How fast is hypersonic?

Related questions

1. Why does true airspeed decrease with altitude?
2. Why is airspeed measured in knots?
3. What is vs1 airspeed?
4. Is true airspeed affected by wind?
5. Does headwind increase or decrease airspeed?
6. How is airspeed measured?
7. How does density altitude affect true airspeed?
8. Is calibrated airspeed the same as indicated airspeed?
9. How is true airspeed calculated?
10. What is airspeed sensor?

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13. #speed
14. #800mph
15. #plans
16. #hours
17. #between
18. #journey
19. #potential
20. #hypersonic
21. #would