Скачать или смотреть How One Factory's "Musicians" Used Sound To Find Flaws In 90 Million Artillery Shells

In World War II, a single microscopic crack in an artillery shell meant instant death for the gun crew. In an era before computers or ultrasound, how did the British Army ensure 90 million rounds of ammunition didn't explode inside the barrel?
The answer wasn't found in an engineering manual. It was found in the ears of young women in freezing factories.
In this video, we uncover the untold story of the "Shell Tappers" and the "Canary Girls"—the uncredited musicians of the war effort. Working in the toxic, yellow fog of the Royal Ordnance Factories, these women used nothing but a hammer and perfect pitch to audit the difference between life and death.
👇 In this immersive history documentary, you will discover:
• The Symphony of Logistics: How a pure "B-flat" ring signaled a safe shell, while a dull "thud" meant catastrophe.
• The Toxic Price: The heartbreaking reality of the "Canary Girls," whose skin turned yellow from TNT poisoning as they built the arsenal of democracy.
• The Physics of Failure: Why a hairline fracture in a 25-pounder shell turns a field gun into a grenade.
• From Factory to Frontline: Follow the journey of a single shell from a workbench in Lancashire to the mud of Monte Cassino and the beaches of Normandy.
This is not just a story about manufacturing. It is a story about the invisible lifeline connecting the hands of women in England to the lives of soldiers in Europe. It is the story of how the war was won by a symphony of destruction, conducted by women who never missed a beat.
📺 Timestamps: 0:00 - The 25-Pounder’s Scream (Caen, 1944) 1:35 - Inside the Cathedral of Sound (The Shell Tappers) 3:45 - The Canary’s Cage: TNT and Sacrifice 5:20 - The Lottery of Life and Death (Monte Cassino) 7:10 - The Cost of Perfection: "It Wheezed" 9:30 - D-Day: The Symphony of Destruction 11:45 - The Final Chord: Victory and Silence
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