Boeing Starliner aerodynamics

In article ,
says...

On 2019-12-22 12:28, Jeff Findley wrote:
https://www.space.com/boeing-starlin...ket-aeroskirt-
explained.html

Thanks. So this un-aerodynamic looking skirt changed the airflow to
resolve a shockwave at the bottom of rocket.

It still hits the first stage/interstage. They needed to prevent it
from hitting the Centaur *upper* stage.

Would such a skirt (compared to a smooth fairing) end up generating drag
that is noticeable in performance or is the difference with normal
fairing small enough that it is not an issue?

I realise the skirt is the best solution for airflow further down, but
that doesn't mean it doesn'kt come at a cost. Just curios if this is
significant drag or not.

Not sure. I'm not privy to the results of the supersonic CFD
simulations that prompted the skirt.

Jeff
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