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Things to know about the NASA Mars Helicopter




When the NASA Perseverance rover lands on Mars on Feb. 18, 2021, it will be carrying a small but mighty passenger: Ingenuity, the Mars Helicopter.


The helicopter, which weighs about 4 pounds (1.8 kilograms) on Earth and has a fuselage about the size of a tissue box, started out six years ago as an implausible prospect.


Engineers at NASA’s Jet Propulsion Laboratory in Southern California knew it was theoretically possible to fly in Mars’ thin atmosphere; but no one was sure whether they could build a vehicle powerful enough to fly, communicate, and survive autonomously with the extreme restrictions on its mass.


Then the team had to prove in Earthbound tests that it could fly in a Mars-like environment. Now that they’ve checked off those objectives; the team is preparing to test Ingenuity in the actual environment of Mars.


“Our Mars Helicopter team has been doing things that have never been done before – that no one at the outset could be sure could even be done;” said MiMi Aung, the Ingenuity project manager at JPL “We faced many challenges along the way that could have stopped us in our tracks. We are thrilled that we are now so close to demonstrating – on Mars – what Ingenuity can really do.”



Ingenuity Mars Helicopter on the Martian Surface



Ingenuity survived the intense vibrations of launch on July 30, 2020; and has passed its health checks; as it waits to plunge with Perseverance through the Martian atmosphere. But the helicopter won’t attempt its first flight for more than a month after landing: Engineers for the rover; and helicopter need time to make sure both robots are ready.


Here are the key things to know about Ingenuity as the anticipation builds:



1. Ingenuity is an experimental flight test.

The Mars Helicopter is what is known as a technology demonstration – a narrowly focused project that seeks to test a new capability for the first time.


Previous groundbreaking technology demonstrations include the first Mars rover, Sojourner; and the Mars Cube One (MarCO) CubeSats that flew by Mars.


The helicopter doesn’t carry science instruments and isn’t part of Perseverance’s science mission.

Ingenuity’s objective is an engineering one: to demonstrate rotorcraft flight in Mars’ the extremely thin atmosphere; which has just around 1% of the density of our atmosphere on Earth.


Ingenuity will attempt up to five test flights within a 30-Martian-day (31-Earth-day) demonstration window.


Its pioneering aspirations are similar to those of the Wright brothers’ Flyer; which achieved the first powered, controlled flight on Earth.







2. Mars won’t make it easy for Ingenuity to attempt the first powered, controlled flight on another planet.

Because the Mars atmosphere is so thin, Ingenuity is designed to be light, with rotor blades that are much larger; and spin much faster than what would be required for a helicopter of Ingenuity’s mass on Earth.


The Red Planet also has beyond bone-chilling temperatures, with nights as cold as minus 130 degrees Fahrenheit (minus 90 degrees Celsius) at Jezero Crater; the rover and helicopter’s landing site.


These temperatures will push the original design limits of the off-the-shelf parts used in Ingenuity.


Tests on Earth at the predicted temperatures indicate Ingenuity’s parts should work as designed; but the team is looking forward to the real test on Mars.


“Mars isn’t exactly pulling out the welcome mat,” said Tim Canham, Ingenuity’s operations lead at JPL.


“One of the first things Ingenuity has to do when it gets to Mars is just survive its first night.”



3. Ingenuity relies on the Mars 2020 Perseverance mission for safe passage to Mars and for operations on the Red Planet’s surface.

Ingenuity is nestled sideways under the belly of the Perseverance rover with a cover to protect it from debris kicked up during landing.


Both the rover and the helicopter are safely ensconced inside a clamshell-like spacecraft entry capsule during the 293-million-mile (471-million-kilometer) journey to Mars.


The power system on the Mars 2020 spacecraft periodically charges Ingenuity’s batteries on the way there.


To reach the Martian surface, Ingenuity rides along with Perseverance as it lands.


The rover’s entry, descent, and landing system features a supersonic parachute, new “brains” for avoiding hazards autonomously; and components for the sky crane maneuver, which lowers the rover onto Mars from a descent vehicle.


Only about 50% of the attempts to land on Mars, by any space agency, have been successful.


Once a suitable site to deploy the helicopter is found, the rover’s Mars Helicopter Delivery System will shed the landing cover; rotate the helicopter to a legs-down configuration, and gently drop Ingenuity on the surface in the first few months after landing.


Throughout the helicopter’s commissioning and flight test campaign, the rover will assist with the communications back-and-forth from Earth.


The rover team also plans to collect images of Ingenuity.




4. Ingenuity is smart for a small robot.

Delays are an inherent part of communicating with spacecraft across interplanetary distances; which means Ingenuity’s flight controllers at JPL won’t be able to control the helicopter with a joystick.


In fact, they won’t be able to look at engineering data or images from each flight until well after the flight takes place.


So Ingenuity will make some of its own decisions based on parameters set by its engineers on Earth.


The helicopter has a kind of programmable thermostat, for instance, that will keep it warm on Mars.


During flight, Ingenuity will analyze sensor data and images of the terrain to ensure it stays on the flight path designed by project engineers.


5. The Ingenuity team counts success one step at a time.

Given Ingenuity’s experimental nature, the team has a long list of milestones the helicopter must reach before it can take off and land in the spring of 2021.

The team will celebrate each milestone:


  • Surviving the cruise to Mars and landing on the Red Planet
  • Safely deploying to the surface from Perseverance’s belly
  • Autonomously keeping warm through the intensely cold Martian nights
  • Autonomously charging itself with the solar panel atop its rotors
  • Successfully communicating to and from the helicopter via a subsystem known as the Mars Helicopter Base Station on the rover

If the first experimental flight test on another planet succeeds, the Ingenuity team will attempt more test flights.





6. If Ingenuity succeeds, future Mars exploration could include an ambitious aerial dimension.

Ingenuity is intended to demonstrate technologies and first-of-its-kind operations needed for flying in the Martian atmosphere.

If successful, these technologies and the experience with flying a helicopter on another planet could enable other advanced robotic flying vehicles that might be part of future robotic and human missions to Mars.

Possible uses of a future helicopter on Mars include offering a unique viewpoint not provided by current orbiters high overhead; or by rovers and landers on the ground; high-definition images and reconnaissance for robots or humans; and access to terrain that is difficult for rovers to reach.


A future helicopter could even help carry light but vital payloads from one site to another.

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