JF Mezei wrote on Thu, 15 Mar 2018
01:57:12 -0400:

On 2018-03-14 19:09, Fred J. McCall wrote:

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.


What are the major differences between a sea level Raptor and a vaccum
Raptor? Wouldn't the differences be focused on the shape of the bell?


Correct, which is why if interference of 'space engines' with 'sea
level' engines is a concern (and I can't imagine why it would be) you
only need the bells and not the engines.


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