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Fast navy fighting plane retracts wheels Fast navy fighting plane retracts wheels
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Rubber ball landing gear used for airplanes Rubber ball landing gear used for airplanes
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The west point of the air The west point of the air
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Huge crane lifts big guns like match sticks Huge crane lifts big guns like match sticks
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Popular Mechanics, v. 62, n. 2, 1934
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Gun to combat war tanks shoots through steel Gun to combat war tanks shoots through steel
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Beam gun "shoots down" pilots at night Beam gun "shoots down" pilots at night
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Machine gun of air-rifle size uses special bullet Machine gun of air-rifle size uses special bullet
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Gas masks to guard horses and dogs in war Gas masks to guard horses and dogs in war
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Robot warships Title: Robot warships
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Training planes in frames move in circles Training planes in frames move in circles
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Camouflage tricks tested on army planes Camouflage tricks tested on army planes
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The west point of the air The west point of the air
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Popular Mechanics, v. 62, n. 1, 1934
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Popular Mechanics, vol. 75, n. 4, 1941
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Signal pistol guides pilot to airport in fog Signal pistol guides pilot to airport in fog
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Fastest bomber in the orient built for China Fastest bomber in the orient built for China
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Guns aimed without sights are more accurate Guns aimed without sights are more accurate
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Nations vie for best six-inch gun cruiser Nations vie for best six-inch gun cruiser
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Military flying boat has wings like bird Military flying boat has wings like bird
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Popular Mechanics, v. 61, n. 6, 1934
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Britain adds new submarine to her sea forces Britain adds new submarine to her sea forces
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Machine gun on motorcycle is anti-aircraft weapon Machine gun on motorcycle is anti-aircraft weapon
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Flexible wheels smooth bumps for truck Flexible wheels smooth bumps for truck
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Triple-deck war plane has armored dull Triple-deck war plane has armored dull
