Felix Baumgartner has broken the record for the highest ever skydive by jumping out of a balloon 128,000 ft (39 km) above New Mexico.
Felix Baumgartner, 43, was hoping also to break the sound barrier during his descent – although that mark awaits confirmation.
Video cameras relayed the moment Felix Baumgartner stepped from his balloon capsule to begin his fall to Earth.
It took 10 minutes for him to reach the desert surface below.
Only the last few thousand feet were negotiated by parachute.
Helicopter recovery teams have gone to Felix Baumgartner’s landing site to return him to the mission control centre set up at Roswell airport.
Video cameras relayed the moment Felix Baumgartner stepped from his balloon capsule to begin his fall to Earth
Felix Baumgartner’s efforts have finally toppled records that have stood for more than 50 years.
The previous highest, farthest, and longest freefall was made by retired US Air Force Col. Joe Kittinger, who leapt from a helium envelope in 1960. His altitude was 102,800 ft (31.3 km).
Joe Kittinger, now an octogenarian, was on hand to witness the dramatic jump from the stratosphere. Indeed, he acted as “Capcom” – capsule communicator – throughout the ascent and descent, maintaining voice contact with the much younger man.
None of the new marks set by Felix Baumgartner can be classed as “official” until approved by the Federation Aeronautique Internationale (FAI).
Its representative in Roswell will analyze GPS data recorded on to a microcard in the Austrian’s chest pack. This information will form the basis for any height and speed claims Baumgartner intends to lodge with the FAI.
The adventurer – perhaps best known for leaping off skyscrapers – first discussed the possibility of beating Joe Kittinger’s records in 2005.
Since then, he has had to battle technical and budgetary challenges to make it happen.
What he was proposing was extremely dangerous, even for a man used to those skyscraper stunts.
At an altitude of 120,000 ft (36.5 km), the air pressure is less than 2% of what it is at sea level, and it is impossible to breathe without an oxygen supply.
Others who have tried to break the records for the highest, fastest and longest freefalls have lost their lives in the process.
Felix Baumgartner’s team built him a special pressurized capsule to protect him on the way up, and for his descent he wore a next generation, full pressure suit made by the same company that prepares the flight suits of astronauts.
Although the jump had the appearance of another Felix Baumgartner stunt, his team stressed its high scientific relevance.
The researchers on the Red Bull Stratos project say it has already provided invaluable data for the development of high-performance, high-altitude parachute systems, and that the lessons learned will inform the development of new ideas for emergency evacuation from vehicles, such as spacecraft, passing through the stratosphere.
NASA and its spacecraft manufacturers have asked to be kept informed.
Jon Clark is the medical director on the team. The former shuttle flight surgeon lost his wife in the Columbia accident in 2003.
He said Felix Baumgartner’s experience could help save the lives of future astronauts who get into trouble.
A BBC/National Geographic documentary is being made about the project and will probably be aired in November.
Felix Baumgartner has lifted off on his mission to break a series of freefall records.
Austrian skydiver’s giant helium balloon left the ground at Roswell, New Mexico, a short while ago and is currently on a climb that should take it to more than 120,000 ft (36.5 km).
Felix Baumgartner will then jump out.
The near absence of air at this high altitude means he should break the speed of sound as he falls – a velocity in excess of 690 mph (1,110 km/h).
The journey down should take 10 minutes, about half of it in freefall.
No-one has ever gone so high in a balloon, nor attempted to make such a high skydive.
The current record for the biggest jump of all time is now 52 years old. It was set by US Air Force Col. Joe Kittinger when he leapt from a helium envelope at an altitude of 102,800 ft (31.3 km).
There are immense risks involved in what Felix Baumgartner is trying to do.
Felix Baumgartner has lifted off on his mission to break a series of freefall records
Where he is going, the air pressure is less than 2% of what it is at sea level, and it is impossible to breathe without an oxygen supply.
Others who have tried to break the existing records for the highest, fastest and longest freefalls have lost their lives in the process.
Engineers have done everything possible to limit the risks. They have built the Austrian a special pressurized capsule to carry him aloft under the helium balloon.
He will also be wearing a next-generation, full-pressure suit, an evolution of the orange protective clothing worn by shuttle astronauts on launch.
Although the jump has the appearance of another Felix Baumgartner stunt, his team prefers to stress its high scientific relevance.
The researchers on the Red Bull Stratos project believe it will inform the development of new systems for emergency evacuation from high-performance, high-altitude vehicles. NASA and its spacecraft manufacturers have asked to be kept informed.
There are a few examples of pilots being ejected in supersonic airflows when their planes broke apart in the sky, but there is no detailed data on what happens to the human body as it goes supersonic and then, as it slows, goes subsonic again.
Felix Baumgartner will be instrumented to acquire this new data.
Engineers have incorporated an automatic device in his gear that would deploy a drogue stabilization chute if he gets into trouble.
There is, however, high confidence in Baumgartner’s team that he will complete the task ahead of him. He has been buoyed by the success of two practice jumps that have taken him progressively higher into the stratosphere – from 71,600ft (21.8km) and 97,100ft (29.6km).
The official lift-off time for the balloon was 09:31 MDT (16:31GMT). Mission control at Roswell airport is following every moment of what is likely to be a more than two-hour ascent to the jump altitude.
Baumgartner is in video and radio contact throughout. The only person who will speak to him, however, is Col. Joe Kittinger, who was brought into the team early to advise the Austrian how best to beat the octogenarian’s records.
“We are going to get your goal and your dream accomplished Felix,” Joe Kittinger told Felix Baumgartner just before lift-off.