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<a accesskey="3" href="page.php?w=Hypersonic_flight&amp;p=2">3.Next</a>
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<p><b>Hypersonic flight</b> refers to the motion of aircraft, missiles, or spacecraft through the <a href="page.php?w=atmosphere">atmosphere</a> below the <a href="page.php?w=Karman_line">Karman line</a> at <a href="page.php?w=Hypersonic_speed">speeds greater than Mach 5</a>, above which thermochemical effects and aerodynamic <a href="page.php?w=heat_load">heat load</a>s become significant. </p>

<p><big>History</big></p>
<p>The first manufactured object to achieve hypersonic flight was the two-stage <a href="page.php?w=RTV-G-4_Bumper">Bumper</a> rocket,</p><p>
<a accesskey="3" href="page.php?w=Hypersonic_flight&amp;p=2">3.Next</a>
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