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- RUSI Defence Systems
- Volume: 18
- Full Speed Ahead: Hypersonic Threats and Ship Survivability
Hypersonic flight is generally understood to refer to speeds above Mach 5, or roughly almost 4,000 mile per hour. The extreme heat and pressure forces created by travelling at such speeds, especially at low altitudes where anti-ship missiles must operate, are barriers that missile engineers have until recently found insurmountable.