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Ingenuity Helicopter flies faster, farther on 3rd Mars flight

By Steve Crowe | April 26, 2021

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NASA’s Ingenuity Mars Helicopter completed its third test flight yesterday. It flew faster and farther than any tests that even took place here on Earth.

The helicopter took off at 4:31 a.m. EDT, or 12:33 p.m. local Mars time, rising 16 feet (5 meters) into the air – the same altitude as its second flight. But then it performed some new maneuvers. Ingenuity zipped downrange 164 feet (50 meters), which is just more than half the length of a football field, and reached a top speed of 6.6 feet per second (2 meters per second). This third flight lasted 80 seconds, while the first two flights were 39.1 and 51.9 seconds, respectively. You can watch the flight in the video above.

“[The third] flight was what we planned for, and yet it was nothing short of amazing,” said Dave Lavery, the project’s program executive for Ingenuity Mars Helicopter at NASA Headquarters in Washington. “With this flight, we are demonstrating critical capabilities that will enable the addition of an aerial dimension to future Mars missions.”

The Mastcam-Z imager aboard NASA’s Perseverance Mars rover, which is parked at “Van Zyl Overlook” and serving as a communications base station, captured video of Ingenuity. In the days ahead, segments of that video will be sent back to Earth showing most of the helicopter’s flight.

The Ingenuity team has been pushing the helicopter’s limits by adding instructions to capture more photos of its own – including from the color camera, which captured its first images on Flight Two. As with everything else about these flights, the additional steps are meant to provide insights that could be used by future aerial missions.

Ingenuity Helicopter third flight

NASA’s Ingenuity Mars Helicopter can be seen hovering during its third flight on April 25, as seen by the left Navigation Camera aboard NASA’s Perseverance Mars rover. | Photo Credit: NASA/JPL-Caltech

Ingenuity’s black-and-white navigation camera, meanwhile, tracks surface features below, and this flight put the onboard processing of these images to the test. Ingenuity’s flight computer, which autonomously flies the craft based on instructions sent up hours before data is received back on Earth, utilizes the same resources as the cameras. Over greater distances, more images are taken. If Ingenuity flies too fast, the flight algorithm can’t track surface features.

“This is the first time we’ve seen the algorithm for the camera running over a long distance,” said MiMi Aung, the helicopter’s project manager at JPL. “You can’t do this inside a test chamber.”

Vacuum chambers at JPL are filled with wispy air, primarily carbon dioxide, to simulate the thin Martian atmosphere; they don’t have room for even a tiny helicopter to move more than about 1.6 feet (half a meter) in any direction. That posed a challenge: Would the camera track the ground as designed while moving at higher speed on the Red Planet?

Ingenuity Helicopter Photos

This is the second color image taken by the Ingenuity Helicopter. It was snapped on its second flight on April 22 from an altitude of about 17 feet (5.2 meters). Tracks made by NASA’s Perseverance Mars rover can be seen as well. | Photo Credit: NASA/JPL-Caltech

Lots of things have to go just right for the camera to do that, said Gerik Kubiak, a JPL software engineer. Aside from focusing on the algorithm that tracks surface features, the team needs the correct image exposures: Dust can obscure the images and interfere with camera performance. And the software must perform consistently.

“When you’re in the test chamber, you have an emergency land button right there and all these safety features,” Kubiak said. “We have done all we can to prepare Ingenuity to fly free without these features.”

With this third flight in the history books, the Ingenuity Mars Helicopter team is looking ahead to planning its fourth flight in a few days’ time.

Editor’s Note: Follow along The Robot Report’s complete coverage of the Mars 2020 Mission.

 

About The Author

Steve Crowe

Steve Crowe is Editorial Director, Robotics, WTWH Media, and co-chair of the Robotics Summit & Expo. He joined WTWH Media in January 2018 after spending four-plus years as Managing Editor of Robotics Trends Media. He can be reached at [email protected]

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