NASA’s Mars mission chases Wright Brothers moment

NASA's 1.8kg helicopter Ingenuity will attempt to hover over the surface of Mars before landing.

NASA's 1.8kg helicopter Ingenuity will attempt to hover over the surface of Mars before landing. Photo: EPA/NASA

NASA hopes to score a 21st-century Wright Brothers moment as it attempts to send a miniature helicopter buzzing over the surface of Mars in what would be the first powered, controlled flight of an aircraft on another planet.

Landmark achievements in science and technology can seem humble by conventional measurements.

The Wright Brothers’ world-first controlled flight of a motor-driven aircraft – near Kitty Hawk in North Carolina, USA, in December 1903 – covered just 37 metres in 12 seconds.

A modest debut is likewise in store for NASA’s twin-rotor, solar-powered helicopter Ingenuity.

If all goes to plan, the 1.8-kilogram chopper will slowly ascend to three metres above the Martian surface, hover in place for 30 seconds, then rotate before descending to a gentle landing on all four legs.

While the mere metrics may seem less than ambitious, the ‘airport’ for the interplanetary test flight is 278 million kilometres from Earth, on the floor of a vast Martian basin called Jezero Crater.

Success hinges on Ingenuity executing the flight instructions using an autonomous pilot and navigation system.

“The moment our team has been waiting for is almost here,” Ingenuity project manager MiMi Aung said at a recent briefing at NASA’s Jet Propulsion Laboratory (JPL) near Los Angeles.

NASA is likening the experiment to the Wright Brothers’ feat more than 117 years ago, paying tribute to that modest but monumental first flight by affixing a tiny swathe of wing fabric from the original Wright flyer under Ingenuity’s solar panel.

The robot rotorcraft was carried to the red planet strapped to the belly of NASA’s Mars rover Perseverance, a mobile astrobiology lab that touched down on February 18 in Jezero Crater after a nearly seven-month journey through space.

If the test succeeds, Ingenuity will undertake several additional, lengthier flights in the weeks ahead, though it will need to rest four to five days in between each to recharge its batteries.

Prospects for future flights rest largely on a safe, four-point touchdown the first time.

“It doesn’t have a self-righting system, so if we do have a bad landing, that will be the end of the mission,” Aung said.

While Mars possesses much less gravity to overcome than Earth, its atmosphere is just 1 per cent as dense, presenting a special challenge for aerodynamic lift.

To compensate, engineers equipped Ingenuity with rotor blades that are larger and spin more rapidly than would be needed on Earth for an aircraft of its size.

The design was successfully tested in vacuum chambers built at JPL to simulate Martian conditions, but it remains to be seen whether Ingenuity will fly on the red planet.

The small, lightweight aircraft already passed an early crucial test by demonstrating it could withstand punishing cold, with nighttime temperatures dropping as low as -90C, using solar power alone to recharge and keep internal components properly heated.


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