This paper model is a Silbervogel (German for Silver Bird), a design for a liquid-propellant rocket-powered sub-orbital bomber produced by Eugen Sänger and Irene Bredt in the late 1930s for Nazi Germany, the papercraft is created by Heinkel Models, and the scale is in 1:111.
The Silbervogel is also known as the RaBo (Raketenbomber or "rocket bomber"). It was one of a number of designs considered for the Amerika Bomber mission, which started out in the spring of 1942 being focused solely on trans-Atlantic range piston-engined strategic bombers, like the Messerschmitt Me 264 and Junkers Ju 390, the only two airframe types actually built and flown for the competition. When Walter Dornberger attempted to create interest in military spaceplanes in the United States after World War II, he chose the more diplomatic term antipodal bomber. For further information please click here.
You can download the papercraft model here: Nazi Germany Silbervogel (Silver Bird) Bomber Free Paper Model Download [Box] [Gavitex]