Why can't helicopters fly fast?

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Tags

1. #rotating
2. #helicopter
3. #wildly
4. #counter
5. #course
6. #helicopters
7. #separation
8. #going
9. #blades
10. #against
11. #rotors
12. #faster
13. #generates
14. #because
15. #every
16. #right
17. #control
18. #sometimes