The cockpit of a fighter jet is a dangerous and busy place to work. High-speed fighter aircraft maneuvers can produce g-forces strong enough to knock a pilot unconscious and the pace and complexity of modern aerial combat can mentally “overload” a pilot and lead to spatial disorientation. Both can prove deadly.
Thankfully, innovative systems have been developed to reduce these risks and help eliminate the leading cause of F-16 pilot fatalities: crashing an undamaged aircraft into the ground. The Automatic Ground Collision Avoidance System (Auto GCAS) was purpose-built to prevent these deadly crashes and has already been credited with saving at least seven pilots and six F-16s since the system entered service with the U.S. Air Force in late 2014.
Seven Saves and Counting
A recently released video from the head-up-display (HUD) of an F-16 illustrates how the Auto GCAS helped save the life of an F-16 student pilot who lost consciousness during a training mission.
The student pilot, training with the Arizona Air National Guard’s 152nd Fighter Squadron, succumb to G-Induced Loss of Consciousness (GLOC) during a high-speed maneuver. As the unconscious pilot’s F-16 careened toward the ground, the Auto GCAS determined that a ground collision was imminent and initiated a fly up maneuver to roll the F-16’s wings level and upright as the pilot regained consciousness and added Gs to the recovery, saving both pilot and plane.
What is Auto GCAS?
The Auto GCAS, developed jointly by Lockheed Martin, the Air Force Research Laboratory and the National Aeronautics and Space Administration (NASA), is designed to reduce incidents of what is known as controlled flight into terrain, or CFIT. According to U.S. Air Force statistics, CFIT incidents account for 26 percent of aircraft losses and a staggering 75 percent of all F-16 pilot fatalities.
According to Ed Griffin, Lockheed Martin’s program manager for the Automatic Collision Avoidance Technologies (ACAT) Fighter Risk Reduction Program, the system consists of a set of complex collision avoidance and autonomous decision making algorithms that utilize precise navigation, aircraft performance and on-board digital terrain data to determine if a ground collision is imminent. If the system predicts an imminent collision, an autonomous avoidance maneuver—a roll to wings-level and +5g pull—is commanded at the last instance to prevent ground impact.
The Auto GCAS executes in the background and automatically provides protection whether the pilot is distracted, task-saturated, incapacitated, or unconscious. No action is required by the pilot, though the system does have a pilot override function.
“Based on the data we’ve seen so far, the Auto GCAS is doing exactly what it was designed to do: save priceless lives and valuable military aircraft,” said Griffin. “Many aviation professionals believe autonomy is emerging as the new frontier in aviation and Auto GCAS currently represents the leading edge of autonomy as it applies to manned platforms.”
A Close Collaboration
All of this success did not come overnight. Auto GCAS is the result of research collected by Lockheed Martin’s Skunk Works®, AFRL and NASA spanning nearly three decades. An Air Force F-16D was ultimately selected as a test platform for the system and related flight-testing began in 2009 at the NASA Armstrong Flight Research Center (AFRC) located at Edwards Air Force Base, California.
Lockheed Martin worked closely with its U.S. Government and Air Force customers to refine this game-changing Auto GCAS capability and help deliver it to the warfighter. Auto GCAS has already saved numerous pilots and will save many more in the future as the system is implemented more broadly across the global F-16 fleet and applied to other aircraft platforms.
Saving Tomorrow's Pilots
In addition to the Auto GCAS, Lockheed Martin and the U.S. Government have also developed an Automatic Air Collision Avoidance System (Auto ACAS). As its name suggest, Auto ACAS is designed to avoid air-to-air collisions. Together, the two systems form the Automatic Integrated Collision Avoidance System (Auto ICAS), the world’s first fully automatic integrated combat flight safety system designed to prevent both air-to-air and air-to-ground collisions.
In recognition of the Auto ACAS, Lockheed Martin and the AFRL were presented with a 2016 Aviation Week Laureate Award for the development and flight testing of the system, “which predicts collisions and automatically maneuvers fighter aircraft to avoid mid-air crashes in training exercises. The system is projected to save 34 aircraft, 25 pilot lives and $2.3 billion over the next 15 years.”
The F-16 Auto GCAS system is currently being integrated into the U.S. Air Force’s F-16 fleet and the Air Force and Lockheed Martin plan to develop similar systems for the F-22 and F-35. Current plans call for fielding an Auto GCAS on the F-35 by 2019. The F-35 Joint Program Office estimates the Auto GCAS will prevent more than 26 ground collisions during the service of the F-35 fleet.
As Col. Chris Baird, former U.S. Air Force F-16 System Program Manager, put it, “It’s not just about killing the bad guys with airpower. It’s also equally about saving the good guys.”