I decided I really ought to go back and finish up the Delta II rocket. There were no real blockers, I just let it slip somehow…
As is often the case I like a spacecraft with a distinctive shape, and it’s also cool that I can easily make several variations with different logos and numbers of boosters.
Here’s how it’s coming along!
Right now though, there’s something I don’t quite understand. The exhaust bells of the smaller boosters have 3 black marks around the rims. But in one reference image, they clearly show as notches, and I have never seen anything like this elsewhere.
See photos below.
What is going on?!?! What are the notches for?
He explains: The notches are there to support alignment fixtures. Once motors are aligned, we back-fill with cork and thermal RTV.
Thanks Tory, much appreciated!
So it looks like I will not need to cut out the notches.