05-05-2016, 07:53 PM
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Amateur Professional
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Join Date: Jan 2016
Location: US > OK > NE
Posts: 24
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Quote:
Originally Posted by BEC
How 18x70mm became the standard model rocket motor size is described by G. Harry Stine himself starting at the bottom of of page number 7 (eighth actual page of the .pdf) here: http://www.questaerospace.com/image...tine_Memoir.pdf
I'll leave it to others to explain the other sizes.
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Thanks for that piece of history!
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