The Diesel Engine Flaw That Forced the U.S. Navy to Rebuild 12 Gato-Class Submarines

During World War II, the U.S. Navy sent a twelve-boat run of Gato-class submarines to sea with powerful but troublesome Hooven-Owens-Rentschler double-acting diesel engines. What looked like an advanced solution for compact, high-output submarine propulsion became a serious engineering problem as USS Gunnel, USS Harder, USS Gurnard, and other boats suffered recurring gear failures, severe vibration, damaged piping, and lost operational time. This video follows the H.O.R. diesel crisis from Gunnel’s alarming breakdowns to the Navy’s decision to pull frontline submarines from combat, cut into their pressure hulls, remove the unreliable machinery, and replace it with General Motors or Fairbanks-Morse engines-showing how wartime engineering, mass production, and operational necessity collided beneath the decks of America’s Pacific submarine force. Sources: https://www.history.navy.mil/research/hist... https://www.history.navy.mil/research/hist... https://www.history.navy.mil/research/libr... https://maritime.org/doc/fleetsub/diesel/c... https://maritime.org/doc/fleetsub/diesel/c... https://maritime.org/doc/fleetsub/chap6.php #WWII #WorldWarII #USNavy #Submarines #GatoClass #USSGunnel #USSHarder #NavalHistory #MilitaryHistory #PacificWar #DieselEngine #EngineeringHistory