<story><title>SpaceX is now building a Raptor engine a day, NASA says</title><url>https://arstechnica.com/science/2022/11/spacex-is-now-building-a-raptor-engine-a-day-nasa-says/</url></story><parent_chain><item><author>MichaelZuo</author><text>It&amp;#x27;s incredible how much more efficient SpaceX is compared to Aerojet Rocketdyne. One Raptor per day vs 4 RS-25s per year...</text></item></parent_chain><comment><author>pjkundert</author><text>At this point, unless a nation-state gets serious (and I have to believe at least China and Russia &lt;i&gt;are&lt;/i&gt;), SpaceX is going to win.  Their lead is just too great for anyone else to surmount.&lt;p&gt;This is bad, because a sole supplier of viable orbital rocketry is almost as bad as only nation-states having the capability.&lt;p&gt;Hopefully, someone steps up to the plate.  My guess is that Russia and&amp;#x2F;or China both have &amp;quot;black&amp;quot; programs to copy and replicate SpaceX&amp;#x27;s technology...</text></comment>
<story><title>SpaceX is now building a Raptor engine a day, NASA says</title><url>https://arstechnica.com/science/2022/11/spacex-is-now-building-a-raptor-engine-a-day-nasa-says/</url></story><parent_chain><item><author>MichaelZuo</author><text>It&amp;#x27;s incredible how much more efficient SpaceX is compared to Aerojet Rocketdyne. One Raptor per day vs 4 RS-25s per year...</text></item></parent_chain><comment><author>cnlevy</author><text>It&amp;#x27;s more like 4 years for ONE RS-25 ...&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.reddit.com&amp;#x2F;r&amp;#x2F;SpaceLaunchSystem&amp;#x2F;comments&amp;#x2F;pbk4am&amp;#x2F;takes_445_years_to_build_a_rs25&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.reddit.com&amp;#x2F;r&amp;#x2F;SpaceLaunchSystem&amp;#x2F;comments&amp;#x2F;pbk4am&amp;#x2F;t...&lt;/a&gt;</text></comment>