At the 1912 Allgemeine Luftfahrzeug-Ausstellung in Berlin, Hans Grade displayed two new monoplanes, with a “normal” fuselage, egg-shaped and tapering into a flat tail, instead the usual gondolas of his previous airplanes. One was a “Renneindecker”, identified as the D type, and the other was the bigger “Militäreindecker” with a 60/90 hp Grade engine, type E.
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