Page 71 - Demo

Rocket Mail of the WorldGermanyBremen, Germany %u2014 February 5, 1966 %u2014 EZ-X75C2 %u2014 H.O.G. (Hermann Oberth Society).Reduced facsimile of back below.(cachet text) Hermann Oberth Society. Society for the Promotion of the Exploration and Development of Space eV.(black rubber stamp) Carried with H.O.G. rocket test series VR2.(text on back) Bremen, February 5, 1966. This card is a greeting from the Coordination Conference of the company's Rocket and Space Technology Teaching and Testing Centers. During flight tests it was carried as ballast in one of the test aircraft and then handed over to the German Federal Post Office for stamping and transport by post. President of the HERMANN OBERTH SOCIETYSociety to Promote Research and Development of Space eV. For illustration: The reactor satellite SNAP 10-A is combined with the working model of an electric engine. This is a so-called electrostatic (ion) engine, which was tested in July 1964 during a half-hour ballistic flight and kept in operation for 19 minutes. The ion engine uses about half of the current supplied by SNAP 10-A. The 440 kg, conical reactor unit SNAP 10-A is 3 m high and has a base width of 1.5 m. The reactor alone weighs 110 kg; it is located at the tip of the cone. 37 rod-shaped fuel elements made of uranium-235 and zinc hydride serve as %u201cfuel.%u201d A pumping station keeps the coolant%u2014liquid metal%u2014in circulation in order to supply the reaction heat to the thermionic converter. The approximately 3000 converter cells are located in several sections on the outside of the cone shell.