12/31/2012. Remarks by Walter van Tilborg: "The Grasmücke (Warbler) was an original design homebuilt aircraft by Rolf Ehmann of Göppingen, Germany, and after five years of construction it was first flown during 1993, registered as D-ESRE.

The aircraft was configured to resemble a 1920-1930 era biplane (it strongly resembled a scaled-down D.H.82 Tiger Moth) and was powered by a 65 hp Walter Mikron 4-III. It had foldable wings and tail planes to allow trailer transport and the one-of-a-kind aircraft was winner of the Original Design Award during the 1994 Fly-inn of the OUV (Oskar Ursinus Vereinigung, Oskar Ursinus Association)."