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Argues that the men and women working in a British airplane factory are the true secret weapon that will win the war against the Nazis. Shows an average day at the factory where work goes on around the clock. Maintaining peak efficiency is…

This short nonfiction film depicts the intensive testing that goes into developing and producing new military equipment, here the propeller engine of a fighting plane. It opens with the whirring or propeller blades. Animated diagrams show how the…