The Elfe series started from a 9 m sailplane designed by W.Pfenninger before World War II. A new design was introduced by him in 1947 to become the Elfe 2, probably the first sailplane with a laminar flow airfoil. Subsequently the series was further developed by Markwalder in 1951 to become the Elfe PM-3 (brought to the US in the sixties).
Markwalder had completed the drawings after Ruedi Sägesser had problems with the construction. Pfenninger came up with the idea of the construction.
All Aero 