Bill Eichelberger's Semroc - Sigma II
Manufacturer:Semroc
Diameter:0.7550 inches
Style:Multi-Stage, Sport

No plans exist that I know of, so I used the artist rendering in the 1970 Astronautic Modeler to come up with fin shapes and tube sizes.  This is more of a close guess than an actual rocket built from a plan.

Semroc Sigma II.jpg

 

Flights

 

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