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1. Camera Systems

Three pressurized housings on aluminum arms will contain a total of three HD, three ultra-high-resolution video and two digital still cameras. Four more cameras record outside and three inside. "We basically built a flying television studio," says Jay Nemeth of FlightLine Films.

2. Outer Fairing

The Gemini shape of the capsule is "really a very elegant way of putting a lot of insulation around a lot of the systems," says chief engineer Bill Dodson. R-24 equivalent foam, covered by a fiberglass shell and fireproof paint, helps guard against temperatures as low as minus 100 F.

3. Liquid Oxygen

Redundant liquid-oxygen tanks with independent lines provide 10 hours of O2 for the 3-hour flight, plus pressurize Baumgartner's suit at altitude. N2 flowing from an oversize liquid-nitrogen tank will keep the cabin's oxygen level to below 30 percent, minimizing fire risk.

4. Pressure Sphere

A pressure sphere, molded from fiberglass and epoxy, sits in a chrome-moly steel load frame "like an egg in a bubble-wrap container," says project director Art Thompson. It will be pressurized to 8 psi—equal to 16,000 feet—but is designed to withstand 50. "It's definitely overbuilt."

(Photograph by Craig Cameron Olsen)

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