I'm interested in this thread as I'm trying to work out separating boosters on an R-7 or an Angara.

I'll echo Bill's question: Why to the boosters need to be individually stable? Is there a scenario where they are under boost without the core?

How about three or four fins just on the core? For instance, what if you took the Gemini-Titan or Titan II Estes kit with the clear plastic fin unit and added the boosters?

Maybe we could have more info on your projected profile? A10s in the boosters with a B6 or C6 core? How were you going to separate the boosters ?

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