<i>&quot;An artist&#x27;s impression of how the new engine would look in ground tests&quot;</i><p>A render of a <i>test stand firing</i>? Now that&#x27;s a bit much.  Now that they have $21 million, they had better do that for real on a test stand.<p>They&#x27;ve been working on this for over a decade.  I&#x27;d expect at least a small scale demo by now.