<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>orbital-decay</author><text>A spike isn&amp;#x27;t the only way to compensate for altitude, it&amp;#x27;s just the most popularized one. There are also expansion-deflection nozzles, expanding nozzles and notably removable inserts for ordinary bell nozzles, which are simple, good enough and are being used on real rockets for a long time.&lt;p&gt;&lt;i&gt;&amp;gt; But all in all, I think the best way I can summarize the Aerospike is to compare it to like the rotary engine seen on cars like the Mazda RX-7 and RX-8 and their predecessors.&lt;/i&gt;&lt;p&gt;This is a great analogy.</text><parent_chain></parent_chain></comment><story><title>Are Aerospike Engines Better Than Traditional Rocket Engines?</title><url>http://everydayastronaut.com/aerospikes/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>blakes</author><text>Here&amp;#x27;s an interesting interview the author did with Elon Musk: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=cIQ36Kt7UVg&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=cIQ36Kt7UVg&lt;/a&gt;&lt;p&gt;Fun to see how interested Elon is with the engineering of rockets, looks like he could talk for days if he had the time.</text><parent_chain></parent_chain></comment><story><title>Are Aerospike Engines Better Than Traditional Rocket Engines?</title><url>http://everydayastronaut.com/aerospikes/</url></story>