JF Mezei wrote on Wed, 14 Mar 2018
18:26:19 -0400:


It will probably fly without the vacuum engines or a heat shield,

If those engines are mounted next to each other, wouldn't a test require
that there would at least be mockup vacuum engines mounted to ensure
that their bells don't interfere with the sea level engines ?


If that was a concern (and I'm not sure why you wouldn't figure that
out in ground testing), all you need are the bells. It's the engines
that are heavy, not the expansion bells.


--
"Some people get lost in thought because it's such unfamiliar
territory."
--G. Behn