everydayisamixtape
Principles of Geometry - Colfax
In 1984 NASA Dryden Flight Research Center and the Federal Aviation Administration (FAA) teamed-up in a unique flight experiment called the Controlled Impact Demonstration (CID), to test the impact of a Boeing 720 aircraft using standard fuel with an additive designed to suppress fire. The additive FM-9, a high molecular-weight long chain polymer, when blended with Jet-A fuel had demonstrated the capability to inhibit ignition and flame propagation of the released fuel in simulated impact tests. On the morning of December 1, 1984, a remotely controlled Boeing 720 transport took off from Edwards Air Force Base (Edwards, California), made a left-hand departure and climbed to an altitude of 2300 feet. It then began a descent-to-landing to a specially prepared runway on the east side of Rogers Dry Lake. Final approach was along the roughly 3.8-degree glide slope. The landing gear was left retracted. Passing the decision height of 150 feet above ground level (AGL), the aircraft was slightly to the right of the desired path. Just above that decision point at which the pilot was to execute a “go-around,” there appeared to be enough altitude to maneuver back to the centerline of the runway. Data acquisition systems had been activated, and the aircraft was committed to impact. It contacted the ground, left wing low. The fire and smoke took over an hour to extinguish.
