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Space


Germany and Materials Science

For many years several German organizations, e.g., Intospace GmbH, Kayser-Threds GmbH, DASA, OHB-System GmbH, and DLR's Microgravity User Support Center, have been involved in numerous European microgravity experiments on such foreign orbital plafforms as EURECA, FSW-1, Mir, Photon, Resurs-F, and Spacelab. The German mission to the Mirspace station in 1992, the 1993 flight of Spacelab D2 on STS-55, and participation in IML-2 in 1994 on STS-65 represent the latest man-tended materials research efforts undertaken. Spacelab D2, in particular, hosted six furnaces, including the Material Sciences Experiment Double-rack for Experiment Modules and Apparatus (MEDEA) and the Material Sciences Laboratory. On IML-2 DARA sponsored the Quasi-Steady Acceleration Measurement experiment to monitor microgravity levels for various types of studies (References 749, 764-765).

In late 1992 the German national space agency agreed to develop with Japan and the Russian Federation a small, recoverable capsule for short-duration, low-altitude orbital missions. Named EXPRESS (Experimental Reentry Space System), the 765-kg spacecraft (including an initial payload of nearly 130 kg) was to be launched by the last Japanese M-3SII booster from Kagoshima in the Summer of 1994. However, program difficulties prevented the mission from meeting the narrow Japanese launch window, and the flight was delayed until early 1995. Based in part on a Russian re-entry vehicle, the EXPRESS spacecraft consists of two basic components: a 400-kg recovery capsule and a 365-kg service module. The maximum flight time is one week with a re-entry g-load of up to 10 g's. The spacecraft has an overall length of 2 m and a maximum diameter of 1.4 m. If the first flight, which carried two German electric furnaces, was successful, plans called for additional missions by a to-be-determined small launch vehicle (References 766-774)




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