After mission failure, Boeing Starliner returning to Earth early

After mission failure, Boeing Starliner returning to Earth early
After mission failure, Boeing Starliner returning to Earth early

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Nevin Al Sukari - Sana'a - Tory Bruno, CEO of United Launch Alliance, attends a news conference with Jim Chilton, senior vice president, Boeing Space and Launch to discuss the status of the Boeing CST-100 Starliner spacecraft orbital test flight at the Kennedy Space Center in Cape Canaveral, Florida December 20, 2019. — Reuters pic

WASHINGTON, Dec 22 — Boeing’s new Starliner spacecraft will return to Earth today, six days early, after a clock problem prevented a rendezvous with the International Space Station, Nasa and the aerospace giant confirmed yesterday.

The uncrewed Starliner capsule is now scheduled to land today at 05:47 am (12H57 GMT) at the White Sands Missile Range in New Mexico.

The capsule is currently in a low, 250-kilometer (155-mile) orbit. Boeing engineers are programming it to re-enter the atmosphere over the Pacific Ocean.

Parachutes will slow its descent, and huge airbags will be deployed to cushion its desert landing.

Starliner’s failure was the latest serious setback for Boeing, which is still reeling from two fatal crashes of its 737 Max airliner. The crashes, in October 2018 in Indonesia and in March 2019 in Ethiopia, claimed a total 346 lives.

The aerospace company plans to suspend production of the plane in January.

Too much propellant burned

The Starliner capsule was launched Friday from Cape Canaveral, Florida, but shortly after separating from its Atlas V launch rocket its thrusters failed to activate as planned, preventing it from reaching an orbit high enough to meet up with the ISS.

The space station orbits at an altitude of about 400 kilometres above sea level.

After calculating that the craft had burned too much propellant for several minutes — owing to a clock problem — Boeing and Nasa determined that the Starliner would have to return to Earth without fulfilling its planned mission.

Jim Chilton, senior vice president of Boeing’s space and launch division, told reporters that “we started the clock at the wrong time.”

The craft, assuming it was at a different stage of its flight, burned much more propellant than it should have.

Nasa finds a bright side

The flight — carrying only a dummy into space — was meant to be a final dress rehearsal before a crewed flight.

But Nasa Administrator Jim Bridenstine insisted that the mission was not a complete failure.

“The Nasa team and the Boeing team have been working hand in glove to accomplish as many of the test objectives as we can,” he said.

Thus, Starliner was able to establish a communications link with the ISS, and to test in space its docking mechanism as well as its solar panels, batteries, thrusters and heat regulation system.

Chilton said the vehicle’s status is “really excellent.”

But a major test awaits: Starliner’s landing today in the New Mexico desert — one of the most dangerous phases for any space mission, particularly when the vehicle is designed to transport astronauts.

Starliner is set to re-enter the atmosphere at 25 times the speed of sound. Its thermal shield will have to resist the intense heat created by friction with the atmosphere, and its three parachutes will have to deploy correctly.

In a test in November only two parachutes opened, although they proved sufficient for the landing.

“The entry, descent and landing is not for the faint of heart,” Chilton said.

Nasa will have to decide whether to carry out another test flight or to trust that the vehicle is safe to carry astronauts.

Starliner’s first crewed flight had been scheduled for early 2020 — no specific date has been announced — a much-anticipated development ever since Nasa sent up its last space shuttle in 2011.

Another vehicle, the Crew Dragon, has been developed by SpaceX corporation for Nasa. It is expected to be ready for launch in the next several months.

Nasa has committed to pay US$8 billion to Boeing and SpaceX, which in return are to deliver six trips carrying four astronauts each from now to 2024. — AFP

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