F-15C g-loc causing g-overload and structural damage

Military aircraft accidents/mishaps.
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marsavian

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Unread post04 Jan 2020, 02:59

Do the latest FBW versions have automatic FCS g-limits ?

https://www.popsci.com/story/technology/f-15-incident/

In late March of 2019, in a military operating area over Oregon, a student pilot and an instructor were conducting a two-aircraft training mission on basic fighter maneuvers. Each aviator was in their own F-15C jet. It was early afternoon, and the aircraft were at about 18,000 feet. The student made a turn, and during that maneuver, began to experience G-forces. About six seconds into that turn, those Gs caused blood to travel downwards from the pilot’s head, and the student passed out.

Eleven seconds later, after waking up, the pilot began to recover by putting engines to idle, and pulling back on the control stick. It was the correct course of action, according to the Air Force, but that maneuver subjected the jet to more stress than it was structurally designed to withstand. It endured a phenomenon called "over G-pull.” The wings, tail, and fuselage were all seriously damaged by the incident, adding up to a cost of more than $2.5 million. The Air Force has still not decided precisely what to do with the aircraft. (F-15C models cost $29.9 million, in 1998 dollars.)

Both F-15s landed safely, and neither pilot involved in the mission was injured.

The incident highlights the extreme forces that fighter pilots must manage as they operate high-performance aircraft. The student experienced G-induced loss of consciousness, or GLOC. The Air Force Safety Center carefully tracks how often pilots pass out, and in the last fiscal year—from October 1, 2018 to September, 30, 2019—there were 12 incidents, a small increase from past years. The 10-year average, according to the Safety Center, is about seven GLOC incidents per year. A majority of them involved students, and the one in Oregon was the only event that caused damage. Five of the 12 took place in F-16s, while others occurred in trainer aircraft like the T-6 or T-38, and one in an F-22.
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n3sk

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Unread post08 Jan 2020, 01:33

No it doesn’t, not like the F-16 or F-18. You can over G the aircraft.

Bent aircraft or a smoking hole in the ground??? Glad the pilot walked away! The government can always print more paper.

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