How One Blacksmith’s ‘UNAUTHORIZED' Rivet Buckled the Sherman’s Spalling Deathtrap
Автор: Beyond The Self
Загружено: 2025-11-01
Просмотров: 770
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June 1944 — Normandy.
Every Sherman crew knew the truth: their tanks could kill them even when enemy rounds didn’t. When a German shell slammed into a Sherman’s armor, thousands of tiny steel rivets inside the hull sheared off, ricocheting through the crew compartment like shrapnel. It was called spalling, and it turned surviving a hit into a death sentence.
Then, in a field depot behind the front, a Pittsburgh blacksmith named Sergeant Joseph Kowalski broke every regulation in the Army manual.
Using a grinder, he cut shallow grooves into each rivet — a tiny modification that locked the metal in place and stopped the rotation that caused catastrophic failure.
His “unauthorized” fix saved thousands of lives, spread through every U.S. armored division in Europe, and changed tank design forever — all from a single night’s work with a hammer, grinder, and nerve.
One groove. One blacksmith. One rivet that rewrote the history of armored warfare.
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