Stephen Koschal ~ Quality Autographs & Signed Books Serving Collectors, Libraries, Institutions, Autograph Galleries and Dealers with Autographs and Signed Books in all Fields of Collecting Since 1967. 7155 Sand Crest View, Colorado Springs, CO 80923 USA ~ Phone (561) 315-3622 ~ skoschal@aol.com

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Inventor of the Solar Powered Plane & Human Powered Aircraft MACCREADY, Paul  (1925-2007).  American aeronautical engineer, designer of the human powered aircraft. It won the First Kremer Prize. Later he created the solar powered aircraft. MacCready was the 1st American Pilot to become the World Soaring Champion. Blue slip, 2”x6”,  with a printed cachet of 4 U.S. Stamps relating to space projects. Signed by Paul MacCready............ $22.50

Stephen Koschal ~ Quality Autographs & Signed Books Serving Collectors, Libraries, Institutions, Autograph Galleries and Dealers with Autographs and Signed Books in all Fields of Collecting Since 1967. 7155 Sand Crest View, Colorado Springs, CO 80923 USA ~ Phone (561) 315-3622 ~ skoschal@aol.com