The Real Classified Device Behind The Philadelphia Experiment

Cool but not invisibility cool

Grant Piper
4 min readJul 21, 2023
RMS Queen Mary with degaussing coil, 1945 (Public domain)

The Philadelphia Experiment was an incident passed along by word-of-mouth and hearsay that supposedly took place in 1943 during the peak of World War II. A US naval destroyer, the USS Eldridge, was allegedly teleported from the Philadelphia Navy Yard to the shipyards in Norfolk, Virginia. The experiment was supposed to be testing particle field theories in pursuit of making a ship invisible. However, the experiment went haywire and teleported the ship from Philadelphia to Norfolk by accident before teleporting back. The men on the ship were supposedly struck with insanity, frozen into place, or got stuck to the warped surface of the deck.

The Philadelphia Experiment has been debunked as a hoax. The whole incident is based entirely on the “eyewitness” account of one man, Carl M. Allen. Obviously, the Navy denies that any such thing took place.

But something secret was onboard the USS Eldridge and the device in question was supposed to make the ship invisible. Just not in the way that most people think.

The truth of the Philadelphia Experiment is a combination of misunderstanding of physics, partial information, and one giant game of telephone.

Degaussing

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Grant Piper

Professional writer. Amateur historian. Husband, father, Christian.