Gottinger Monograph N: German Research and Development on Rotating Wing Aircraft 1939-1945 (Library of Flight)

After World War II the British Ministry of Supply ordered the German aeronautical research establishments in Gottingen (AVA) and Braunschweig (DFL) to summarize research results obtained from 1939 to 1945. Gottinger Monograph N deals with all German helicopter and autogyro development during this period, including the contributions of Focke, Flettner, von Doblhoff, and others who brought rotorcraft into series production maturity.

Berend G. van der Wall holds the position of Senior Scientist at the Institute of Flight Systems of the German Aerospace Center (DLR) in Braunschweig, where he works on numerical simulation of helicopter rotors and is involved in wind tunnel testing of rotors and of scaled helicopter models. He studied Aerospace Engineering at the TU Braunschweig and at the University of Maryland. His numerous publications and patents on active rotor control and rotor blade design make him an expert on the subject. The American Helicopter Society honored him with the Howard Hughes Award and the AgustaWestland International Fellowship Award. He is an Honorary Professor at TU Braunschweig where he is lecturer for rotary-wing aerodynamics and rotor dynamics.