NORFOLK, va. — Devising a way to one day land astronauts on Mars is a complex problem — but NASA scientists think something as simple as a child’s toy design might help solve the problem.
Safely landing a large spacecraft on the red planet is just one of many engineering challenges the agency faces as it eyes an ambitious goal of sending humans into deep space later this century.
At the National Aeronautics and Space Administration’s Langley Research Center in Hampton, engineers have been working to develop an inflatable heat shield that looks a lot like a supersized version of a stacking ring of doughnuts that infants play with. The engineers think that a lightweight, inflatable heat shield could be deployed to slow the craft to enter a Martian atmosphere much thinner than Earth’s.
Such an inflatable heat shield could help a spacecraft reach the high-altitude southern plains of Mars and other areas that would otherwise be inaccessible under existing technology.
The experts note that rockets alone can’t be used to land a large craft on Mars as can be done on the atmos phereless moon. Parachutes also won’t work for a large spacecraft needed to send humans to Mars, they add.
Hence the inflatable rings. The rings would be filled with nitrogen and covered with a thermal blanket. Once deployed for landing, the rings would sit atop the spacecraft, somewhat resembling a giant mushroom.
“We try to not use propulsion if we don’t have to,” said Neil Cheatwood, senior engineer at Langley for advanced entry, descent and landing systems. “We make use of that atmosphere as much as we can because it means we don’t have to carry all that fuel with us.”
NASA’s leaders acknowledge that getting humans safely to and from Mars as early as the 2030s poses extreme challenges. The agency’s scientists acknowledge they also must design new in-space propulsion systems, advanced spacesuits, long-term living habitats aboard spacecraft — even communication systems for deep space.
Engineers at Langley have been working on the inflatable technology for about a decade and think it is close to being ready for operational use.
“If I had the budget and we had the funding to do it, I think we could get as large a scale as needed for humans in five to 10 years,” Cheatwood said.
