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After mission failure, Boeing Starliner returning to Earth early
WASHINGTON, Dec 22, 2019 (BSS/AFP) – Boeing’s new Starliner spacecraft will
return to Earth on Sunday, six days early, after a clock problem prevented a
rendezvous with the International Space Station, NASA and the aerospace giant
confirmed Saturday.
The uncrewed Starliner capsule is now scheduled to land Sunday 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 kilometers 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 Sunday 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 $8 billion to Boeing and SpaceX, which in return
are to deliver six trips carrying four astronauts each from now to 2024.
BSS/AFP/MSY/0810 hrs