767, and the larger 747. it competes directly with Airbus' A340 family, and the higher capacity range A330.
The Boeing 767-400ER is one of the varients of the Boeing 767. It is essentially a stretched Boeing 767-300ER. The "ER" bit stands for Extended Range.
A Boeing 767 has 3,100,000 parts.
The Maximum Take-Off Weight for a Boeing 747-100 is 333, 390kg; a Boeing 747-200 and 747-300 is 377,842kg; a Boeing 747-400 is 396,890kg; a Boeing 747-400ER is 412,775kg and the Boeing 747-8I is 442,253kg.
747
Boeing created the Boeing 747.