Get the full EPUB
The EPUB is part of the HistorIQly Plus library. The case file on this page stays free to read.
This EPUB is already in your library. The case file on this page stays free to read.
Download EPUBPlus includes every book in the library. See what Plus includes
Every book in the library is yours to download.
All EPUBs are in English. Translations are coming.
In 1943, the U.S. Navy allegedly rendered a destroyer escort invisible and teleported it two hundred miles — with catastrophic consequences for the crew. For seven decades, the Philadelphia Experiment has captivated conspiracy theorists worldwide.
But the entire legend traces back to one man, two letters, and zero evidence.
DE-173
USS Eldridge — a Cannon-class destroyer escort commissioned August 27, 1943. Her deck logs prove she was never in Philadelphia during the alleged experiment.
1
Carlos Allende supplied the founding letters. Later accounts report an admission and retraction; the ship records contradict his claims.
127
Copies arranged personally by two ONR officers. The ONR information sheet gives 25 copies; the printing did not endorse the claims.
"Never"
"ONR has never conducted investigations on radar invisibility, either in 1943 or at any other time."
The Evidence
The Shipyard
The Philadelphia Naval Shipyard was one of the busiest in the nation during WWII. Carlos Allende claimed to have witnessed the Eldridge vanish from its berth here — but the ship's deck logs prove it was never at this facility during the alleged period. The Eldridge was in Bermuda and New York.
Degaussing
The USS Engstrom, docked near where the Eldridge would have been, carried classified degaussing equipment — cables wrapped around the hull to neutralise magnetic signatures and protect against mines. Degaussing affects magnetic-mine sensors, not optical visibility. ONR separately cites 1950s generator work on USS Timmerman that produced corona discharges; its connection to the legend is conjectural.
The Ship's Fate
In 1951, the Eldridge was transferred to Greece and renamed HS Leon. Greek naval personnel maintained the ship for decades and found nothing unusual. The ship was eventually sold for scrap in 1999. No identified inspection report establishes the exhaustive search sometimes claimed for it.
From Hoax to Legend
The Alleged Experiment
The USS Eldridge is supposedly made invisible and teleported from Philadelphia to Norfolk. Deck logs show the ship was actually near Bermuda and New York.
Allende's Letters
Carlos Allende writes to Morris Jessup claiming to have witnessed the experiment. He provides no evidence, no witnesses, and no verifiable details.
Jessup's Death
Morris Jessup is found dead in the Miami area. Later accounts report carbon-monoxide poisoning and a suicide ruling; no corroborated link establishes murder over the alleged experiment.
The Bestseller
Berlitz and Moore publish The Philadelphia Experiment: Project Invisibility, bringing the story to millions for the first time.
The Movie
The Philadelphia Experiment becomes a feature film, cementing the legend in popular culture. Time travel elements are added to the original story.
The Hoaxer & The Physicist
Carlos Allende
Born Carl Meredith Allen, this merchant mariner supplied the letters central to the legend; later claimants added other accounts. He admitted it was a hoax in 1969, then retracted the confession. Neither later character assessments nor a pseudonym can substitute for checking his claim against the ship records.
Albert Einstein
Einstein's Unified Field Theory was cited as the basis for the experiment, but he never completed it. He did consult for the Navy during WWII — on conventional explosives, not electromagnetic invisibility. There is no evidence linking him to any such experiment.
The Ship Was Never Invisible
No evidence. One unreliable witness. A ship that was never in Philadelphia. Crew members who denied everything. And a Navy that categorically states it never happened.
The Philadelphia Experiment is a masterclass in how a single fabrication can become an unshakeable legend — growing from two letters into books, films, and an entire mythology spanning eight decades.
Get the Full Book
10 chapters trace Allen’s letters, available naval records and the legends that followed.