Replacement of main wheels and tail wheel of a Fieseler Fi 156 Storch with articulated skis for winter operations.
These drawings were originally featured in Das Flugzeug - Dritte Auflage [The Aircraft - Third Edition], edited by Theo E. Sönnichsen, published by Richard Carl Schmidt & Co., Berlin, Germany, 1942. Das Flugzeug was a heavily illustrated, 944 page (!) handbook on technical, mechanical, and operational aspects of aviation.
Das Flugzeg also included an additional illustrated booklet detailing the design and configuration of the Focke-Wulf Fw 58 Weihe, a large German aircraft identification wall poster, and various fold-out color plates. (Fischer collection)