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ESA assesses ExoMars parachute tears – Astronomy Now

August 13, 2019 - Comment

The ExoMars 2020 parachute deploy sequence. Throughout current exams, the 2 principal chutes have suffered tears of their canopies previous to full inflation. Picture: ESA With launch lower than one yr away, engineers with ESA’s ExoMars program are struggling to grasp and proper issues with the lander’s four-parachute braking system. Final yr, the lander’s enormous



The ExoMars 2020 parachute deploy sequence. Throughout current exams, the 2 principal chutes have suffered tears of their canopies previous to full inflation. Picture: ESA

With launch lower than one yr away, engineers with ESA’s ExoMars program are struggling to grasp and proper issues with the lander’s four-parachute braking system.

Final yr, the lander’s enormous 35-metre-wide principal parachute deployed and carried out as anticipated throughout a low-altitude drop take a look at from a helicopter on the Swedish Area Company Esrange web site. However throughout a subsequent take a look at of all 4 parachutes on 28 Could, from an altitude of 29 kilometres (18 miles), the 2 principal canopies suffered radial tears through the deployment sequence.

Engineers carried out corrective measures and carried out one other high-altitude take a look at of the 35-metre parachute on 5 August. Once more, the deploy sequence executed usually, however the parachute suffered harm previous to inflation. In consequence, the take a look at module descended underneath a pilot chute alone.

“It’s disappointing that the precautionary design variations launched following the anomalies of the final take a look at haven’t helped us to go the second take a look at efficiently,” stated Francois Spoto, ESA’s ExoMars Group Chief. “However as all the time, we stay targeted and are working to grasp and proper the flaw with the intention to launch subsequent yr.”

Throughout a low-altitude drop take a look at final yr, the second stage principal parachute deployed usually. However issues had been skilled throughout two subsequent high-altitude exams. Picture: ESA

The ExoMars 2020 mission consists of the European-built Rosalind Franklin rover and the Russian-built Kazachok touchdown platform. Launch atop a Russian Proton rocket on the Baikonur Cosmodrome is focused between 25 July and 13 August 2020, organising a touchdown on Mars in March 2021. As soon as safely down, the rover is anticipated to drive a number of kilometres, drilling into the soil, accumulating samples and chemically analysing them for indicators of natural exercise. The lander will monitor the native atmosphere.

Utilizing a state-of-the-art warmth protect to guard it from the warmth of atmospheric entry, the lander requires two parachutes, each pulled free in sequential style by its personal pilot chute, to gradual the the spacecraft sufficiently within the skinny martian ambiance for braking rockets to take over for the ultimate descent to the floor.

The primary stage principal parachute measures 15 metres (49 toes) throughout whereas the second stage chute, the biggest ever utilized in a Mars mission, measures 35 metres (115 toes) throughout. For scale, ESA graphics present the second stage chute and its rigging stretching the peak of London’s 96-metre-tall (315 toes) Large Ben tower when totally deployed.

Engineers are assured they’ll have the ability to determine the basis reason for the cover tears and design a repair. One other high-altitude take a look at of the primary stage principal parachute is deliberate by the tip of the yr with a second try and qualify the second stage chute in early 2020.

“Attending to Mars and particularly touchdown on Mars could be very troublesome,” stated Spoto. “We’re dedicated to flying a system that can safely ship our payload to the floor of the Mars with the intention to conduct its distinctive science mission.”



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