Skydiver to attempt record-breaking jump from stratosphere

Mon Oct 8, 2012 5:45pm EDT
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By Irene Klotz

(Reuters) - An Austrian adventurer is preparing to skydive from a balloon flying 23 miles above New Mexico on Tuesday, seeking to break a long-standing altitude record - and the sound barrier - in the process.

Felix Baumgartner, a 43-year-old helicopter pilot, hot-air balloonist and professional skydiver, would become the first person to freefall from that high up in the stratosphere, a region more like the vacuum of space than the oxygen-rich atmosphere closer to Earth.

Weather will be key. Baumgartner's team decided to wait out a cold front moving through the area on Monday before launching the massive but fragile helium balloon that will carry him to an altitude of 120,000 feet above Roswell, New Mexico.

If the weather is good, the balloon will be launched at dawn on Tuesday, around 7 a.m. New Mexico time (9 a.m. EDT/1300 GMT). It takes about 2.5 to 3 hours to reach 120,000 feet.

The 30-million-cubic-foot (850,000-cubic-meter) plastic balloon, which is about one-tenth the thickness of a Ziploc bag, cannot handle winds greater than 6 miles per hour (9.7 km per hour). The balloon will carry a specially made space capsule where Baumgartner will spend the ride into the stratosphere.

Baumgartner hopes to break the current record of 102,800 feet for the highest-altitude freefall, a milestone set in 1960 by U.S. Air Force Colonel Joe Kittinger.

By jumping from 120,000 feet Baumgartner will also break the sound barrier. With virtually no air to cushion his fall, he is expected to reach the speed of sound, which is 690 mph at that altitude, after about 35 seconds of freefall.

He will stay supersonic for nearly a minute and should freefall for a total of 5 minutes and 35 seconds.   Continued...