Siegfried and Walter Günter were twin brothers and aircraft designers. Their talents were first recognised by Paul Bäumer who was impressed by the performance of a sailplane they had built with their friends Walter Mertens and Werner Meyer-Cassel and were flying at Wasserkuppe. Bäumer offered all four men a job with his company Bäumer Aero in Berlin. There they began designing motor gliders and then increasingly fast sports planes, including one in which Bäumer himself was killed in a creash in 1928. Gliders are un-powered heavier-than-air aircraft. ... The Wasserkuppe (German: water peak) is a high plateau (elevation 950 m or 3100 ft), the highest peak in the Rhön Mountains within the German state of Hessen. ... Berlin (pronounced: , German ) is the capital of Germany and its largest city, with 3,387,404 inhabitants (as of September 2004); down from 4. ... Gliders are un-powered heavier-than-air aircraft. ... 1928 was a leap year starting on Sunday (link will take you to calendar). ...

In 1931, Ernst Heinkel recruited the Günters to work for his Heinkel company in Rostock. There they were to design some of the most important and famous designs associated with the company, including the Heinkel He 51, He 70 and the He 111. 1931 is a common year starting on Thursday. ... Ernst Heinkel (January 24, 1888 - January 30, 1958) was a German aircraft designer and manufacturer. ... Heinkel Flugzeugwerke was a German aircraft manufacturing company founded by and named after Ernst Heinkel. ... Rostock (slavic origin: roztoc) is a city in northern Germany. ... The Heinkel He 51 was a single-seat biplane which was produced in a number of different versions. ... The Heinkel He 70 Blitz was designed in the early 1930s to serve as a fast mailplane for Deutsche Lufthansa. ... The Heinkel He 111 was the primary Luftwaffe medium bomber during the early stages of World War II, and is perhaps the most obvious symbol of the German side of the Battle of Britain. ...

Siegfried died on June 19, 1969. June 19 is the 170th day of the year (171st in leap years) in the Gregorian Calendar, with 195 days remaining. ... 1969 was a common year starting on Wednesday (the link is to a full 1969 calendar). ...