09:39
TEDGlobal 2011

Anna Mracek Dietrich: A plane you can drive

Filmed:

A flying car -- it's an iconic image of the future. But after 100 years of flight and automotive engineering, no one has really cracked the problem. Pilot Anna Mracek Dietrich and her team flipped the question, asking: Why not build a plane that you can drive?

- Inventor
Anna Mracek Dietrich is one of the creators of the Transition, the "plane you can drive." Full bio

What is it about flying cars?
00:15
We've wanted to do this for about a hundred years.
00:19
And there are historic attempts
00:22
that have had some level of technical success.
00:25
But we haven't yet gotten to the point
00:28
where on your way here this morning
00:31
you see something that really, truly seamlessly integrates
00:33
the two-dimensional world that we're comfortable in
00:36
with the three-dimensional sky above us --
00:39
that, I don't know about you, but I really enjoy spending time in.
00:41
We looked at the historical attempts that had been out there
00:44
and realized that, despite the fact
00:47
that we have a lot of modern innovations
00:49
to draw on today
00:51
that weren't available previously --
00:53
we have modern composite materials,
00:55
we have aircraft engines that get good fuel economy
00:57
and have better power-to-rate ratios than have ever been available,
01:00
we have glass cockpit avionics
01:03
that bring the information you need to fly
01:05
directly to you in the cockpit --
01:07
but without fundamentally addressing the problem from a different perspective,
01:09
we realized that we were going to be getting
01:12
the same result that people had been getting
01:14
for the last hundred years,
01:16
which isn't where we want to be right now.
01:18
So instead of trying to make a car that can fly,
01:20
we decided to try to make a plane that could drive.
01:24
And the result is the Terrafugia Transition.
01:27
It's a two-seat, single-engine airplane
01:30
that works just like any other small airplane.
01:32
You take off and land at a local airport.
01:34
Then once you're on the ground,
01:36
you fold up the wings, drive it home,
01:38
park it in your garage.
01:40
And it works.
01:42
After two years of an innovative design and construction process,
01:44
the proof of concept made its public debut
01:47
in 2008.
01:49
Now like with anything
01:51
that's really different from the status quo,
01:53
it didn't always go so well testing that aircraft.
01:55
And we discovered that it's a very good thing
01:58
that, when you go home with something that's been broken,
02:00
you've actually learned a lot more
02:03
than when you managed to tick off all of your test objectives
02:05
the first time through.
02:07
Still, we very much wanted to see
02:09
the aircraft that we'd all helped build
02:11
in the air, off the ground,
02:13
like it was supposed to be.
02:15
And on our third high-speed testing deployment
02:17
on a bitter cold morning in upstate New York,
02:19
we got to do that for the first time.
02:21
The picture behind me was snapped by the copilot in our chase aircraft
02:24
just moments after the wheels got off the ground for the first time.
02:27
And we were all very flattered to see that image
02:30
become a symbol of accomplishing something
02:32
that people had thought was impossible
02:34
really the world over.
02:36
The flight testing that followed that
02:39
was as basic and low-risk as we could make it,
02:41
but it still accomplished what we needed to
02:43
to take the program to the next step
02:45
and to gain the credibility that we needed
02:47
within our eventual market, the general aviation community,
02:49
and with the regulators
02:52
that govern the use of design of aircraft, particularly in the States.
02:54
The FAA, about a year ago,
02:57
gave us an exemption for the Transition
02:59
to allow us to have an additional 110 lbs.
03:01
within the light sport aircraft category.
03:04
Now that doesn't sound like a lot, but it's very important,
03:06
because being able to deliver the Transition as a light sport aircraft
03:09
makes it simpler for us to certify it,
03:12
but it also makes it much easier
03:14
for you to learn how to fly it.
03:16
A sport pilot can be certificated
03:18
in as little as 20 hours of flight time.
03:20
And at 110 lbs.,
03:22
that's very important for solving the other side of the equation --
03:24
driving.
03:27
It turns out that driving,
03:29
with its associated design implementation and regulatory hurdles,
03:31
is actually a harder problem to solve than flying.
03:34
For those of us that spend most of our lives on the ground,
03:37
this may be counter-intuitive,
03:39
but driving has potholes, cobblestones,
03:41
pedestrians, other drivers
03:44
and a rather long and detailed list
03:46
of federal motor vehicle safety standards to contend with.
03:48
Fortunately, necessity remains the mother of invention,
03:51
and a lot of the design work
03:54
that we're the most proud of with the aircraft
03:56
came out of solving the unique problems
03:58
of operating it on the ground --
04:00
everything from a continuously-variable transmission
04:02
and liquid-based cooling system
04:04
that allows us to use an aircraft engine
04:06
in stop-and-go traffic,
04:08
to a custom-designed gearbox
04:10
that powers either the propeller when you're flying or the wheels on the ground,
04:12
to the automated wing-folding mechanism that we'll see in a moment,
04:15
to crash safety features.
04:17
We have a carbon fiber safety cage
04:19
that protects the occupants
04:21
for less than 10 percent of the weight of a traditional steel chassis in a car.
04:23
Now this also, as good as it is, wasn't quite enough.
04:27
The regulations for vehicles on the road
04:30
weren't written with an airplane in mind.
04:32
So we did need a little bit of support
04:34
from the National Highway Traffic Safety Administration.
04:36
Now you may have seen in the news recently,
04:39
they came through with us at the end of last month
04:41
with a few special exemptions
04:43
that will allow the Transition to be sold
04:45
in the same category as SUVs and light trucks.
04:47
As a multi-purpose passenger vehicle,
04:49
it is now officially "designed for occasional off-road use."
04:51
(Laughter)
04:54
Now let's see it in action.
04:56
You can see there the wings folded up just along the side of the plane.
05:02
You're not powering the propeller, you're powering the wheels.
05:05
And it is under seven feet tall,
05:14
so it will fit in a standard construction garage.
05:16
And that's the automated wing-folding mechanism.
05:19
That's real time.
05:21
You just push a few buttons in the cockpit, and the wings come out.
05:23
Once they're fully deployed,
05:26
there's a mechanical lock that goes into place,
05:28
again, from inside the cockpit.
05:30
And they're now fully capable of handling
05:32
any of the loads you would see in flight --
05:34
just like putting down your convertible top.
05:36
And you're all thinking what your neighbors would think of seeing that.
05:41
(Video) Test Pilot: Until the vehicle flies,
05:47
75 percent of your risk is that first flight.
05:49
Radio: It actually flew. Yes.
05:56
Radio 2: That was gorgeous.
05:58
Radio: What did you think of that?
06:00
That was beautiful from up here, I tell you.
06:02
AMD: See, we're all exceedingly excited about that little bunny hop.
06:07
And our test pilot gave us
06:10
the best feedback you can get from a test pilot after a first flight,
06:12
which was that it was "remarkably unremarkable."
06:15
He would go onto tell us
06:18
that the Transition had been the easiest airplane to land
06:20
that he'd flown in his entire 30-year career as a test pilot.
06:22
So despite making something
06:33
that is seemingly revolutionary,
06:35
we really focused on doing
06:37
as little new as possible.
06:39
We leverage a lot of technology from the state-of-the-art in general aviation
06:41
and from automotive racing.
06:44
When we do have to do something truly out-of-the-box,
06:46
we use an incremental design, build, test, redesign cycle
06:48
that lets us reduce risk in baby steps.
06:51
Now since we started Terrafugia about 6 years ago,
06:53
we've had a lot of those baby steps.
06:55
We've gone from being three of us
06:57
working in the basement at MIT while we were still in graduate school
06:59
to about two-dozen of us
07:02
working in an initial production facility outside of Boston.
07:04
We've had to overcome challenges
07:07
like keeping the weight below the light sport limit that I talked about,
07:09
figuring out how to politely respond
07:11
when a regulator tells you,
07:13
"But that won't fit through a toll booth with the wings extended --
07:15
(Laughter)
07:18
to all of the other associated durability and engineering issues
07:21
that we talked about on the ground.
07:23
Still, if everything goes to our satisfaction
07:25
with the testing and construction
07:28
of the two production prototypes
07:30
that we're working on right now,
07:32
those first deliveries
07:34
to the, about a hundred, people who have reserved an airplane at this point
07:36
should begin at the end of next year.
07:38
The Transition will cost in line with other small airplanes.
07:40
And I'm certainly not out to replace your Chevy,
07:43
but I do think that the Transition should be your next airplane.
07:46
Here's why.
07:49
While nearly all of the commercial air travel in the world
07:51
goes through a relatively small number of large hub airports,
07:54
there is a huge underutilized resource out there.
07:57
There are thousands of local airstrips
08:00
that don't see nearly as many aircraft operations a day as they could.
08:02
On average, there's one within 20 to 30 miles
08:05
of wherever you are in the United States.
08:08
The Transition gives you
08:10
a safer, more convenient and more fun way
08:12
of using this resource.
08:15
For those of you who aren't yet pilots,
08:18
there's four main reasons why those of us who are
08:20
don't fly as much as we'd like to:
08:22
the weather, primarily,
08:24
cost, long door-to-door travel time
08:26
and mobility at your destination.
08:28
Now, bad weather comes in,
08:30
just land, fold up the wings, drive home.
08:32
Doesn't matter if it rains a little, you have a windshield wiper.
08:35
Instead of paying to keep your airplane in a hanger,
08:38
park it in your garage.
08:40
And the unleaded automotive fuel that we use
08:42
is both cheaper and better for the environment
08:44
than traditional avgas.
08:46
Door-to-door travel time is reduced,
08:48
because now, instead of lugging bags, finding a parking space,
08:51
taking off your shoes or pulling your airplane out of the hanger,
08:54
you're now just spending that time getting to where you want to go.
08:57
And mobility to your destination is clearly solved.
09:00
Just fold up the wings and keep going.
09:03
The Transition simultaneously expands our horizons
09:05
while making the world a smaller, more accessible place.
09:08
It also continues to be a fabulous adventure.
09:11
I hope you'll each take a moment
09:14
to think about how you could use something like this
09:16
to give yourself more access to your own world,
09:19
and to make your own travel more convenient and more fun.
09:21
Thank you for giving me the opportunity to share it with you.
09:24
(Applause)
09:27

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About the Speaker:

Anna Mracek Dietrich - Inventor
Anna Mracek Dietrich is one of the creators of the Transition, the "plane you can drive."

Why you should listen

Anna Mracek Dietrich is a private pilot trying to making aviation accessible, safe -- and a reasonable way to get to work. With husband Carl and their team at Terrafugia, in Massachusetts, they are building a driveable aircraft (or, as they also term it, the Roadable Aircraft), which is designed to fold its wings, enabling it to be driven like a car. In 2009, Terrafugia successfully flew a proof-of-concept model, and they anticipate that Transition, the first production model, should be on the road by the end of 2011.

She says: "The most common question we got was 'You know that's impossible, right?' Now that we've done it, I don't get that question nearly so often."

More profile about the speaker
Anna Mracek Dietrich | Speaker | TED.com