Welcome to NASA's Science Live.
This is your chance to interact with NASA experts
and have your questions answered in real time.
I'm your host, Raquel Villanueva.
Earth had the Wright brothers.
Mars had ingenuity.
Today, we're going to talk about the Mars helicopter.
It's been almost three years since ingenuity made history, proving
control and powered flight is possible on other worlds.
Ingenuity was designed for up to five test flights over 30 days, but it went
well beyond those expectations since the helicopter completed 72 flights.
But on that last flight two weeks ago,
the rotor blades were damaged and the mission came to a close.
Well, it may be the end of the era.
Ingenuity's legacy will last for many years to come.
If you have any questions throughout the show,
you can send them in using the hashtag.
Ask NASA on social media or drop them into the comment box.
We'll get to our team of experts in just a moment.
But first, a little more back story.
You might remember ingenuity hitched a ride with the Perseverance rover,
and it's been pushing the boundaries of what is possible ever since
it got dropped off on the Martian surface.
The £4 helicopter was a technology demonstration, proof
that it was possible to fly in the thin atmosphere of Mars.
Ingenuity spent nearly 128 minutes flying,
covered over 11 miles and reaching altitudes as high as 79 feet.
Each flight brought new insights to the team
as they continue to challenge it to do more.
We caught up with chief engineer Travis Brown
for a breakdown of some recent milestones.
The Ingenuity Mars helicopter was designed to push the limits.
And I'm going to show you how we've taken it to the extreme.
Today, we're here in the Aerial vehicles lab at NASA's Jet
Propulsion Laboratory, where we developed prototype helicopters.
Ingenuity started off as a tech demo
to push the aeronautical boundaries over the course of five flights.
Then we transitioned into an operational demo phase
where we partnered with the Perseverance Rover to do science and scouting.
But about a year ago, when the Perseverance Rover
started racing up the Jezero Crater Delta, we actually found that
we had to work pretty hard to stay ahead of the rover.
We decided it was time to shift gears again,
once again, pushing the boundaries of Martian flight.
This campaign really began in earnest with Flight 49,
where we simultaneously set new speed and altitude records
by Flight 62.
We had nearly doubled our max speed and doubled our max altitude.
We also tested different landing
speeds faster to save energy and slower to reduce landing loads.
Both of these strategies may be used on future helicopters.
We performed a type of flight testing called System identification.
This is a crucial but risky procedure that helps us understand
the vehicle's performance by how it responds.
Our team also devised new ways to target the high resolution camera,
which allows us to provide advanced reconnaissance imaging for the rover.
And we were able to take stunning shots like this.
One of them of a crater from Flight 51.
In addition, Ingenuity conducted several
first of their kind experiments on Martian wind and dust movement,
which gave us new insight into the Martian atmosphere.
What we've learned will help us design the next generation of Martian rotorcraft.
We're testing more efficient blades.
We're also working on a mars science helicopter concept
that could potentially transport
heavier payloads and take us to more exciting locations on Mars.
When people look back at ingenuity, I really hope that they see
how much this one small helicopter has done to elevate
the limits of human achievement.
Thank you, Travis.
Let's meet our other experts.
But first, a reminder that you can have your questions answered
live during today's show.
Submit them using the hashtag, Ask NASA
on social media or drop them into the comment box.
Today, I am joined by TED, Senators
Ingenuity, helicopter project manager and Tiffany
Morgan, Mars Exploration Program Deputy director.
Thank you both so much for being here.
Thank you so much for being here.
Thank you, Rick. Okay. So ten.
Thank you, Teddy.
So I have a question for you.
I understand that even though flight operations are over,
the helicopter remains upright and you are able to communicate with it.
What has your team learned in the past few days?
An incredible amount.
Yes, we do know that we've reached the end of our flight operations.
But miraculously, this little aircraft is tougher
still than we could have ever imagined.
We do believe that with Flight 72, we had a strike with the surface of Mars.
And we have images showing damage to our rotor blades,
but our baby still upright.
She's power positive.
We're getting energy on the solar panel.
And in the last couple of days and in the days ahead of us here,
the team will be executing some additional sequences
to try and piece together the pieces and then really understand
what might the moments of of that impact look like.
And also what is the state of the rotor system.
Obviously, from the images being shown, it's pretty clear
cut that the carbon fiber thin blades have been damaged.
But the team is going to do a series of investigations where we're going to try
and wiggle the blades, spin them slowly while we record some video footage
and try and get as much as we can and learn even more
than we already have with ingenuity in the days and weeks ahead of us here.
Now, Terry, can I follow up on that?
Like what will happen over the next few days and weeks with ingenuity?
And can you go into how it will involve perseverance?
Absolutely.
So currently, perseverance
is to the southeast of ingenuity, and it's on its journey west.
And in the days and weeks, depending on the rover, planners and science
priorities, perseverance will get within line of sight of ingenuity.
But several hundred meters away, while that's happening,
the Ingenuity team,
we've already uplinked our first activity where we will be wiggling the blades.
When we say wiggle the technical term, that means we're going to change
the angle of attack of the blades, but without rotate
and the team is going to record a video while we do that.
That'll be our first step.
Second step, once we've established that our servo system is still healthy,
we will do a simple push of the blades where we will try and rotate them.
180 degrees very slowly and again, try and record a video of that.
And that will show us the other side of the rotor system.
We suspect,
based off of the images we've seen so far, that all four rotor blades are damaged.
But until we rotate and get images on the other side, we're not certain.
And there's
additional steps that the team is still considering right now
and weighing the pros and cons of once we do that, should we try and do
a low speed spin and try and characterize how well did the rotor motor hold up?
But it is certain that once we're done with all of the investigation
process, we've reached the end of our flight operations.
She won't be able to fly again.
Helicopters like this are not designed to fly
even with the smallest fraction of a gram of the balance.
And and we're going to have
the end of our mission in the in the weeks ahead here.
Looking forward to the updates.
And as Teddy pointed out, we still have so much to learn
from ingenuity, which brings us to the future.
Tiffany, what has ingenuity talks about what is possible on other planets?
Well, as you've already
heard, ingenuity was a technology demonstration.
Technology just demonstration is an effort that allows us
to take more risks so that we can understand the capability.
It's not required for the primary mission.
Perseverance can succeed without ingenuity,
but ingenuity so far exceeded our expectations.
It was so valuable not to just demonstrating
the technology, but to feeding forward for future missions.
It has provided us real data that we can use to improve upon
the current current designs and future designs for exploring other planets.
Not only did it help us with designing for future missions,
but it's also how it also helped with Perseverance's current mission.
It scouted ahead and took a sneak peek at the operations
that perseverance is going to experience, and it allowed the planners to
navigate the terrain as well as to identify
potentially compelling science targets.
It's the team that the NASA's
JPL team didn't just demonstrate the technology.
They demonstrated an approach to the technology demonstration
that if we use in the future will really help us to explore
other planets and be as inspiring
is amazing as ingenuity has been.
Speaking of inspiring Tiffany, how would you describe the legacy
of the Mars helicopter?
Well, you know,
it was the very first powered
aircraft on a powered and controlled aircraft on another planet.
It will always hold that title as the very first.
And it achieved so many feats in the Mars thin atmosphere.
But I really don't think that the legacy for ingenuity has been defined yet.
I think it's to be continued.
If you take our first roving rover, Sojourner and everything that came
after Sojourner, we had Spirit, we had opportunity, curiosity, perseverance
taught us so much and really changed the way that we explore Mars.
I think that ingenuity will continue to amaze those
in what it can feed forward and what its legacy will be in the future.
It's just been wonderful and I think it's going to teach us for years to come.
Absolutely.
And Teddy, we know the legacy of ingenuity is important to you, too.
What would you like to say to your team who made this all possible?
Yeah, now that we've had a couple of days to, you know, process
and everyone should keep in mind, right when we signed up
for the technology demonstration, it was a 30 Sol mission.
A Sol is a day on Mars.
So we are a small team for ingenuity.
It's it's members here at NASA's JPL,
Ames Research Center, Langley, AeroVironment and a handful of other
organizations that have their heart and soul into this little spacecraft
and this little aircraft for about a decade now.
And seeing it go through its marvelous journey
from a successful tech demo to checking the box on Flight one.
Our job was done and really pushing the envelope
across all the different axes of exploration here in the last
two and a half years of extended mission operations.
It's been the mission of a lifetime for all of us.
And I wanted to say thank you to all of the people here that
gave their weekends, their late nights,
all the engineers, the the the aerodynamics scientists,
the technicians who hand crafted this aircraft is a hand-built spacecraft.
Right.
Every single solder joint is a testament really to two already.
And the dedication of all the people that that made ingenuity possible.
I want to say thank you to the team and for everyone listening here.
We couldn't be prouder
or happier with how our little babies done.
So thank you all.
And thank you, Teddy and Tiffany.
Remember, we have lots of questions coming in from viewers watching online.
You can submit them using the hashtag ask NASA
or by posting them in the comments wherever you're watching today.
Our first question is from T on App X,
who asks How was ingenuity able to outlast everyone's expectations?
Great build quality luck, or all of the above?
Teddy, I'll let you have a go at that one.
All the above.
There's a there's the first part of it, which is a robust design, right?
B, the coaxial aircraft design has been proven.
Now we've now it was a theory that it would last
and it would do well at Mars. And now it's a fact.
So the engineers did a fantastic job proving out that the design is robust.
I mentioned a second ago the technicians.
That is a huge part of it.
I would say the technicians,
when you when you think of how did we survive this long?
If you take a spoon at home and bend a spoon back and forth
five, ten, 15 times, eventually the spoon will snap
all of the hundreds up to close to a thousand
hands under joints and ingenuity every single night on Mars.
They do this right and their cell phone parts we're talking about.
Right.
So the fact that Ingenuity's lasted that long with cell phone
commercial off the shelf parts is the technicians.
And then let's let's not get too excited.
Right. There's also a good amount of luck. Right.
And we should be thankful for a fair amount of luck we've had in the mission.
But I don't want to discredit the team.
We have had an effort on the engineering side
and on the technician side to try and make the absolute best spacecraft we could
for this technology demonstration.
And today we have another question for you.
Pavel on asks asks.
Rotor damage looks fairly small.
Can it not take off because of the thinness of the atmosphere
with this damage, or is there no point in even trying?
Yeah. So two parts.
There's two aspects to that.
One is just rotational dynamics, the way a coaxial helicopter
and every helicopter, even helicopters here on earth, the way that they work
is that you spin your rotor system very, very quickly.
And as you do that, you push air down.
Anyone who's ever spun a top right
will know that if it's not well balanced, it wobbles, right?
So these rotor blades are perfectly balanced to the fraction of a gram.
And if you offset that balance, you're going to induce
a lot of vibrations, which will cause a lot of bad things to happen.
The second part of that is I actually have one of our new prototype blades here.
What's important to note is that as the rotor blade rotates
through the air, the outer part is the is the fastest moving part of it.
And the inner part is slower.
The fastest moving part is where you generate most of the lift.
And if you look at the shadow, the image of the shadow,
we think about the last the furthest out, 25% of the rotor blade itself is missing.
So we have lost, you know,
the most important from a living control perspective, a part of our rotor blade.
Even if we were somehow perfectly balanced,
our thrust capacity has been significantly degraded
and Basal on X wants to know.
Our fourth grade class at 174 in Queens has questions.
Hello.
How did you get the idea to build ingenuity?
And how long did it take to build?
Teddy, we'll start with you on that.
And then Tiffany, if you also want to chime in as well.
Sure.
So our chief engineer, Bob Barron, back in the nineties first
started thinking about the physics and just on the back of a napkin
taking the aerodynamics models and the physics
that we know here on Earth and trying to apply it to Mars.
The big change, the whole reason why this is hard
is because Mars atmosphere is very, very thin.
It's about 1% the density of Earth's atmosphere.
So so Bob started
looking at that back in the nineties and then put it on a shelf and then
around 2012, 2013, 2014,
this new Mars 2020 mission was coming up and there was a discussion
of between Bob and Charles Velocity and a handful of other individuals.
Hey, you know Bob's idea, could we pull that off now?
Right. And it was a confluence.
It was a coming together of a lot of technologies.
I mentioned earlier the cell phone industry you could not
build in the nineties because cell phones didn't exist.
Right.
The chips inside the miniaturization, lithium battery technology didn't exist.
So it was really the perfect timing of a mission opportunity.
Going to Mars with perseverance and Mars 2020.
A team of excited engineers here at JPL and our partners
and the advancements of
and low cost advancements of commercial parts like cell phone chips,
cameras, accelerometers, gyroscopes and lithium battery technology
that coalesced together to really give you the opportunity
to try and pull this off. yeah.
To me.
Do you have any? Well, that.
Sure.
Well I can say you know, now is a is an organization that fosters
innovation and diversity and enables teams
like JPL's Ingenuity team to come up with ideas like this.
So I can't tell you what it was like to think of this idea for the first time.
But I can tell you all of the things or many things that we've been thinking
of doing with the capability now that it's been proven, you know,
what are the places on Mars that we we can't access right now with the rovers?
What would the helicopters enable us to do?
Could we, at a low cost, deploy small sensors and collect more,
more science data?
So what they've done in terms
of proving the technology has enabled us to
think about how the capability can be used in the future.
And, you know,
we have a few more questions coming in from this fourth grade class.
Tiffany, will ingenuity come back to Earth?
And how do you feel when it surpassed your predictions about its flights?
wouldn't that be awesome?
If ingenuity came back to Earth, NASA's plans to send humans to tomorrow.
So maybe our astronauts will bring ingenuity back someday.
It is a lot of payload to bring back, but it could
it could potentially provide us a lot of information for future missions.
And I'm sorry, could you repeat the second question?
How did you feel when it surpassed your predictions about its flights?
You know,
ingenuity, the personality of ingenuity,
I think, is made up of all of the personalities
that have been on the team as well as the personality
that the public puts on to ingenuity.
So if the personality gets bigger and bigger and bigger with every flight,
and you get more and more attached, but at the same time, it's
I feel like even with its final flight,
it is still amazed us that we can still communicate with it.
We're still learning from it.
It's it's sad to see sad to see Janine
not be with us anymore on a regular basis with perseverance,
but just such an amazing technology demonstration and machine.
And it's to celebrate
everything that the
team and ingenuity have accomplished.
If I could add, on top of that, there was a there was a
an acronym, a phrase that we use during development with ingenuity.
There are two.
But but the one I think is more appropriate
here is Wendy, which stood for we're not dead yet.
And there were a lot of opportunities during development of ingenuity
before launch engineering
model down to flight model delivery to delivery to the Kennedy Space Center.
And there were always these curveballs that would get thrown to the team.
And we'd say, Wendy, we're not dead yet. We're not dead yet.
And it's funny now and ingenuity going get the last laugh
because she's still not dead yet. Right?
I reached the end of our flight mission.
She's not going to fly again.
And we've we've within the team.
This is not a scientific designation, but within the team.
We've coined the area where her last airfield, Valley North Hills.
Right.
Is You can look it up the entomology of the word, but you know,
the undying lands in that she still refuses to quit.
And we couldn't be a more surprised
but be more proud of of what she's been able to accomplish
the little helicopter that could.
And thank you for teaching us about that acronym.
Now we have that to use in our back pockets.
We have Ronan Glover on LinkedIn who asks,
What have been the most significant learnings in regards to the controller
ability of helicopter in Mars atmosphere?
That was a mouthful for Rita.
Did you want to grab that one?
Yeah, there is a tome of information
that we've collected here with every single flight.
I've talked to it
in the past as kind of this treasure trove is the other descriptor I use.
Every flight that ingenuity has flown.
She's packaged a whole collection of data from our IMU, from accelerometers,
gyroscopes, our power system, and we send it back down to earth.
And our teams compare the prior estimate and the prior
prediction of how ingenuity would perform in the simulation.
We have a 3D simulation environment here on Earth
versus how well she actually did on Mars.
And we've learned an incredible amount.
The first and the most exciting part is that all of the aerodynamic models
that were developed at NASA's Ames Research Center, Langley
and here at JPL, those were theories before launch.
We now have ground truth, right.
And we can hand this off to the next generation and say
this is actually how a helicopter performs at Mars. Right.
We thought it was we thought the curve was going to look like this.
And it actually looks like this. Right.
And the difference, that's the good stuff that that those are the lessons learned
and the calibrations and the turning of the knobs
that allows for your next aircraft, whether it be a helicopter or an aircraft,
you name it, can now take advantage of that difference.
And that lesson learned there is we don't have time here for it
for, you know, during NASA's Science Live.
But there are interesting aerodynamics that are different between Earth and Mars.
There's a lot of publications I encourage you all to to research
the ingenuity, publications that delve into that.
If you're interested of why the physics and the engineering of
and the controllability specifically of flying in such a
thin atmosphere is so much harder than Earth.
And a question for both of you coming up.
Space Peacock on X wants to know what is the Mars
helicopter team's favorite memory from Ingenuity's journey today?
I'll start with you.
I can't speak for the whole team because we haven't done a survey
of the entire team's favorite, you know, most Democratic vote here.
I will say the most.
I think it's safe to say
that the most important one for everyone is Flight one.
And seeing the images from Ingenuity's perspective of Flight one happening.
And you can see us in the video here celebrating
and what you see here is the altimeter plot.
This was the helicopter's own telemetry confirming for us that, yes,
the altimeter says that we raised up to a handful of meters and came back down.
And then shortly thereafter, we got the images
from the helicopter itself and a video from perseverance
really sealing the deal for us that, yes, everything worked perfectly.
I think that was the most important part.
If you ask every other team member, they'll all have their own
favorite stories. But I think
without hesitation, the most significant was flight number one.
And I think it's hard.
What would be your one? go ahead.
I think it's hard to top flight one.
I can say another memorable moment, though, would would be
when we realized ingenuity was contributing to the perseverance
mission, when it when it found a potential target or helped
the scientists identify a potentially scientifically compelling target.
I think that that was pretty impressive.
There was also the when it imaged some of the
the entry descent landing gear was pretty
it was pretty exciting
and hitchhike on Mars on X wants to know
can perseverance survive without ingenuity
Can you do one take that
Yeah absolutely.
Ingenuity was a tech demo.
Whether or not ingenuity was on the rocket or not had no impact
to perseverance.
Its core science objectives and its mission objectives
have nothing to do with the Ingenuity Project,
and it has an important job to do, which is to collect samples
so that we can bring them back to Earth and try and answer some pretty
big questions about the unique uniqueness of life in the solar system.
So absolutely perseverance going to keep on doing its thing
with or without a helicopter has no impact.
And Chris on X wants to know,
is it possible for perseverance to reach ingenuity to get more photos?
And we have a similar question from Benjamin on YouTube who asks,
Will the rover go over to ingenuity and check the conditions, Study both
questions for, you know, unfortunately, it's not going to it's not in the plans.
As you can imagine, there's a team of eager
rover planners who jumped on that very quickly, that question.
As soon as we realized we weren't going to fly again, of trying to understand,
is it physically possible, is it traversable, what are the risks?
What are the hazards?
One of the reasons we flew to
this area is because there are there are large sand ripples.
And in between the sand ripples, there's nice soft sand.
It's good for landing, bad for future tracking.
As as we've learned in the last three flights,
that's not a good area
for big heavy rovers to be driving in.
You can think of it as a sand trap, for example.
Right.
So if you have a pickup truck,
you don't want to be driving a pickup truck into a sand trap area
and and, you know, put the rover at risk for the sake
of imaging the helicopter, the team will do their best
to along their strategic route here to point there.
There's high resolution camera at ingenuity and get the best images
possible as close as they can, all schedule permitting, of course,
But no, it is not possible for perseverance to drive in
without putting the rover at significant risk.
Thanks, Teddy.
And we have lots of questions coming in.
But just a reminder that if you have a question,
use the hashtag, ask NASA or leave them in the comment box.
Tiffany, question for you.
Ed Woody on LinkedIn asks, I know
you must be overjoyed with the longevity of ingenuity.
What are some of the most important things you feel can be taken away from this
and apply to future flights on another planet like Mars?
Well, some of the most important things,
you know, we talk a lot about systems science on Mars and to be able to
potentially deploy sensors in the future or to pick up samples
and to carry cameras to areas that we can't
get to with the rover right now.
So, you know, novel Mobility Solutions would be great to see inside of a volcano
or Valles Marineris.
And there's just some really excite places that we would like
to see on Mars that I could see us using future helicopters for.
And they'll be more capable than ingenuity, because ingenuity
is has helped us learn so much about what can be accomplished.
So I really look forward to the future and what we can do
with with the offspring of ingenuity.
Thanks.
And then, Teddy, one for you.
Someone on Twitter wants to know, could future missions
include helicopters with spare parts so they could fix themselves?
Interesting question.
So from physics, first principles.
Yes.
In fact, our our partners
who built a lot of the aircraft components that you can see when you look
from the outside of ingenuity, AeroVironment, they
that was an initial trade going back years of making the blades removable or not.
And in future concept designs we have for next generation helicopters,
that's also an option where you can remove a blade and swap a blade.
So it is feasible to imagine a scenario in the future, right,
where you could have a helicopter that could swap a leg swap rotor blades.
It's a fun robotics challenge to to to create an arm that can do that.
Or of course, you can also have human astronauts
do it right, just like humans fly drones here on Earth.
And, you know, you break a propeller and you swap the propeller out.
I'm confident in the future we will have fleets of aircraft
flying around at Mars and human pilots either, you know, right in front
or remotely operating them.
But, yes, in short, you can imagine a situation
where you can make the parts interchangeable.
And then follow
question for Tiffany, the username, somebody that you used to know.
Maybe it's true for this woman on YouTube asked,
Is there any way you could send helicopters like that
to other planets?
Well, I don't want to see helicopters like that,
but flying objects or aerial vehicles, controlled powered aerial vehicles.
We do have the Dragonfly mission going to explore
the Titan moon of Saturn.
And it is not quite the same is as ingenuity.
It is powered by a radioisotope
thermal generator, and it's the size of a small car.
It is also the primary mission.
So this is not a technology demonstration,
but Dragonfly is in development now
and really looking forward to see what it achieves in the future.
And Jim
on Facebook wants to know what caused the damage to the blades.
Teddy Sure.
So we
our theory here is that it was ground contact, right?
I say theory just to, you know, explain.
We don't have video footage of what occurred.
And we also don't know the exact chronology of how it unfolded
because we lost that crucial bit of data right around the rough landing.
I say rough landing because we're still on all four feet as opposed to a crash.
Right.
But what we can say for certain is that at some point
we had contact with our rotor blades with the surface.
And another thing that we can say for certain is that we browned out
around that.
What we don't know is did one of the other or the other way around.
We don't know if we had ground contact which caused the brownout
or there was a brownout for another reason, which then caused
the helicopter to have contact with the ground.
We will never know the answer to that question again.
The team has been trying to collect
as much data as we can, but we are certain that those last few seconds
of landing when we were about a meter off the ground from Flight 72,
that data is unrecoverable because of the brown on the power side,
but we believe was ground contact with the rotor system.
We have photo evidence for two of the four blades are damaged
and the days ahead, we're going to try and collect additional photo evidence for
the remaining two. But
until you actually have like a sample blade,
is there any way you can kind of show us where the damage? Yes.
Right.
So here is a prototype.
The next generation blade, But it looks
for the most part the same as Ingenuity's rotor blades.
Two things to keep in mind here.
This is incredibly light.
It's about 30 grams. Okay?
Almost nothing.
The center of it, it's it's filled with foam.
I don't know if it's easy to see there.
And I'll show you just the cross-section of incredibly
how thin this rotor blade actually is.
Almost paper thin carbon fiber on the top of carbon fiber on the bottom,
and then foam in the center.
So if you can see the entire length of the blade here, this is a little bit
longer than ingenuity's.
But we believe right around here, too, the tip has been broken off.
And I mentioned earlier
that's where most of the lift is, is kind of your last third,
because that's the fastest moving part as it rotates in a circle.
Thank you, Terry.
And then we have a viewer on Facebook who wants to know,
hello, is there water on Mars?
Tiffany? Want to take that one?
Absolutely.
You know, we we've known for about 20 years
or we've suspected for about 20 years that there was water on Mars.
Spirit and Opportunity helped prove that to us.
Curiosity has been exploring Gale Crater,
which used to be a river, and then Jezero Crater.
It was a delta.
So absolutely.
And we believe we have well, we know we have ice at the poles
and we believe we have ice closer to the equator is underground.
So absolutely, there used to be water on Mars in three
and a half, 4 billion years ago.
It didn't had an atmosphere were similar to the way Earth is today.
Thank you.
And Karen on YouTube asks, Was ingenuity
operated in real time or were they program for autonomous operations
and how was that data relayed in that instant?
Question for you, Daddy?
not real time.
we do what's called sequencing when we operate with Mars,
and the main reason for that is the speed of light.
So Mars and Earth are so far apart that to send a signal
from one to the other,
depending on where the two planets
are in their orbit around the sun can take about 15 minutes and
that's okay for some applications when you're trying to control
one of the orbiters around Mars, for example,
or trying to communicate with the rover, that's okay.
But for a helicopter, your control loops are so blazingly fast.
Your blades are spinning at 350 miles an hour and you're only in the sky
for about 90 seconds.
So there's no time for you to joystick.
So instead, what the team does is
we prepare a list of instructions which we call a sequence.
And our controllers here at JPL, we send that up through the Deep Space
Network, a collection of satellite dishes
that send the information over to Mars.
We have the Mars relay network, a collection of orbiters around Mars
that get that data,
send it to the Perseverance Rover, and then finally over to the helicopter.
We have a base station box on the rover.
That's our man in the middle. If You will.
So once our
script, our sequence makes that long chain all the way to the helicopter,
we're hands off.
And then we trust the baby to do the right thing.
And we go to sleep here on Earth, and we wake up and hope to hear good news.
And it's worked miraculously well.
That concept of operations for the last two and a half years.
And speaking of ingenuity and variance relayed with each other,
Benjamin on YouTube wants to know how many souls until perseverance
is out of range of ingenuity for good.
We don't know the answer to that.
It is strongly dependent on the answer that I strongly dependent
on the rover planners and scientists priorities In the weeks ahead.
Their mission is to drive west and to go collect
more of those precious samples we mentioned earlier.
And if they find areas on the way that they want to sample on or
if they find difficult to traverse terrain,
that may add a handful of days here or there.
In terms of communication, we believe that we have
about a kilometer of telecom range, at least a kilometer.
If we have good line of sight with the rover
and our team has already done the analysis to understand
where are the hills, where the ridgelines and, you know,
kind of shading a map to really understand.
At what point do we think that'll be out of comms?
I would say in the weeks ahead, a handful of weeks ahead here.
We think we should still have good communications with ingenuity.
But will we will know more as as the days unfold here.
Thank you.
And another question for you.
A viewer on X wants to know, did ingenuity possibly suffer
some damage during Flight 71 when it made an emergency landing?
Great question.
So theoretically, it's possible Flight
71 had an emergency landing and it was it was one of our rougher landings.
When you stack them up against the the all the other flight that we've had,
our horizontal velocity when when ingenuity
like I'll just use my hand here the analogy
when we touch down with ingenuity, we like to just touch down at
about a meter per second.
We also tried testing slower, around a half meter per second,
very gentle vertical, almost no horizontal velocity.
Right.
You don't want coming in on the side at an angle.
With Flight 71, we had an emergency landing
because of the blandness of the terrain underneath us
and there was a position and velocity tracking error as a result of that.
So we actually did have some horizontal landing velocity
coming down on the ground on the order of a couple of meters per second.
Now, the reason we thought we were so flight worthy,
though, is after Flight 72, we did our typical baby stepping method
to assess the health of the helicopter where we did a 50 RPM spin.
We did a high speed spin and we confirmed that our iyamu didn't
show any additional resonances.
No aggressive shaking in our imagery look good.
So a on our nominal checklist was green across the board.
So we think we just had a rough landing and she handled it
just fine and we were ready to go for four Flight 72.
And I should also add all of our flight telemetry
through the majority of Flight 72 also looked normal.
It was a good takeoff. It was a good hold.
It was a simple pop up rate was really coming down on landing,
where the feature tracking really became a challenge for us.
So it's not ruled out.
But all evidence seems to suggest that she was still flight worthy
and healthy after the end of Flight one.
And, you know,
we're getting questions that are coming in in real time.
And I think this refers to one of your answers on how
ingenuity, controlled things.
Andreas on Facebook asks, When you mentioned the sequence,
I'm thinking latitude and longitude, like GPS data.
How does that work on Mars?
Sure.
So we don't have a global positioning system at Mars,
and Ingenuity's navigation system is pretty simple.
You got to remember
we designed ingenuity to fly an equivalent of a parking lot on Mars, right?
Flat area with good feature terrains, but no big boulder or rocks to worry about.
If you look at the map of Jezero Crater.
Okay, you can see really where the mission started
was a very small area that perseverance and the scientists
and the Ingenuity team worked really, really carefully to try and pick out
kind of the little first yellow line segment on this animation here.
It was a beautiful, perfect area for us.
And then we really started spreading our wings and flying
further and further and further to where we are now here in the Valley
or Hills area.
That initial area, though, that first
little yellow segment was as close to a parking lot as you can get.
Now, going back to the question recall, the question specifically is
how did we design the feature tracking group
in terms of the question, again,
when you mention the sequence, I'm thinking
latitude and longitude, like GPS data, How does Mars
going back to that descriptor, the parking lot, Right.
Ingenuity, when she first started the mission, assumed
that she's at the center of your coordinate system.
So you can think of it as northeastern down.
And there's just no you have those three axes and from there
is your origin and you're just navigating from your takeoff spot.
So instead of GPS coordinates, it's just relative positions from takeoff.
So we'll have waypoints that we code up in the sequence and it says, okay,
from 000, go to waypoint A than waypoint B, then waypoint C
and then come down to land at Waypoint the and it's all referenced
off of that original origin, which is your take off location.
And we have two more questions for you, Teddie,
before we get back to Tiffany, the two questions go hand in hand.
Janine on Facebook wants to know how large is ingenuity?
And Andre wants to know how heavy is ingenuity on Mars?
Sure.
So ingenuity rotor system, the biggest part of ingenuity.
It's 1.2 meters from tip to tip.
So so from the right tip to the left tip and
in terms of weight, I guess to convert to pounds, it's about £4.
The total weight of ingenuity at 1.8 kilos.
It's so wonderful to think about like how light it is, actually.
So thank you for credibly right now to get back to incredibly light
and Tiffany, a viewer on YouTube, wants to know,
is any common mission for Artemus and Mars?
Well, we have
moon to Mars, common mission between moon.
And I think that those are to be developed, those are in the future.
I don't think that we have we have the Eclipse mission
right now, the commercial lunar payload system
or service contract that is allowing us to take payloads to the moon.
That is part of the IOM's program that crosses really between the Science
Mission Directorate and then the exploration Systems Mission Directorate.
But in terms of a common Mars
mission at this point, no, but we are planning for one in the future.
Most definitely.
I think Stephanie and Kate on YouTube wants to know what are the challenges
involved with accounting for blank surfaces for future helicopters?
Terry, I think this is a question for you.
Yeah, that's
that's a wonderful question and one that teams have been buzzing
with for the last couple of days since getting, you know, the news of Flight 72.
Right.
A lot of what we do here at JPL is lessons learned.
Right. And how do we improve? How do we how do we make things better?
Going back to the you have a parking lot in a feature rich area, right?
That's what we designed ingenuity for, right?
Was a very narrow use case.
30 sols, great. We found an area for it.
We really pushed it to the limits, not only flying for the last two
and a half years and the physics of all that,
but also in terms of the guidance, navigation and control
we not only pushed the limits and with Flight 72, we kind of
we learned the limit, right?
That's that's the limit for this set of hardware.
And to your point, this camera.
Right, our downward looking navigation camera,
the resolution of that camera defines the sort of terrain that we can fly over.
So if you have a high resolution camera, you can see the rocks,
you have a low resolution camera, you can't see the rocks out.
Well, so you can imagine a combination of how bland or featureless
your terrain is and how good your camera is that defines your capability.
So for ingenuity,
right for the beginning of the mission, we had oodles and oodles of margin.
And then towards the end, we really pushed it.
And she did a marvelous job at teaching us.
Right. Exactly what that limit is for next generations.
There's some simple answers,
which is you fly a better high resolution camera, Right?
And this camera is now almost ten years old, if not if not older than that.
So there's easy commercial available improvements that are also cheap.
So new the next generation of helicopters that go to Mars and just in general,
using commercial parts will be better high resolution.
And there are also other sensors you can add
to the aircraft to help it observe the ground underneath it.
But the easiest one is you fly better camera the next generation.
We thank you.
Teddy and Dan on YouTube wants to know, did ingenuity ever fly
during high winds or non-ideal weather?
Absolutely.
We've been grounded actually because of storms and the weather forecast on Mars.
There was a there's a weird, interesting week for us.
You know, getting the weather report.
I think we're all used to, you know,
having our flights be delayed on Earth because of weather.
But as we approached
fall in our first year of operation,
we actually had a big dust storm arrive and that grounded us.
And it also added it threw a lot of dust and sand into our mechanisms
and made a little difficult for us to figure out how to fly again.
We cleared ourselves off, created a sequence to wiggle
the blades and push all that dust out of the craters and fly again.
We tried to not fly.
If the winds that are expected, predicted are going to be,
you know, above ten meters a second, you know, significantly
above that and below that, we have a lot of experience with.
But but yes, it's happened now a couple of times where we hear
weather reported and we've stood down flight operations
and just you wait for it to blow over and then try again next week.
You think you're ready?
And Bodi on X wants to know, has ingenuity sent its last radio signal, or will
they still be able to communicate with it ingenuity?
Does not have an off button.
There's no way to stop her from waking up every single song.
The way she operates, though, is it's called Listen Before Talk,
which means that every single morning ingenuity wakes up at a pre-defined time
and listens for a command from perseverance within a 15 minute window.
And if there's a command within the 15 minute window,
she will reply, If there's not just goes back to bed and tries again next time.
That's how we designed her for robustness so that she can be fault tolerant
in the event that perseverance had something else to do during the tech demo
and that architecture means that moving forward again.
So after all, she'll keep going to sleep, waking up, listening for commands
and waking up on the following.
So if there's no hardware failures right, then she'll just keep doing that.
But in the years ahead, you know, more thermal cycling,
each one of those solder joints doing this,
it's anyone's guess as to, you know, how long she could last trying to do that.
All right.
And you know, Teddy, if you want X wants to know, I'm curious
to know how Ingenuity's flight will impact the future of Mars exploration today.
I want to start with you on this one, but then, Tiffany,
if you could chime in as well, that'd be great.
Sure.
I think, you know, engineer ingenuity already has, right?
It already has answered the question for all of us here at JPL,
within the larger NASA community or the nemesis, It's around
around the planet right now.
And that the box has been checked.
It's not a fluke.
Ingenuity did 72 times.
We know that it's possible.
And we know that it's robust.
And we know now that we're not limited to just rovers
and landers and orbiters and Mars.
This new aerial dimension has actually been unlocked right.
And now we're off
to the races to figure out what do we all as humanity want to do with that?
Right.
There's, you know, the current generation of helicopters.
We're designing for next missions to Mars.
And there's even more grandiose versions of aircraft
that we're designing Mars science helicopter that are much bigger,
the size of a pickup truck and a little bit bigger to pick up trucks.
Right.
And those platforms can bring scientists
to the wall of a cliff, for example, or fly down a lava
tube or go to sensitive areas that we would never dare send a rover
either because of physical constraints or otherwise.
So really, we've already unlocked it
and now it's for everyone to run with this capability.
And then
I'd like to add something to actually, I think that the last few questions
as well is ingenuity survived the Martian winter and again,
there were questions about the storms
and there were some special conditions that the operations team had to contend
with in terms of the battery battery power for for the Martian winter.
And maybe Teddy can talk a little bit more about that.
But also during our solar conjunction for the couple of weeks
every two years or so that we have the yeah, the sun is between
the Mars, Mars and Earth, that we can't enable communications quite so well.
So we give a whole bunch of autonomous
where the team gives autonomous commands to ingenuity,
and that might be something for the future of ingenuity.
So over this last solar conjunction, it took a picture, I think every day.
I think Ted could probably expand on a lot of that right there.
Yeah.
So the team is busy right now thinking of interesting and useful
and fun things to do with Ingenuity's wake up sequence in the days ahead.
Right?
Because eventually we covered this already.
Perseverance will leave out of comms range.
So there's a lot of potential for us to take images, for example,
and store them on board our flash file
system two to the Winter Common cert.
Right.
We designed ingenuity just to survive in the spring.
All right.
She has a solar panel on top and a battery system inside.
And that's it in terms of generation and storage.
And when you're at your energy balance and gets pushed to the limits when you get
the winter, what happens, is she will freeze.
We saw that happen in the first winter.
She made it out Right.
And she was able to survive going down to -90 degrees Celsius every single night
and back up the positive 20 degrees Celsius every single day.
And the team expects that we made it through one winter.
There's a pretty good chance, you know, hopefully.
But we won't know.
And, you know, we wish you the best of luck in terms of trying to do that.
If the rover ever comes back into this area.
Right. We can try and see if she's responsive.
But who knows that years down the road and,
you know, for the time being, all we're focused on
is trying to make sure we get as much data off
as we can in the time that we have allotted.
Tiffany, you brought up a great point about winter on Mars.
For those who are watching, can you kind of describe what that's like,
who I think
probably somebody that interfaces with operations like Ted,
you might be able to to share a little bit more about what that is actually like.
Sure.
So just like here on Earth right there, seasons of Mars
and the timeframes are different, right?
But you still have evolving seasons.
You have a summer spring, a winter and a fall.
And the big difference between what we're all used to here on
Earth is winters on Mars.
I mentioned early -90 degrees Celsius, and that's just normal, right?
The biggest change there, right, is going to be the temperatures.
There's also more dust, Right.
It's not just that your temperatures are changing just in the atmosphere.
And for a solar powered mission like ingenuity, and we've seen this
within their solar powered missions that NASA's sent to Mars,
that as you move into winter, there are more storms.
And those storms.
And when I say storms, it's really like wind storms or dust storms.
Those storms kick up more dust higher up into the atmosphere.
And the more dust there is higher into the atmosphere,
the less solar arrays make it down to the surface.
And that's why it gets really tricky for us operators to try and contend with that.
And, you know,
can you shave off a little bit of usage here and try and I think we're
all used to trying to save battery on our cell phones. Right?
And you close as many apps as you can.
Operators here in JPL trying to do the same thing.
Right.
And try and preserve as much of the of the energy you can.
But eventually you get to the point where you can't fight physics
and the energy needed to heat yourself overnight.
Is this much any energy you generate?
Every soul is right below it, Right?
And that's when the really tough freezing starts.
And thankfully, as I said, we were very lucky that ingenuity
made it to the first winter.
We're about to enter our second Mars Winter for the Mars 2020 mission here.
Perseverance is fine.
It has the Radioisotope thermoelectric Generator on board
so they have plenty of heat energy and electric energy.
But ingenuity will be, you know, every saw waking up and trying to heat herself.
But we couldn't have asked for any more out of this little spacecraft.
Right.
It's all sprinkled on top at this point.
Survived all that without a winter jacket.
So, yes, it's it's
we have just a couple more questions left, Jose on Facebook,
lots to know which is the most important discovery of ingenuity.
I'll start with you on that one.
And then hand over to Teddy,
the most important
discovery of ingenuity, the most important.
Gosh, there's so many things
that are important in terms of technology and how it will feed forward.
But I don't I know I'm not going to get the numbers right here,
but I think the ingenuity flying on Mars
is the equivalent to flying at 90,000 feet on Earth.
Teddy, Did I get that right? Close? Yeah. I mean,
yeah.
And that's from my understanding, that's that's impossible here, right?
So that they've made it possible on Mars.
I think that alone is pretty astounding.
But they, you know, over time, through those 72 flights, they increase
the speed, they increase the altitude, and they did left to right
and in a whole bunch of technology things and then helped the scientists as well.
All of it was was really amazing.
And I think also imaging E.T., the entry descent landing gear and
I think a lot of folks were really happy that they were able to get the
the detail that they could with those photos.
Teddy, do you have more to add on that?
Yeah, I couldn't agree on the aerodynamic front.
one thing that is
is close to my heart, right, is really the paradigm
shift in how we think about building things for space.
Right?
I've said it now five times
during NASA's science life, we used cell phone parts, right?
Low cost, high availability and no flight heritage.
Right. But we signed up for that challenge.
And what I would, you know, think of this as a call to action for future
generations is is the benefit is to try and see the benefit of taking those risks
because now you have what are you can think of them as supercomputers
on Mars right engine UTC chip is you know you take everything we send to Mars
and deep space the Voyager probes add it all up together.
Ingenuity's processor alone is more than a hundred times
more powerful than all that combined. Right.
And I really think that should unlock a lot of capability
for the next mission planners.
The next mission designers to try and harness that.
Right.
That's a huge leap forward and I'm excited to see
what the next robots on Mars and other planets are gonna be able to do
because of that new capability.
And that is all the time we have today.
So thank you both for joining us and providing some great answers.
Thank you so much for having me.
I really enjoyed it.
Thank you very much for go.
Really appreciate it.
Yeah.
And to learn more about the legacy of the Mars helicopter,
visit go nasa.gov slash ingenuity.
You're also invited to join us in celebrating Ingenuity's legacy
by sharing your favorite moments or farewell messages on social media
with the hashtag Thanks, Ingenuity.
You can also keep up with the Perseverance rover,
which is still exploring Jezero Crater on Facebook.
And congratulations to the team on this historic mission.
Now let's hear some parting thoughts from those who knew ingenuity best.
We have opened the skies of another planet.
Ingenuity really
opened the door for aerial exploration on Mars.
It's just been this plucky little helicopter that just defied
everybody's expectations.
I'm incredibly proud
and grateful for all that ingenuity has been able to give us.
What would you say the ingenuity during this time?
you're going to make me cry.
You know, what would I say to ingenuity?
It's really hard to say goodbye to you.
I would say thank you, ingenuity.
Thank you for bringing us all together.
Thank you for leading the charge in our adventure on Mars.
And we will never forget you. Rest well.
Thank you. Ingenuity. Thank you. Ingenuity.
Thanks. Ingenuity. Thanks. Ingenuity.