<story><title>Boom Supersonic hopes to test-fly its supersonic plane in 2021</title><url>https://www.engadget.com/boom-supersonic-xb-1-2021-130025910.html</url></story><parent_chain><item><author>dhosek</author><text>Nobody seems to be talking about the sonic boom issue. People often assume that the sonic boom is a single event that happens when the plain exceeds the speed of sound, but rather its a continuous event that happens at supersonic speed which is why the Concord was used only for transatlantic service. A supersonic plane would not be practical for any overland route.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Sonic_boom&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Sonic_boom&lt;/a&gt;</text></item></parent_chain><comment><author>liability</author><text>The premise of Boom Technologies is that the intensity of the sonic boom can be managed by creating an aircraft with a sufficiently clever shape.  I don&amp;#x27;t know exactly how that&amp;#x27;s meant to work, but it&amp;#x27;s this premise that they hope to demonstrate with the small-scale XB-1 in 2021.</text></comment>
<story><title>Boom Supersonic hopes to test-fly its supersonic plane in 2021</title><url>https://www.engadget.com/boom-supersonic-xb-1-2021-130025910.html</url></story><parent_chain><item><author>dhosek</author><text>Nobody seems to be talking about the sonic boom issue. People often assume that the sonic boom is a single event that happens when the plain exceeds the speed of sound, but rather its a continuous event that happens at supersonic speed which is why the Concord was used only for transatlantic service. A supersonic plane would not be practical for any overland route.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Sonic_boom&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Sonic_boom&lt;/a&gt;</text></item></parent_chain><comment><author>bananabreakfast</author><text>Almost all of the research on sonic booms and their effect on residential noise levels was done in the 1950s.&lt;p&gt;Our knowledge of transonic aerodynamics and aircraft design have improved considerably sense then and much of the &amp;quot;common&amp;quot; knowledge that sonic booms will shatter windows and disrupt everyday life as a plane flies overhead at cruising altitude are very much outdated.</text></comment>