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Popular Mechanics, v. 58, n. 4, 1932
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Planes dives faster is motor is shut off
Planes dives faster is motor is shut off
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Glass cage for air gunners increases accuracy Glass cage for air gunners increases accuracy
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Model of pocket battleship helps navy draftsmen Model of pocket battleship helps navy draftsmen
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Folding raft for airplanes eliminates carrier ship
Folding raft for airplanes eliminates carrier ship
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Popular Mechanics, v. 58, n. 3, 1932
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Pencil has tiny lamp inside for writing in dark Pencil has tiny lamp inside for writing in dark
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Hidden heart of man-of-war at engine throttle Hidden heart of man-of-war at engine throttle
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"Jump" is taken out of guns by cylinders on muzzles "Jump" is taken out of guns by cylinders on muzzles
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U.S Warships refuel at sea during maneuvers U.S Warships refuel at sea during maneuvers
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Persuit airplane fires six guns at once
Persuit airplane fires six guns at once
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Motors speed up cavalry in army maneuvers Motors speed up cavalry in army maneuvers
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Popular Mechanics, v. 58, n. 2, 1932
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Popular Mechanics, v. 74, n. 3, 1940
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Seven-barrel gun fires all shots at once Seven-barrel gun fires all shots at once
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New weapons of war only improvements on ancient arms New weapons of war only improvements on ancient arms
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Winged bullet cuts armor at thirty yards
Winged bullet cuts armor at thirty yards
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Plane built like albatross latest army bomber Title: Plane built like albatross latest army bomber
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Water is wrung from fuel to make flying safer Title: Water is wrung from fuel to make flying safer
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Camera like a machine gun trains air marksmen Camera like a machine gun trains air marksmen
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Toys teach the art of war to future generals Toys teach the art of war to future generals
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Flying tank newest air manace Flying tank newest air manace
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Popular Mechanics, v. 58, n. 1, 1932
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Gas helmets used in airship helium compartments
Gas helmets used in airship helium compartments
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Ten guns on airplane give shotgun effect Title: Ten guns on airplane give shotgun effect
