The Cornfield Bomber, the Convair F-106 Delta Dart That Ejected Its Pilot and Landed Itself Intact in a Montana Snow Field

On February 2, 1970, a Convair F-106 Delta Dart touched down gear-up in a snow-covered wheat field near Big Sandy, Montana - engine still running, pilot nowhere aboard. The aircraft had recovered from a locked flat spin on its own after Captain Gary Foust ejected, flown a descending path over the valley, and made an unassisted belly landing that left the airframe largely intact. It was subsequently repaired, returned to service, and eventually preserved at the National Museum of the United States Air Force in Dayton, Ohio, where it remains today as serial number 58-0787.

What Was the F-106 Delta Dart?

The Convair F-106A - called “the Six” by the pilots who flew it - was a pure delta-wing interceptor designed around a single mission: stopping Soviet strategic bombers before they reached American cities. The Air Force accepted the first operational aircraft in 1959, and the design reflected everything the Air Defense Command needed. A single Pratt & Whitney J75 engine pushed it past Mach 2. Service ceiling reached 60,000 feet. Weapons were carried internally in a bay that opened briefly for a firing sequence, keeping the airframe aerodynamically clean.

The aircraft had presence. The long needle nose, the enormous delta planform, the broad fuselage at the wing root - everything about it was engineered for speed and altitude. Pilots in the Six community were a small fraternity, and by most accounts they were proud of what they flew.

The Flat Spin Problem

The Six also had a reputation in certain corners of the flight envelope.

Delta wings behave differently from conventional tapered wings at low speeds and high angles of attack. Under conditions of hard maneuvering, a high-performance delta can depart controlled flight and enter a flat spin - and in an aircraft like the F-106, a flat spin was not recoverable.

The distinction matters. In a normal spin, the nose is pitched well below the horizon. Airspeed can build through the rotation, making recovery inputs effective: break the rotation, unstall the wings, pull out. In a flat spin, the aircraft is nearly level. Rotation rate is higher. The lift and drag forces acting on the wings and fuselage are balanced in a self-reinforcing way that standard control inputs cannot break. The aircraft is locked, spinning, and descending, with no aerodynamic path back to controlled flight.

In a jet fighter in a flat spin, the ejection seat is the only exit.

February 2, 1970: The Departure

Captain Foust was airborne out of Malmstrom Air Force Base near Great Falls, working through air combat maneuvering exercises - high angles of attack, tight turns, aggressive energy management. The kind of flying that probed the edges of the envelope because knowing the edges was the job.

Somewhere in that maneuvering, the Delta Dart departed controlled flight.

Foust ran the recovery. Every input the manuals described. The aircraft did not respond. The spin was locked and the altitude was unwinding. He ran the checklist, applied the inputs, waited for the aircraft to respond.

It did not.

He pulled the ejection handles. The seat fired him clear of the cockpit. His parachute opened, he landed in a field near the aircraft’s eventual resting place, and he was recovered by search teams without serious injury. He had done exactly what the training demanded.

Why the Aircraft Recovered

The moment Foust left the aircraft, something changed in the aerodynamic equation.

His weight - roughly 190 to 200 pounds of pilot and ejection seat equipment - was gone. The center of gravity shifted. The balance point of the airframe moved aft relative to where it had been during the spin. The aerodynamic forces that had been holding the flat spin in its locked state were now acting on a slightly different aircraft.

The nose began to drop. The rotation began to slow.

Nobody programmed this. No system said in the event of ejection, continue flying. Physics does not take instructions. When the aerodynamic balance changed, the aircraft responded to what it had become. The delta wing found lift again. The nose settled into a pitch attitude producing forward flight. The engine kept running.

The Landing

What followed was approximately as strange as anything recorded in American military aviation history. The F-106, unoccupied and without autopilot or guidance, flew a wide descending path over the valley floor. The delta wing, the engine, and the Montana atmosphere found a rough equilibrium as altitude decreased.

The aircraft came over the edge of a farm field and touched down on its belly in the snow. The fuselage underside, the closed weapons bay doors, and the smooth belly skin became the landing surface. The aircraft slid approximately 150 feet and came to rest upright in the middle of the wheat field.

The engine was still running when the rancher walked up to it.

The Damage Assessment and Return to Service

Recovery crews from Malmstrom found an aircraft that had survived better than anyone had a right to expect.

The belly had taken abrasion from the slide. Landing gear doors were bent. Some underside skin panels were damaged. The nose section showed impact marks. But the main airframe was intact. The engine was intact. Avionics, weapons systems, and internal equipment had come through a locked flat spin and an unassisted gear-up landing in serviceable condition.

The Air Force decided to recover it.

Serial number 58-0787 was transported to a depot facility. After careful repair and assessment, it was returned to airworthy status. It went back to squadron duty, back to alert hangars and training sorties over Montana. For years, it flew the same profiles as every other Six in the inventory. Its history was known throughout the small Six community, but it carried the same mission.

The name Cornfield Bomber stuck immediately - because it was exactly and completely accurate.

What This Meant for Aircraft Design

The flat spin problem was not unique to the F-106. The century-series fighters broadly had departure characteristics that demanded respect. High-performance delta and swept-wing designs operating at high angles of attack were susceptible, and the pilots who flew them in the 1950s and ’60s understood the stakes.

The engineering challenge was real. You cannot safely test flat spin recovery by putting a pilot in a flat spin at low altitude on purpose. Spin tunnel facilities at Langley and Wright-Patterson could model some of the aerodynamics, but full-envelope departure behavior was difficult to validate without data from actual events. Every real flat spin that ended in ejection was expensive data.

What happened over Big Sandy produced data of a different kind. The ejection itself changed the outcome. That observation fed into ongoing research about departure resistance and recovery - research that informed the generation of aircraft that followed.

The F-16, which entered service in the late 1970s, used relaxed static stability with fly-by-wire control laws precisely to gain that edge. The design is aerodynamically unstable without computers, but fly-by-wire can sense the beginning of a departure and apply corrective inputs faster than any human. The Six didn’t have that. It was built on the technologies of its era. When it found a situation beyond those technologies, it relied on physics.

Where the Aircraft Is Today

Serial number 58-0787 ended its operational career as all aircraft do, and it found its way to the National Museum of the United States Air Force in Dayton, Ohio, where it is preserved today.

The museum holds the Memphis Belle, the Bockscar, the XB-70 Valkyrie. Aircraft from every era of American military aviation, from early biplanes to stealth fighters. The Cornfield Bomber occupies its own category among all of them: the airplane that saved itself when every human element had been removed from the equation.

Captain Gary Foust made the right call when ejection was the only option, and he survived. The aircraft made the unexpected call - the one nobody had written into any manual - and it survived too.

Both of them came home from Big Sandy.

Key Takeaways

• On February 2, 1970, F-106 Delta Dart serial 58-0787 recovered from a locked flat spin unassisted after Captain Gary Foust ejected near Big Sandy, Montana
• The recovery was caused by the shift in center of gravity after the pilot’s mass left the aircraft - an unintended but physics-driven outcome
• The aircraft made a gear-up belly landing in a snow-covered wheat field, slid roughly 150 feet, and came to rest with its engine still running
• After depot-level repairs, the aircraft returned to Air Defense Command service for years before eventual retirement
• The incident contributed to research on departure resistance that informed fly-by-wire designs like the F-16, which can apply corrective inputs faster than any human pilot