XP5Y Wreckage Today: The 70-Year Mystery Solved Off Point Loma
What Lies Beneath: Uncovering a Lost Aviation Treasure
For seven decades, a chapter of aviation history has been sleeping in the dark, cold waters off the coast of San Diego. The question that has haunted historians and wreck divers alike is simple yet profound: where is the XP5Y wreckage today? This was no ordinary aircraft. A pioneering turboprop flying boat, a marvel of its time that set records and promised a new era of naval aviation, only to vanish after a dramatic bailout in 1953. The story of its disappearance became a local legend, a ghost tale whispered among sailors and pilots. Now, thanks to a dedicated team of researchers and underwater explorers, the mystery has been solved. The wreck of the Convair XP5Y-1, the first of its kind, has been found. This is the complete story of the aircraft, its fatal test flight, the incredible rescue of its crew, and the modern expedition that finally located its remains on the ocean floor.
The Dawn of the Tradewind: Convair's Ambitious Flying Boat
A Navy Vision for a Multi-Role Marvel
In the post-World War II era, the U.S. Navy was looking toward the future. They needed a versatile, long-range maritime patrol aircraft that could also serve as a troop transport, flying ambulance, and fuel tanker. This ambitious requirement led to the Convair Model 117, which the Navy designated as the XP5Y-1 "Tradewind." The design was radical for its time, featuring a high-mounted wing with four powerful turboprop engines—the Allison T40—driving contra-rotating propellers. This configuration promised immense power and efficiency. The Navy’s vision was clear: create a single platform that could dominate the vast ocean spaces.
Engineering a Record-Setter
The Tradewind’s capabilities were impressive. It could lift a payload of 8,000 lbs and had a range of 3,450 miles (5,552 km) without external stores. Its defensive armament as a patrol craft was formidable, intended to mount five pairs of 20 mm guns—two on each side fore and aft, and one pair behind the rudder. But its most famous attribute was speed and endurance. After its first flight on April 18, 1950, at San Diego, the prototype was shipped to the Naval Air Test Center at Patuxent River, Maryland. There, in the summer of 1953, despite continued problems with the notoriously complex T40 engines, the aircraft achieved something remarkable. It established a turboprop endurance record of 8 hours and 6 minutes. This record still stands today, a testament to the aircraft's potential that was ultimately undermined by its mechanical gremlins.
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The Fateful Flight: Crash and Miraculous Bailout
The Test Flight Over Point Loma
The specific XP5Y-1 that would become a wreck had a busy test history. After its record-setting flight, it remained at Patuxent River for six months, conducting thirty test flights. These included unusual missions like dropping paratroopers from Fort Bragg, North Carolina, and an epic nine-hour-and-six-minute flight. After this grueling test schedule, the aircraft was ferried back to its birthplace, San Diego, for further evaluation under the auspices of the Convair company. On November 22, 1953, the crew was engaged in a local test flight on behalf of the Convair company over the Pacific Ocean near Point Loma.
Engine Failure and a Daring Escape
During the flight, the aircraft suffered catastrophic engine problems. The complex T40 powerplants had proven to be a persistent Achilles' heel. With little progress being made to solve these issues and the situation becoming critical, the crew faced a dire emergency. In a sequence of events that required immense courage and precision, all 11 crew members decided to bail out and abandon the aircraft. The pilotless Tradewind dove into the seas and crashed off Point Loma. The bailout itself was a high-risk maneuver over ocean waters. Miraculously, all 11 occupants were rescued. The aircraft, however, was destroyed on impact with the water, its wreckage sinking to the bottom, lost to history and the deep.
The Search for History: Expedition Unknown Joins the Hunt
A Local Legend and a TV Show Idea
Fast forward nearly 70 years. The story of the XP5Y crash was a piece of local wreck history and information known to only a few, including Tyler Stalter. Tyler, described as an unending fountain of local wreck history, was the person who came up with the whole idea for an episode of the popular television series Expedition Unknown (hereafter EXU). He mentioned the XP5Y experimental aircraft that had crashed off the coast of San Diego to the show's researchers. The EXU team did some more research and, recognizing the compelling mix of aviation history, a dramatic rescue, and an unsolved mystery, decided that it would make for an interesting episode and we were off and running.
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The Orca Maritime Team's Breakthrough
The search was not a blind endeavor. The EXU team partnered with the expert Orca Maritime team, who were already searching for another legendary lost aircraft—the XP5Y—for the Expedition Unknown Series 12, Episode 8 TV show they had filmed a couple of years prior. This prior work meant they had sophisticated side-scan sonar and expertise in the challenging conditions off Point Loma. Their focused search pattern and technological prowess finally paid off. The Orca Maritime team found this Tradewind wreck while methodically scanning the seabed. The discovery confirmed local accounts and naval records, pinpointing the final resting place of the first XP5Y.
The XP5Y and P5Y: Understanding the Aircraft
From Experimental to Operational: The P5Y
It’s important to distinguish between the experimental prototype and the production model. The crashed aircraft was the XP5Y-1. Following its test program and the tragedy, the Navy sought to refine the design. Their response was the Model 117-2, which entered production as the P5M Marlin. In this operational configuration, the Navy called it the P5Y (though it’s more commonly known as the P5M). The production Marlin served successfully for years as a patrol seaplane, fulfilling the Navy’s multi-role vision without the catastrophic engine issues of its predecessor, as it used more reliable Allison T56 engines.
Context in Military Aviation History
The XP5Y’s story exists within a larger tapestry of accidents and incidents involving military aircraft. Lists of such events, grouped by the year, document countless test flights, training mishaps, and operational losses. It’s critical to note that not all of the aircraft were in operation at the time of their recorded incidents; many, like the XP5Y, were in testing. Furthermore, combat losses are not included in these lists except for very few cases denoted by singular circumstances. The XP5Y crash is a pure test flight accident, a common but often overlooked risk in pushing the boundaries of aerospace technology.
The Wreck Site Today and Its Significance
A Time Capsule on the Ocean Floor
While the exact coordinates are typically kept vague to protect the site, the XP5Y wreckage today rests in the deep waters off Point Loma. It is not a pristine museum piece; decades underwater have taken their toll. Yet, it remains a significant aviation treasure. For maritime archaeologists and aviation enthusiasts, it is a time capsule. The wreck offers a rare opportunity to study the construction techniques of early turboprop flying boats and perhaps gain final clues about the specific sequence of the engine problems that doomed the flight. The coast guard along with federal, state and local agencies would be involved in any modern recovery or investigation, but the site is now primarily one of historical research and remembrance.
Legacy of the Crew and the Record
The human element of this story is paramount. The 11 crew members—whose names are recorded in archives like those of the EAA Warbirds of America and incident reports (including personnel like Marvin Rea Weller, Robert Vencil Skala, Clifford Polson Bengston, and Rans Raymond Estis on other related flights)—exemplified the bravery of test pilots and their crews. Their successful bailout from a diving, engine-failed flying boat remains a standout feat of airmanship. Furthermore, the aircraft’s turboprop endurance record of 8 hours, 6 minutes, set just months before its loss, still stands today. This enduring record highlights the paradox of the XP5Y: a flawed machine that nonetheless touched the pinnacle of performance.
Setting the Record Straight: Fact vs. Fiction
Debunking Myths and Clarifying History
With any old mystery, myths accumulate. I want to set the record straight based on the verified evidence. The crash was not a combat loss, nor was it due to enemy action. It was a test flight accident stemming from engine problems with the innovative but troublesome T40 turboprop system. The airplane was destroyed upon impact with the sea, but the rescue of all 11 occupants was a complete success, a fact often lost in the retelling of the wreck’s discovery. The XP5Y was the experimental model; the subsequent successful P5Y/Marlin was a different, improved variant. The wreck found is definitively the first XP5Y-1, BuNo. 59554, which first flew in San Diego in 1950.
Resources for the Dedicated Researcher
For those seeking even more exhaustive details, the aircraft crash record office and the air safety network are primary resources. Another valuable, if niche, source is the Dutch Scramble website Brush and Dustpan database, which meticulously documents military aviation accidents. These resources help separate the singular circumstances of a particular crash from broader trends, providing the factual backbone for stories like this one.
Conclusion: More Than Just a Wreck
The discovery of the XP5Y wreckage today is far more than a checkmark on a treasure-hunting list. It is the closing of a historical loop that began with ambition, soared with a record-breaking flight, plunged into tragedy, and ended in a miraculous rescue. The aircraft represents the risky, innovative spirit of early jet and turboprop age, where every new design was a gamble. Its story is a microcosm of test aviation: the thrill of achievement, the shadow of failure, and the ultimate respect for those who fly the untested edges.
Now, 70 years later, as Josh (presumably from Expedition Unknown) joins a team scouring the ocean floor hundreds of feet below to find a lost aviation treasure, the focus shifts from the crash itself to the legacy. The wreck is a permanent monument to the Convair company’s engineers, the Navy’s vision, and the 11 crew members who walked away from a diving aircraft. It answers the question of "where" but deepens the appreciation for "why" and "how." The Tradewind is no longer just a footnote in a list of accidents and incidents. It is a located, tangible piece of history, finally at rest on the seafloor, its story told in full—from its first flight over San Diego to its final dive off Point Loma, and its rediscovery by a team passionate about keeping these incredible tales from being lost to the deep.
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