Armstrong limit

This pressure is more than twice the ambient pressure at the Armstrong limit.

The Armstrong limit does not delineate the altitude at which it first becomes necessary to wear a pressure suit.

The "Armstrong Limit", the altitude above which water boils at the temperature of the human body, is named after him.

This is far below the Armstrong Limit (61.8 mbar) at which people cannot survive without pressure suits.

Although this would not be breathable by humans, it is above the Armstrong limit and would eliminate the present need for pressure suits.

Armstrong Limit maximum altitude that is survivable without pressurisation (about 62,000 feet)

The Armstrong limit describes the altitude associated with an objective, precisely defined natural phenomenon: the vapor pressure of body-temperature water.

Shortly after passing the Armstrong limit, Baumgartner expressed concerns that his visor heater was not functioning properly.

At or above the Armstrong limit, exposed bodily liquids such as saliva, tears, and the liquids wetting the alveoli within the lungs-but not vascular blood (blood within the circulatory system)-will boil away without a pressure suit and no amount of breathable oxygen delivered by any means will sustain life for more than a few minutes.

This is similar to a flat automobile tire: even with zero gauge pressure, a flat tire at altitude of the Armstrong limit would still have an absolute pressure (pressure relative to a perfect vacuum) of 47 mmHg, that is, it will have the ambient pressure at 19,000 meters, both inside and out of it.