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Planes "destroy" New York in a mock attack Planes "destroy" New York in a mock attack
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Telescope for the rifleman aids in watching shots Telescope for the rifleman aids in watching shots
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Aerial battleship carries guns and bombs Aerial battleship carries guns and bombs
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Respirator for gas victims used in war training Respirator for gas victims used in war training
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Popular Mechanics, v. 61, n. 1, 1934
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Floating airport has "field" seven hundred feet long Floating airport has "field" seven hundred feet long
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Gas-proof tanks protect crews from attack Gas-proof tanks protect crews from attack
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Spring "gun" shoots arrow with vacuum cup tips Spring "gun" shoots arrow with vacuum cup tips
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Light bullet fired from gun at electric-eye target Light bullet fired from gun at electric-eye target
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Gunning for war birds Gunning for war birds
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Popular Mechanics, v. 60, n. 6, 1933
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Popular Mechanics, v. 75, n. 3, 1941
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Armored car has gun turret and bullet-proof tires
Armored car has gun turret and bullet-proof tires
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Gun on truck cab guards fleet Title: Gun on truck cab guards fleet
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"Baby" truck aids army scouts and raiders "Baby" truck aids army scouts and raiders
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Baby guns aid in training artillery officers Baby guns aid in training artillery officers
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Automatic 'chute for flyers successful in tests
Automatic 'chute for flyers successful in tests
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Popular Mechanics, v. 60, n. 5, 1933
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Trapdoor for airplane pilot is in nose of bomber Trapdoor for airplane pilot is in nose of bomber
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Air "ghosts" show aviators how wind acts Air "ghosts" show aviators how wind acts
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Rough riders of the sky Rough riders of the sky
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Popular Mechanics, v. 60, n. 4, 1933
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Armored car "traps" bullets to protect bystanders Armored car "traps" bullets to protect bystanders
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Popular Mechanics, v. 60, n. 3, 1933
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Mile-a-second rifle bullet is squeezed in firing
Mile-a-second rifle bullet is squeezed in firing
