Tag Archives: J73-GE-3D

30 April 1953

Joe Lynch and the North American Aviation YF-86H-1-NA Sabre 52-1975 fighter bomber on Rogers Dry Lake, Edwards AFB. (U.S. Air Force)

30 April 1952, the first North American Aviation F-86H Sabre fighter bomber, YF-86H-1-NA 52-1975, made its first flight with test pilot Joseph A. Lynch, Jr., in the cockpit. It was flown from the Inglewood, California, factory to Edwards Air Force Base for evaluation and testing.

While the F-86A, E and F Sabres were air superiority fighters and the F-86D and L were all-weather interceptors, the F-86H was a fighter bomber, designed to attack targets on the ground with guns bombs and rockets. Larger and with a maximum gross weight nearly 4,000 pounds (1,814 kilograms) heavier than an F-86F, the H model’s J73 engine provided almost 40% more thrust. Though it’s top speed was only marginally faster, the F-86H could take off in a shorter distance and climb faster with a higher service ceiling than the earlier models.

Joseph Lynch
Joseph A. Lynch, Jr.

The two pre-production aircraft were built at Inglewood, California, but all production airplanes were built at Columbus, Ohio. The serial numbers of those F-86H Sabres have the suffix -NH.

The North American Aviation F-86H Sabre was 38 feet, 10 inches (11.836 meters) long with a wingspan of 39 feet, 1 inch (11.913 meters) and overall height of 14 feet, 11 inches (4.547 meters). Empty weight was 13,836 pounds (6,276 kilograms) and gross weight was 24,296 pounds (11,021 kilograms).

The F-86H was powered by a General Electric J73-GE-3D or -3E engine, a single-spool, axial-flow, turbojet engine, which used a 12-stage compressor section with variable inlet vanes, 10 combustion chambers and 2-stage turbine section. It produced 8,920 pounds of thrust (39.68 kilonewtons) at 7,950 r.p.m. The J73 was 16 feet, 8 inches (5.08 meters) long, 3 feet, 3.5 inches (1.03 meters) in diameter and weighed 3,650 pounds (1,656 kilograms).

The F-86H had a maximum speed of 692 miles per hour (1,114 kilometers per hour) at Sea Level and 617 miles per hour (993 kilometers) at 30,000 feet (9,144 meters). The fighter bomber had an initial rate of climb of 12,900 feet per minute (65.53 meters per second) and it could reach 30,000 feet in 5.7 minutes. The service ceiling was 50,800 feet (15,484 meters). With bombs, the F-86H had a combat radius of 403 miles (649 kilometers) at 552 miles per hour (888 kilometers per hour). The maximum ferry range was 1,810 miles (2,913 kilometers).

The two pre-production YF-86Hs were unarmed. The first ten production airplanes were built with six .50 caliber Browning machine guns, the same as the F-86F Sabre, but the remaining F-86H Sabres were armed with four M-39 20 mm autocannon with 600 rounds of ammunition. In ground attack configuration, they could carry rockets and bombs or “Special Store” that would be delivered by “toss bombing.” 473 F-86H Sabres were built before production ended.

The F-86H Sabre became operational in 1954, but by 1958 all that remained in the U.S. Air Force Inventory were reassigned to the Air National Guard. The last one was retired in 1972.

North American Aviation YF-86H-1-NA Sabre 52-1975 during a test flight. A long pitot boom is used for initial instrument calibration. (U.S. Air Force)
North American Aviation YF-86H-1-NA Sabre 52-1975 during a test flight. A long pitot boom is used for initial instrument calibration. (U.S. Air Force)

© 2017, Bryan R. Swopes

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