btw the plane with the two groups of engines right next to each other (total of four engines) was a modified boeing 747 used for movies. Its registration number isn't a valid number for a commercial jet. The plane's slangish name is the "Boeing 747-XXX"
A few points...
1. There is a lot of surface are on the planes wings.
2. With the flaps extended the plane would not only have more drag but also have more lift.
3. There was a lot of space between the plane and the runway. about 40 feet.
4. There were 4 new state of the art engines...