rainbow

The following account, pulled from a variety of sources and "self-proclaimed witnesses", describes an event that may have happened in 1943 aboard the U.S.S. Eldridge.
The story begins in June of 1943, with the U.S.S. Eldridge, Destroyer Escort 173, being fitted with tons of experimental electronic equipment. This included two massive generators of 75 KVA each, mounted where the forward gun turret would have been, distributing their power through four magnetic coils mounted on the deck. Three RF transmitters (2 megawatt CW each, mounted on the deck), three thousand"6L6" power amplifiers tubes (used to drive the field coils of the two generators), special synchhhronizing and modulation circuits, and a host of other specialized hardware were employed to generate massive electromagnetic field which, when properly configured, would be able to bend light and radio waves around the ship, thus making it invisible to enemy observers.
The experiment, said to have taken place at the Philadelphia Naval Yard and also at sea, took place on at least one occasion while in full view of the Merchant Marine ship S.S. Andrew Furuseth, and other observation ships. The Furuseth becomes important because one of it's crewmen is the source of most of the original material. Carlos Allende, a.k.a. Carl Allen, wrote a series of strange letters to one Dr. Morris K. Jessup in the 1950's in which he described what he claims to have witnessed one of the several phases of the Philadelphia Experiment.
At 0900 hours, on July 22nd, 1943, the power to the generators was turned on, and the massive electromagnetic fields started to build up. A greenish fog was seen slowly enveloping the ship, concealing it from view. Then the fog itselfdisappeared taking the Eldridge with it, leaving only undisturbed water where the ship had been anchored only moments before.
The elite officers of the Navy and scientists involved gazed in awe at their greatest achievement. The ship and crew were not only radar invisible but invible to the eye as well! Everything worked as planned, and about fifteen minutes later they ordered the men to shut down the generators. The greenish fog slowly reappeared, and the Eldridge began to demterialize as the fog subsided, but it was evidentt to all that something had gone wrong.
When boarded by personnel from shore, the crew above deck were found to be disoriented and nauseous. The Navy removed the crew, and shortly after obtained a new crew. In the end. the Navy decided that they only wanted radar invisibility, and the equipment was altered.
On October 28th, 1943, at 17:15, the final test on the Eldridge was performed. The electomagnetic field generators were turned on again, and the Eldridge became near-invisible; only a faint outline of the hull remained visible in the water. Everything was fine for the first few seconds. and then, in a blindding blue flash, the ship completely vanished. Within seconds it reappeared miles away, in Norwalk, Viginia, and was seen for several minutes. The Eldridge then disappeared from Norwalk as mysteriously as it had arrived, and reappeared back in Philadelphia Naval Yard. This time most of the sailors were violently sick. Some of the crew were simply "missing" never to be seen or heard from again. Some went insane, but, strangest of all, five men were fused to the metal in the ships structure.
The men that survived were never the same again. Those that lived were discharged as "mentally unfit" for duty, regardless of their true condition.

Additional Information:
Project Rainbow was supposed to be an exxperiment conducted upon a small destroyer escort ship during WW II, both in the Philadelphia Naval Yard and at sea; the goal was to make the ship invisible to enemy detection. The accounts vary as to whether the original idea was to achieve invisibility to enemy radar or whether the prize sought after was more profound: optical invisibility. Either way, it's commonly believed that themechanism involved was the generation of an incredibly intense magnetic field around the ship, which would cause refraction or bending of the light or radar waves around the ship, much like a mirage created by heated air over a road on a summer day. the legend goes on to say that the experiment was a complete success.... except that the ship actually disappeared physically for a time, and then returned. They wanted to "cloak" the ship from view, but they got de-materialization and teleportation instead...
It has been claimed that the Philadelphia Experiment was partly an investagation into how Alber Einstein's "Unified Field Theory for Gravitation and Electricity" might be used to advantage in the development of electronic camouflage for ships at sea. Einstein allegedly published his Unified Theory around 1925027 in German, in a Prussian scientific journal, but it was later withdrawn as incomplete. This research was aimed at using intense electomagnetic fields to mask a ship from incoming projectiles, mainly torpedoes. This was later extended to include a study of creating radar invisibility by a similar field in the air rather than in the water.