The series premiered in 1920. Stopped in
1940 due to paper shortage caused by World War 2, but has since
been continued by Danish artists as Willy på Eventyr.
The title character (whose last name is never
revealed) is a young pilot travelling from one adventure to
another starting in different, earthly locations and continuing
as science fiction. To some extent there is a temporal
continuation in the series; Rob started out in a marine airplane
called SM3, and he then moved on to SM4, later a jetplane, and then
more updated versions of the SM series that also travel in
Space. Rob is often accompanied by a young girl named Joan.