How the Columbia shuttle disaster changed spacecraft safety forever
By Clara Moskowitz
Published January 30, 2013
Ten years after the devastating Columbia space shuttle accident that took the lives of seven astronauts, NASA is building a new spacecraft that will take humans farther into space than ever before, and will incorporate the safety lessons learned from the disaster that befell the agency Feb. 1, 2003.
Later analysis found that Columbia was doomed during its launch, when a small bit of foam insulation broke off the shuttle's external fuel tank and tore a hole in the orbiter's wing. That hole prevented Columbia from withstanding the scorching heat of re-entry.
Afterward, the independent team that investigated the accident, called the Columbia Accident Investigation Board (CAIB), found a number of factors, from the safety culture at NASA to the design of the shuttle, that led to the disaster. [Photos: The Columbia Space Shuttle Tragedy]
'It's especially important to us that were here during the Columbia accident, because they were our friends, too.'
- Dustin Gohmert, NASA crew survival engineering team lead
All of the lessons the agency learned were incorporated into every subsequent flight NASA flew, and are now being used to inform the design of its next-generation spaceship, Orion. That vehicle is slated to carry people to asteroids, the moon and Mars sometime in the mid-2020s.
The Columbia investigation exposed a number of flaws in the design of the shuttle's crew cabin, including its seats, seatbelts, spacesuits and life support system. Each of these has been redesigned for Orion.
NASA looked to the formfitting seats used in professional race vcars, which provide even support to every part of the body, offering extreme cushioning and shock absorption during a crash. Orion designers even fine-tuned the vibration frequency of the seats to have different resonances than the internal organs of a human body.
The astronaut spacesuits were also completely redesigned for Orion. The Columbia investigation board found that the crewmembers didn't have time to configure their suits to protect against depressurization, which occurred rapidly. In fact, some of the astronauts were not wearing their safety gloves, and one didn't even have a helmet on, because of how quickly the accident took place. [Columbia Shuttle Disaster Explained (Infographic)]“In the case of Orion, the suits will instantaneously, and without any action of the crew, inflate and protect from the loss of pressure," Gohmert said.
The capsule life support system was also upgraded to provide a constant flow of oxygen to the crew, even with their helmet visors up and locked, which wasn't possible in the shuttle.
Each of these changes addresses flaws exposed by the Columbia shuttle disaster. Yet Gohmert said none of these upgrades alone would have made a difference during the disaster.
Capsule vs. space plane
Perhaps the largest change from shuttle to Orion is the shift from a winged space plane design to the cone-shaped capsule, which sits atop the rocket rather than next to it.
"When we went to the capsule, we went from a side-mounted spacecraft to a forward-mounted one," said Julie Kramer White, Orion chief engineer. "Therefore, it's not exposed to debris environments, which was obviously a huge issue for Columbia."
This configuration also allows the crew compartment of the capsule to be ejected from the top of the rocket stack in the case of an emergency on the launch pad or during liftoff. Such an escape would not have been possible for the crew cabin of the space shuttle.
Of course, the shuttle had capabilities that no capsule has — namely, the ability to haul large, heavy cargos, such as the building blocks of the International Space Station, inside its cargo bay, White pointed out.
Moreover, the culture of safety at NASA has changed for the better since the days of Columbia, Gohmert said.
"The reaction has been very positive around all of NASA in terms of giving us the capacity to make these safety improvements," he said. "Previously, it was difficult to implement some of the safety features as we'd hoped. Now it really is on the forefront of everyone's mind."