The Submarine Part I: Physical Principles is a short Navy training film produced by Audio Productions, Inc. in 1940. The film, using animation, presents an overview of the key physical principles of how a submarine operates. The film starts with footage of a sub surfacing (00:37) before switching to animation to demonstrate the physical principles. First is Archimedes’ Law of Buoyancy (00:50) and Force of Buoyancy (02:00), as the film discusses how to change buoyancy through engineering water and air displacement. The film then discusses Fore and Aft Balance, based on Archimedes’ Law of the Lever (06:10); keeping the center of gravity in line with the center of buoyancy is how subs stay level. The film then quickly shows the effects of tilt on a sub (07:53), before ending the animation and concluding the film as it began—with footage of a submarine surfacing (10:35).

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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com