Chumichev's amphibian was a car-boat designed and built in the Soviet Union in 1968 by the Moscow engineer Yurij Elisevich Chumichev. Before building it he towed models with hulls of different shapes on a long thread with a dynamometer to find the best form. The amphibian seated two adults and was meant mainly for summer outings. It combined a doorless, half-closed sports-type unitary body with a boat hull 3,700 mm…