A test version of NASA’s Orion spacecraft descends
under its three main parachutes above the U.S. Army Proving Ground in Arizona in
the agency’s most difficult test of the parachutes system’s performance. NASA is
preparing Orion for its first trip to space in December, a two-hour, four-orbit
flight that will send an uncrewed spacecraft more than 3,600 miles into space
before returning it to Earth to test the performance of many of the spacecraft’s
critical systems needed to carry crew to deep space destinations in the
future.
Image Credit: NASA/Rad Sinyak
NASA completed the most complex and flight-like test of the parachute system
for the agency's Orion spacecraft on Wednesday.
A test version of Orion touched down safely in the Arizona desert after being
pulled out of a C-17 aircraft, 35,000 feet above the U.S. Army's Yuma Proving
Ground. It was the first time some parachutes in the system had been tested at
such a high altitude. Engineers also put additional stresses on the parachutes
by allowing the test version of Orion to free fall for 10 seconds, which
increased the vehicle's speed and aerodynamic pressure.
"We've put the parachutes through their paces in ground and airdrop testing
in just about every conceivable way before we begin sending them into space on
Exploration Flight Test (EFT)-1 before the year's done," said Orion Program
Manager Mark Geyer. "The series of tests has proven the system and will help
ensure crew and mission safety for our astronauts in the future."
After Orion's free fall, its forward bay cover parachutes deployed, pulling
away the spacecraft's forward bay cover, which is critical to the rest of the
system performing as needed. The forward bay cover is a protective shell that
stays on the spacecraft until it has reentered Earth's atmosphere. The
parachutes that slow Orion to a safe landing speed are located under the cover,
so the cover must be jettisoned before they can be unfurled.
Engineers also rigged one of the main parachutes to skip the second phase of
a three-phase process of unfurling each parachute, called reefing. This tested
whether one of the main parachutes could go directly from opening a little to
being fully open without an intermediary step, proving the system can tolerate
potential failures.
The test also marked the last time the entire parachute sequence will be
tested before Orion launches into space in December on its first space flight
test, EFT-1. During the flight, an uncrewed Orion will travel 3,600 miles into
space, farther than any spacecraft built to carry humans has been in more than
40 years. Orion will travel at the speed necessary to test many of the systems
critical to NASA's ability to bring astronauts home safely from missions to deep
space, including an asteroid and eventually Mars.
During its return to Earth, Orion will reach a speed of up to 20,000 mph and
experience temperatures near 4,000 degrees Fahrenheit. Once Orion has made it
through the atmosphere, the parachute system, with two drogue parachutes and
three massive main parachutes that together cover almost an entire football
field will be responsible for slowing it down to just 20 mph for a safe
splashdown in the Pacific Ocean.
Orion's next parachute test is set for August and will test the combined
failure of one drogue parachute and one main parachute, as well as new parachute
design features. It is one of three remaining tests needed to demonstrate the
system's capability for human missions, but does not need to be completed before
Orion's first flight later this year.
For more information about Orion, visit:
NASA
Guillermo Gonzalo Sánchez Achutegui
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