[ExI] It's not rocket science - Well, it is actually.

[BillK]

This might interest budding rocket scientists.

<http://openrocket.sourceforge.net/features.html>

OpenRocket is an free, fully featured model rocket simulator that
allows you to design and simulate your rockets before actually
building and flying them.

OpenRocket features a full six-degree-of-freedom simulation, realistic
wind modeling, a multitude of different components including free-form
fins and canted fins, automatic design optimization, clustering and
staging.
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BillK