The German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) has conducted ground tests in preparation for the maiden flight of the high-altitude solar aircraft HAP-alpha (High ...
Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...
Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...
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