Why do 777 not have winglets?

Related questions

1. Why do some planes not have winglets?
2. How do sharklet materials grow bacteria?
3. Do winglets really save fuel?
4. Why are airplane wings tipped up at the end?
5. What does Sharklets mean on AA?
6. What is the oldest 747 still flying?
7. How long does it take to refuel an a320?
8. What is the difference between a sharklet and a winglet?
9. How does the 747 lift off the ground?
10. Do winglets reduce turbulence?

Tags

1. #according
2. #visible
3. #tight
4. #highly
5. #manner
6. #wings
7. #reduce
8. #range
9. #gates
10. #airport
11. #exceptionally
12. #wingtips
13. #these
14. #offered
15. #airplane
16. #boeing
17. #folding
18. #because
19. #winglets
20. #tradeoff