Daredevil Felix Baumgartner to plunge from outer space in supersonic suit

SKYDIVING is dangerous - but not nearly as dangerous as skydiving from a plane in outer space.

That can kill you. The temperature can freeze your body, and the lack of air pressure can boil your blood.

Nonetheless, an Austrian daredevil named Felix Baumgartner plans to take the 23-mile plunge from the edge of space, FOXNews.com said today.

And in the process, he hopes to become the first parachutist to break the sound barrier, plummeting toward the ground at 1223km per hour.

But this is no stunt; it's called the Red Bull Stratos project, and the engineers and scientists behind this attempt to break the record for the highest freefall ever - from 36km above sea level - hope it will yield volumes of data that will be used to develop advanced life support systems for future pilots, astronauts, and even space tourists.

And to do it, they've designed a unique supersonic spacesuit.

No one else has tried to use a pressurised suit as Baumgartner plans to; they're typically used to protect jet pilots who eject from their seats - not skydivers who plan to travel faster than sound.

"So we reconfigured the arms and legs on his suit," said Daniel McCarter, who is building the suit at the David Clark Company, which has developed protective suits - called PPAs or pilot protective assemblies - since 1941. The company made the first suits to prevent World War II fighter pilots from blacking out during high-acceleration manoeuvers, not to mention launch entry suits for space shuttle astronauts.

The changes being made to Baumgartner's suit will allow him to dive with his head at a 25- to 35-degree angle and to control his speed. Full pressure suits for pilots are generally configured for comfort in a sitting position, but "for Felix it's in an almost standing position," said Mr McCarter. The shoulder areas also have to be more flexible, and the designers had to ensure that there will be no "binding up" that could prevent him from making critical manoeuvers in freefall.

The suit will essentially be Baumgartner's life-support system, providing oxygen, telemetry, communications and, most importantly, enough pressure to keep him alive. To do this, the suit contains devices known as aneroids, which act like mechanical bellows and respond instantly to changes in atmospheric pressure. When they sense low air pressure, the aneroids trap air in the suit, which then becomes pressurised, squeezing the wearer.

The pressurisation is essential: Above 19km, the lack of air pressure makes it not only difficult to get oxygen into the lungs (which would cause Baumgartner to black out), but it also makes it easy for nitrogen bubbles to escape from the blood, causing an embolism and death. Baumgartner's suit will maintain 3.5 psi of pressure - not so tight that he can't manoeuver his arms and legs, but enough to keep nitrogen bubbles from killing him.

"It feels like getting into a sleeping bag with arms," said Mr McCarter. There's a nylon comfort liner, then a ventilation system that keeps the wearer cool. Next comes the pressurised gas layer, followed by a hand-woven layer called the link net that maintains the shape of the suit. Finally, there's the outer, flame-retardant layer made of the heat- and flame-resistant fiber Nomex.

Team members declined to reveal the cost of the suits (there are three: the original prototype, the one Baumgartner will wear, and a backup), except to agree that the Red Bull Stratos project is a multimillion-dollar effort.

Read more at Fox News

http://www.redbull.com/cs/Satellite/en_INT/Video/Red-Bull-Stratos-021242810640734?p=1242810637490