This Alex Tremulis-designed torpedo boat of the future appeared in the January 20, 1943 issue of Yank - The Army Weekly (New York, NY). His design for a personal helicopter of the future was from that same year.
See also:
Future War Tank (1939)
Will War Drive Civilization Underground? (1942)
Nazi Paleo-Futurism (1941)
Word Origins: Imagineering, continued (1942)
After the War (1944)
Memory of 'Tomorrow' (New York Times, 1941)
Personal Helicopter (1943)
Looks like this toy:
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