America's Sherman Needed Diesel Power in 1943 — So Caterpillar Rebuilt an Aircraft Radial
The M4 Sherman is famous for its many engines, but one of its strangest and most forgotten powerplants was the Caterpillar RD-1820 diesel radial engine used in the rare M4A6 Sherman. This video explores how a Wright R-1820 aircraft engine was transformed into diesel power for a World War II tank, why the U.S. Army wanted a diesel Sherman, and why this remarkable engineering success disappeared from history.
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