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The first, Engineering, Design and Construction of Portable Newtonian Telescopes (Willmann-Bell) provided an overview of the engineering and materials science fundamentals, and a simplified product development process, applicable to building any telescope.
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In addition, it supplied quantitative design rules for constructing truss-tube telescopes. Careful testing has proven the validity of the rules, and the creation over the years of more than 30 highly portable telescopes for himself and others has demonstrated the effectiveness of a disciplined approach.
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