2 February 1970: At approximately 9:50 a.m., three Convair F-106A Delta Dart supersonic interceptors of the 71st Fighter Interceptor Squadron, 24th Air Division, based at Malmstrom Air Force Base, Montana, were engaged in an air combat training mission.
1st Lieutenant Gary Eugene Foust was flying F-106A-100-CO 58-0787, an airplane usually flown by the squadron’s maintenance officer, Major Wolford.
During the simulated combat, Lt. Foust entered into a vertical climb with his “opponent,” Captain Tom Curtis, who was also flying an F-106, and they both climbed to about 38,000 feet (11,600 meters) while using a “vertical rolling scissors” maneuver as each tried to get into a position of advantage.
Lt. Foust’s interceptor stalled and went in to a flat spin. Captain Curtiss described it: “The aircraft looked like the pitot tube was stationary with the aircraft rotating around it. Very flat and rotating quite slowly.”
Foust tried all the recovery procedures but could not regain control of the Delta Dart. With no options remaining, at about 15,000 feet (4,572 meters), Foust ejected from the apparently doomed airplane.
After the pilot ejected, the F-106 came out of the spin and leveled off. With its engine still running, -787 continued flying, gradually descending, until it slid in to a landing in a wheat field near Big Sandy, Montana. Eventually the airplane ran out of fuel and the engine stopped at about 12:15 p.m.
Lieutenant Foust safely parachuted into the mountains and was soon rescued.
58-0787 was partially disassembled by a maintenance team from Hill Air Force Base, Utah, and loaded on to a rail car. It was then transported to the Sacramento Air Logistics Center at McClellan Air Force Base, Sacramento, California, where it was repaired and eventually returned to flight status with the 49th Fighter Interceptor Squadron, 21st Air Division, at Griffiss Air Force Base, New York.
After the Convair Delta Dart was retired from active service, 58-0787 was sent to the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio.
The airplane was a development of the earlier F-102A Delta Dagger, and was initially designated F-102B. However, so many changes were made that it was considered to be a new aircraft.
The F-106A is 70 feet, 8.78 inches (21.559 meters) long with a wingspan of 38 feet, 3.5 inches (11.671 meters). The total area of the delta wing is 697.83 square feet (64.83 square meters). The angle of incidence was 0° and there was no dihedral. The leading edges were swept aft 60°. The top of the vertical fin was 20 feet, 3.3 inches (6.180 meters) high. The Delta Dart weighs 24,028 pounds (10,899 kilograms) empty, and has a maximum takeoff weight (MTOW) of 39,195 pounds (17,779 kilograms).
The interceptor has a cruise speed of 516 knots (594 miles per hour/956 kilometers per hour), and a maximum speed of 1,153 knots (1,327 miles per hour/2,135 kilometers per hour) at 35,000 feet (10,668 meters). The F-106A had a maximum rate of climb of 41,400 feet per minute (210 meters per second) at Sea Level. It could climb to 50,000 feet (15,240 meters) in 5 minutes. The service ceiling was 52,700 feet (16,063 meters). Its combat radius was 426 nautical miles (490 statute miles/789 kilometers) with maximum internal fuel (1,514 U.S. gallons/5,731 liters). The maximum ferry range was 1,571 nautical miles (1,808 statute miles/2,909 kilometers), when carrying an additional 454 gallons (1,719 liters) in two external tanks.
The Delta Dart was armed with four GAR-3A radar-homing, or -4A (AIM-4F, -4G) infrared-homing Falcon air-to-air guided missiles, and one MB-1 (AIM-2A) Genie unguided rocket with a 1.5 kiloton W-25 nuclear warhead. The missiles were carried in an internal weapons bay. In 1972, the General Electric M61A1 Vulcan 20mm cannon was added to the rear weapons bay with 650 rounds of ammunition. (The number of gun-equipped Delta Darts is uncertain.)
Convair built 342 F-106 interceptors. 277 were F-106As and the remainder were F-106B two-seat trainers.
© 2024, Bryan R. Swopes
