Design and interior struture of floats for the Junkers Ju 52/3m transport, as featured in Das Flugzeug - Dritte Auflage [The Aircraft - Third Edition], edited by Theo E. Sönnichsen, published by Richard Carl Schmidt & Co., Berlin, Germany, 1942.
Top image shows struts [Schwimmergestell], floats [Schwimmer], and bracing wires [Verspannungskabel].
Centre image shows light alloy float with a water displacement of 9500 litres [Leichtmetallblech-Schwimmer mit 9500 Ltr. Wasserverdrängung]. Details include wooden grating [Holzrost], frames [Spanten], bay for provisions [Proviantschacht], manholes [Mannlöcher], nautical horn cleat [Seehaltegriff], anchor [Grundanker], and mooring rope [Halteleine].
Lower image shows cross section of float [Schwimmerquerschnitt] with waterline. (Fischer collection)