Project Excelsior - Test Jumps

Test Jumps

The first test, Excelsior I, was made on November 16, 1959. Kittinger ascended in the gondola and jumped from an altitude of 76,400 feet (23,287 m) . 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 10,000 feet (3,048 m).

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 74,700 feet (22,769 m) and descended in free-fall for 55,000 feet (16,764 m) 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. (See Effects of vacuum on humans.) 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 102,800 feet (31,333 m). The ascent took one hour and 31 minutes and broke the previous manned balloon altitude record of 101,516 feet (30,942 m), 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 −94 °F (−70 °C). In the free-fall stage, he reached a top speed of 614 miles per hour (988 km/h). At an altitude of 17,500 feet (5,334 m), 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. Kittinger held the world record until October 14, 2012 when Felix Baumgartner jumped from 128,097 feet (39,044 m).

An hour and thirty-one minutes after launch, my pressure altimeter halts at 103,300 feet. At ground control the radar altimeters also have stopped-on readings of 102,800 feet, the figure that we later agree upon as the more reliable. It is 7 o'clock in the morning, and I have reached float altitude ... Though my stabilization chute opens at 96,000 feet, I accelerate for 6,000 feet more before hitting a peak of 614 miles an hour, nine-tenths the speed of sound at my altitude.

A plaque attached below the open door of the Excelsior III gondola read, "This is the highest step in the world".