Project Excelsior was a series of parachute jumps made by Joseph Kittinger of the United States Air Force in 1959 and 1960 from helium balloons in the stratosphere. The purpose was to test the Beaupre multi-stage parachute system intended to be used by pilots ejecting from high altitude. In one of these jumps Kittinger set world records for the longest parachute drogue fall, the highest parachute jump, and the fastest speed by a human through the atmosphere. He held the latter two of these records for 52 years, until they were broken by Felix Baumgartner of the Red Bull Stratos project in 2012, though he still holds the world record for longest time in free fall.
Background
As jet planes flew higher and faster in the 1950s, the Air Force became increasingly worried about the safety of flight crews who had to eject at high altitude. Tests in Operation High Dive with dummies had shown that a body in free-fall at high altitude would often go into a flat spin at a rate of up to 200 revolutions per minute. This would be potentially fatal. Project Excelsior was initiated in 1958 to design a parachute system that would allow a safe, controlled descent after a high-altitude ejection. Francis Beaupre, a technician at Wright-Patterson AFB, Ohio, devised a multi-stage parachute system to facilitate manned tests. This consisted of a small stabilizer or "drogue" parachute, designed to prevent uncontrolled spinning at high altitudes, and a main parachute that deployed at a lower altitude. The system included timers and altitude sensors that would automatically deploy both parachutes at the correct points in the descent, even if the parachutist were unconscious or disabled. To test the parachute system, staff at Wright Field built a high helium balloon with a capacity of nearly that could lift an open gondola and test pilot into the stratosphere. Captain Joseph Kittinger, who was test director for the project, made three ascents and test jumps. As the gondola was unpressurized, Kittinger wore a modified David Clark MC-3A partial pressure suit during these tests, plus additional layers of clothing to protect him from the extreme cold at high altitude. Together with the parachute system, this almost doubled his weight.
Test jumps
The first test, Excelsior I, was made on November 16, 1959. Kittinger ascended in the gondola and jumped from an altitude of. In this first test, the stabilizer parachute was deployed too soon, catching Kittinger around the neck and causing him to spin at 120 revolutions per minute. This caused Kittinger to lose consciousness, but his life was saved by his main parachute which opened automatically at a height of. Despite this near-disaster on the first test, Kittinger went ahead with another test only three weeks later. The second test, Excelsior II, was made on December 11, 1959. This time, Kittinger jumped from an altitude of and descended in free-fall for before opening his main parachute. The third and final test, Excelsior III, was made on August 16, 1960. During the ascent, the pressure seal in Kittinger's right glove failed, and he began to experience severe pain in his right hand from the exposure of his hand to the extreme low pressure. He decided not to inform the ground crew about this, in case they should decide to abort the test. Despite temporarily losing the use of his right hand, he continued with the ascent, climbing to an altitude of. The ascent took one hour and 31 minutes and broke the previous manned balloonaltitude record of, which was set by Major David Simons as part of Project Manhigh in 1957. Kittinger stayed at peak altitude for 12 minutes, waiting for the balloon to drift over the landing target area. He then stepped out of the gondola to begin his descent. The small stabilizer parachute deployed successfully and Kittinger fell for 4 minutes and 36 seconds, setting a long-standing world record for the longest free-fall. During the descent, Kittinger experienced temperatures as low as. In the free-fall stage, he reached a top speed of. At an altitude of, Kittinger opened his main parachute and landed safely in the New Mexico desert. The whole descent took 13 minutes and 45 seconds and set a world record for the highest parachute jump. A plaque attached below the open door of the Excelsior III gondola read, "This is the highest step in the world". Kittinger held the world records for highest parachute jump and highest speed of a human in atmosphere until October 14, 2012 when Felix Baumgartner jumped from and reaching a speed of 377.12 m/s as part of the Red Bull Stratos project, with Kittinger serving as a technical advisor to Baumgartner. Kittinger does, however, still hold the records for longest drogue fall and longest freefall.
