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--captions by vitac--
Www.Vitac.Com
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Captions paid for by
Discovery communications
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Narrator:
The indy steering wheel
Isn't just for steering.
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00:00:56,551 --> 00:00:58,965
It's the control center
For the racecar,
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00:00:58,965 --> 00:01:00,517
Replacing the dashboard.
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00:01:00,517 --> 00:01:03,620
This incredible steering wheel
Is also detachable
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To allow the driver
To enter and exit the cockpit
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00:01:06,655 --> 00:01:08,206
Quickly and easily.
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00:01:08,206 --> 00:01:11,241
It's, quite simply,
Designed for speed.
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00:01:15,103 --> 00:01:18,482
The indy steering wheel is
A complex piece of equipment
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00:01:18,482 --> 00:01:21,517
That puts everything
At the driver's fingertips.
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00:01:21,517 --> 00:01:23,965
It starts
With a full-scale design,
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00:01:23,965 --> 00:01:28,379
Customized to the driver's
Racing style and preferences.
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00:01:28,379 --> 00:01:30,137
The technician aligns
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00:01:30,137 --> 00:01:32,793
The traditional racing
Steering wheel with the drawing,
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00:01:32,793 --> 00:01:36,241
And marks it
For a complete remodel.
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00:01:36,241 --> 00:01:39,758
He cuts out
The leather and foam wrap
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00:01:39,758 --> 00:01:41,965
Within the marked lines
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00:01:41,965 --> 00:01:45,103
And saws off a chunk
Of the aluminum frame.
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00:01:49,862 --> 00:01:52,379
He then activates
A computerized cutter
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00:01:52,379 --> 00:01:55,758
That carves away a big section
Of the steering wheel hub.
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00:01:55,758 --> 00:01:59,000
It also cuts holes for switches.
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With these changes,
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00:02:01,137 --> 00:02:04,379
The steering wheel is ready
To accommodate a panel
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00:02:04,379 --> 00:02:07,241
With over two dozen controls
And gauges.
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00:02:07,241 --> 00:02:10,275
Next, more computerized tooling
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00:02:10,275 --> 00:02:13,931
Transforms a sheet
Of carbon fiber
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00:02:13,931 --> 00:02:16,827
Into the steering wheel's
Switch plate.
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00:02:16,827 --> 00:02:21,413
It cuts out holes
For screws and switches,
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00:02:21,413 --> 00:02:25,689
And it creates slots
For the shift and clutch panels.
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00:02:25,689 --> 00:02:28,724
The tool then zigzags
Around the perimeter
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00:02:28,724 --> 00:02:32,758
To trim the switch plate to fit
The modified steering wheel.
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00:02:38,206 --> 00:02:39,965
With the trimmings removed,
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00:02:39,965 --> 00:02:43,068
The switch plate is ready
For the working parts.
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00:02:43,068 --> 00:02:46,103
The next technician plugs
The color-coded switches
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00:02:46,103 --> 00:02:48,551
Into the holes
And locks them in place
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00:02:48,551 --> 00:02:52,275
With nuts
And anti-vibration washers.
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00:02:52,275 --> 00:02:55,000
The yellow one
Is a pit-lane speed limiter.
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00:02:55,000 --> 00:02:56,896
As the name suggests,
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00:02:56,896 --> 00:03:00,896
It will limit the car's speed
In the pit lane.
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00:03:00,896 --> 00:03:02,793
Once all the switches
Have been installed,
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He runs wires to them
And solders the connections.
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00:03:07,137 --> 00:03:09,448
This completes the circuitry.
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00:03:12,379 --> 00:03:15,551
He coats each connection
With silicone sealant.
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00:03:15,551 --> 00:03:19,206
This weather-proofs them
And further dampens vibrations.
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00:03:19,206 --> 00:03:21,241
And for additional protection,
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00:03:21,241 --> 00:03:24,413
He applies glue to the plastic
Sheathing around the wires.
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00:03:24,413 --> 00:03:27,793
He adds a rubber boot
To each connection.
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00:03:27,793 --> 00:03:30,620
The boot fits loosely
Around it at first,
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00:03:30,620 --> 00:03:32,172
But, using a heat gun,
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00:03:32,172 --> 00:03:35,068
He shrinks
The specially formulated rubber
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00:03:35,068 --> 00:03:36,379
To the connection.
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00:03:36,379 --> 00:03:40,517
This makes the boot fit
Like it was made for it.
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00:03:43,586 --> 00:03:45,931
The indy-steering-wheel
Switch plate
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00:03:45,931 --> 00:03:47,689
Is now ready
For the shift paddles.
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00:03:47,689 --> 00:03:52,344
So next, the technician screws
A spacer plate into the slot.
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00:03:52,344 --> 00:03:55,758
This metal spacer slightly
Elevates the paddle mechanism
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00:03:55,758 --> 00:03:58,379
To give it the right amount
Of clearance.
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00:03:58,379 --> 00:04:04,034
He screws the paddle assembly
To the spacer.
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00:04:04,034 --> 00:04:07,827
He installs the second shift
Paddle and two clutch paddles.
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00:04:07,827 --> 00:04:11,655
Then he inserts the rotary
Switch for fuel mapping
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00:04:11,655 --> 00:04:14,586
And secures it
With a washer and nut.
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00:04:14,586 --> 00:04:18,620
This fuel-mapping system
Will adjust the fuel-air mix
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00:04:18,620 --> 00:04:21,379
To boost or decrease
Power output.
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00:04:23,551 --> 00:04:27,965
He adds little decals with icons
To the color-coded switches.
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00:04:31,689 --> 00:04:35,758
A radio-transmission icon marks
The communication switch.
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He returns
To the steering wheel now.
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He attaches a unit
That displays rpm
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00:04:44,758 --> 00:04:47,965
And other information
That a normal dash would have.
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00:04:47,965 --> 00:04:54,689
He screws it
To the exposed aluminum frame.
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He's now ready to mount
The completed switch plate
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To the steering wheel.
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Three bolts to the hub
Secure the assembly.
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00:05:09,172 --> 00:05:11,896
He installs
A spring-loaded mechanism
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At the back
Of the steering wheel
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That will allow
The steering wheel
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To be installed or removed
In half a second.
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He tests the two shift paddles
And the two clutch paddles
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And confirms
They operate smoothly.
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Finally,
He attached dense padding
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To the steering-wheel hub
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For a soft landing
For the driver's head
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In the even of a crash.
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This indy steering wheel costs
As much as a small compact car.
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But for the driver and crew,
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It's worth the investment
If it helps win the prize.
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Narrator: people have been
Dining on edible greens
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For thousands of years.
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Traditionally collected
In the wild,
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Today, there's no need
To forage for them
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Because field greens
Are cultivated commercially.
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They're mixed, washed,
And packaged
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For the consumer's convenience.
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It's an easy dish
To toss together.
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Packaged mixed greens combine
Mild-tasting leaves
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With stronger-tasting ones
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And crunchy greens
With more tender ones.
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So when it comes
To texture and flavor,
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It's truly a mixed bag.
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They cultivate up to 20
Different kinds of greens
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On this california farm,
And they aren't all green.
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Some are red.
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They plant the various lettuces
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According to the recipes
For different packaged salads
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So they'll have
Just the right combination.
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With regular irrigation
And fertilization,
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The leaves flourish.
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It makes for a stunning
Red-and-green display
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In the field.
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After 30 to 45 days,
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These baby greens
Are ready for harvest.
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A machine with a long blade
Moves across the field
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00:07:14,965 --> 00:07:17,931
And literally mows
The field greens.
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The greens flow
Onto one conveyor
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And transfer to another.
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The belt is a metal-mesh one
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To sift out contaminants
Like small rocks and twigs.
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At the end
Of the sifting conveyor,
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The salad greens fly off
And onto another belt.
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This belt serves them up to bins
On a flatbed trailer,
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Creating an enormous salad
In each one.
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Workers cover the bins
With plastic
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And haul them
To a nearby processing plant.
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00:07:58,862 --> 00:08:02,724
On arrival,
The salad greens transfer
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00:08:02,724 --> 00:08:05,724
To a vacuum-cooling chamber
To chill.
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00:08:05,724 --> 00:08:09,172
The vacuum causes moisture
On the greens to evaporate.
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As the water evaporates,
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It absorbs heat
To lower the temperature
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00:08:13,448 --> 00:08:14,827
And cool the greens.
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00:08:14,827 --> 00:08:19,827
The salad greens then head
Into an optical sorter.
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00:08:19,827 --> 00:08:23,000
Here,
Computerized cameras and lasers
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00:08:23,000 --> 00:08:25,034
Scan the greens for flaws,
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00:08:25,034 --> 00:08:28,172
Like discoloration
And foreign material.
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The operator has programmed
The system
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00:08:31,068 --> 00:08:33,344
To detect flaws or contaminants.
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00:08:33,344 --> 00:08:35,206
When the computer finds one,
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00:08:35,206 --> 00:08:39,655
It sends a signal to an air jet
That expels it.
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00:08:39,655 --> 00:08:44,827
Some good leaves get lost
Along the way -- about 3%.
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00:08:44,827 --> 00:08:47,482
It's considered
An acceptable loss.
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The rejects will be composted.
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Out of the optical sorter,
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An employee tosses in
The bitter greens,
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00:08:55,655 --> 00:08:58,965
Like radicchio and frisée.
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00:08:58,965 --> 00:09:03,137
This moving salad now heads
Into a three-part wash system.
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00:09:03,137 --> 00:09:06,862
The first wash tank
Has rolling perforated cylinders
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00:09:06,862 --> 00:09:09,862
That keep the greens submerged
For washing.
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00:09:09,862 --> 00:09:12,482
They also pick up
Unwanted tiny leaves
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00:09:12,482 --> 00:09:14,379
And remove them from the mix.
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00:09:14,379 --> 00:09:17,448
The salad greens transfer
To a vibrating conveyor
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00:09:17,448 --> 00:09:19,034
That shakes out the water.
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00:09:19,034 --> 00:09:21,689
Then they travel
Through a second wash tank
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00:09:21,689 --> 00:09:24,965
And finally receive a third wash
From overhead sprayers.
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00:09:24,965 --> 00:09:27,275
The washed salad greens
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Fall into plastic containers
With perforations.
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00:09:30,413 --> 00:09:33,241
They're essentially
Very large colanders.
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00:09:33,241 --> 00:09:37,862
They transfer each colander
To a centrifuge and power up.
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00:09:37,862 --> 00:09:39,793
It spins the colander,
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00:09:39,793 --> 00:09:42,344
And this causes the moisture
On the greens
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To drain
Through there perforations.
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This leaves them dry and crisp.
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It is a large-scale version
Of the salad spinner
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Many people have
In their kitchens.
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These field greens are now ready
For the packaging line.
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It's an entirely mechanized
System with an endless appetite.
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The greens funnel through
A hopper and land in buckets.
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00:10:20,137 --> 00:10:21,827
This is a weighing operation.
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There's a scale
Under each bucket.
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When the target weight
Is reached,
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The bucket releases the greens.
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00:10:34,068 --> 00:10:38,827
They slide down chutes
Into the bagging machine.
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These salad greens are
Still living, breathing plants.
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The packaging
Will slow their respiration
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00:10:43,793 --> 00:10:47,448
And put the aging process
On hold.
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00:10:47,448 --> 00:10:50,275
Machinery hermetically seals
Them in plastic
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00:10:50,275 --> 00:10:54,000
To give them a shelf life
Of 14 days to 19 days.
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And with that availability,
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There's no excuse
Not to eat your greens.
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Narrator: wind turbines use
An unlimited natural resource,
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The wind, to produce electricity
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00:11:13,965 --> 00:11:16,137
Without polluting
The environment.
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A turbine consists of a rotor
And a massive propeller
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00:11:19,724 --> 00:11:22,896
That spins in the wind
On top of a high tower.
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It drives a built-in generator
That produces electricity.
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The higher up you go,
The windier it is.
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So the taller the turbine,
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00:11:36,724 --> 00:11:39,275
The more wind power
It harnesses.
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They may not look it
From a distance,
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But wind turbines can be
As high as a 20-story building
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With rotor blades
Half a football field long.
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To begin constructing
Those massive blades,
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Workers prepare
Fiberglass sheets,
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00:11:56,310 --> 00:12:00,896
Each one numbered according
To a detailed engineering plan.
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00:12:00,896 --> 00:12:02,931
Then, following the plan,
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00:12:02,931 --> 00:12:06,551
Workers lay down specific sheets
In designated locations
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00:12:06,551 --> 00:12:09,344
In the bottom half
Of a blade-shaped mold.
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00:12:14,241 --> 00:12:16,862
For a blade
To be free of defects,
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00:12:16,862 --> 00:12:19,482
Each sheet
Must lie perfectly flat.
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00:12:19,482 --> 00:12:21,310
So, using a smoothing tool,
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00:12:21,310 --> 00:12:24,034
Workers remove air bubbles
And creases.
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00:12:29,103 --> 00:12:30,793
The surface of the mold cavity
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00:12:30,793 --> 00:12:32,931
Is treated
With a non-stick coating.
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00:12:32,931 --> 00:12:35,758
This will prevent the blade
From adhering to the mold
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00:12:35,758 --> 00:12:37,275
When they extract it.
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00:12:37,275 --> 00:12:41,275
After placing all the sheets
In the bottom half of the mold,
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00:12:41,275 --> 00:12:44,482
Workers construct
The upper part of the blade
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00:12:44,482 --> 00:12:48,620
By laying fiberglass sheets on
The top half of the blade mold.
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00:12:48,620 --> 00:12:52,034
Again, every single sheet
Is numbered and positioned
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00:12:52,034 --> 00:12:54,482
According
To the blade-design plan.
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00:12:54,482 --> 00:13:00,482
An area of the mold can have
From for to 120 layered sheets
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00:13:00,482 --> 00:13:02,862
Of varying thickness, weights,
And weaves,
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00:13:02,862 --> 00:13:05,586
Depending
On how structurally strong
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00:13:05,586 --> 00:13:08,137
That part of the blade
Has to be.
213
00:13:08,137 --> 00:13:10,758
To make specific areas
More rigid,
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00:13:10,758 --> 00:13:14,275
Between layers of fiberglass
They install balsa,
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00:13:14,275 --> 00:13:16,344
An extremely lightweight wood.
216
00:13:16,344 --> 00:13:19,000
Cut channels enable
The balsa panels
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To flex to the shape
Of the blade.
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00:13:21,551 --> 00:13:24,103
The channels
Are also the pathways
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00:13:24,103 --> 00:13:27,310
Through which the bonding agent
Epoxy will flow
220
00:13:27,310 --> 00:13:30,586
To saturate the wood
And surrounding fiberglass.
221
00:13:33,068 --> 00:13:37,793
Precision in the setup of
Fiberglass and wood is critical.
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00:13:37,793 --> 00:13:41,827
The process takes
A team of six workers 16 hours.
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00:13:44,000 --> 00:13:45,448
They close up the mold
224
00:13:45,448 --> 00:13:48,310
By lowering the top half
Onto the bottom half.
225
00:13:50,862 --> 00:13:54,931
Then they inject the epoxy.
226
00:13:54,931 --> 00:14:01,724
Simultaneously, workers heat the
Mold to 158 degrees fahrenheit.
227
00:14:01,724 --> 00:14:03,586
This aids the chemical reaction
228
00:14:03,586 --> 00:14:05,931
Between
The epoxy's two components --
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00:14:05,931 --> 00:14:08,551
A resin and a hardener.
230
00:14:08,551 --> 00:14:12,689
After 9½ hours,
The epoxy is fully cured.
231
00:14:12,689 --> 00:14:14,206
With overhead cranes,
232
00:14:14,206 --> 00:14:17,068
They lift away
The top half of the mold,
233
00:14:17,068 --> 00:14:20,793
Revealing a turbine blade
Measuring up to 60 yards long,
234
00:14:20,793 --> 00:14:25,206
Weighing in at about 10 tons.
235
00:14:31,724 --> 00:14:35,206
Using lifting devices positioned
At specific locations,
236
00:14:35,206 --> 00:14:39,068
They slowly extract the blade
From the bottom half of the mold
237
00:14:39,068 --> 00:14:46,000
And lay it onto a stand
To cool for 4½ hours.
238
00:14:51,344 --> 00:14:55,206
Workers then transfer the blade
To a mill-and-drill machine,
239
00:14:55,206 --> 00:14:58,724
Which shapes the open end
To align with the rotor hub.
240
00:14:58,724 --> 00:15:02,310
The machine also drills holes
For the 54 pin bolts
241
00:15:02,310 --> 00:15:04,965
That will fasten the blade
To the hub.
242
00:15:04,965 --> 00:15:08,275
Next, workers grind away
The seam of hardened epoxy
243
00:15:08,275 --> 00:15:11,448
That formed where the two halves
Of the mold met
244
00:15:11,448 --> 00:15:14,413
And sand the surface
Perfectly smooth.
245
00:15:14,413 --> 00:15:18,034
Then they spray the blade
With a coat of primer,
246
00:15:18,034 --> 00:15:20,206
Which they let cure
For six hours.
247
00:15:20,206 --> 00:15:22,758
Then a coat
Of epoxy-based paint,
248
00:15:22,758 --> 00:15:25,689
Letting that cure
For about eight hours.
249
00:15:25,689 --> 00:15:29,517
Then workers insert
Those 54 pin bolts
250
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Made of a particularly strong
Grade of steel
251
00:15:32,482 --> 00:15:35,137
And tighten them
With a torque wrench.
252
00:15:35,137 --> 00:15:38,551
After this, they weigh
Each blade on a floor scale
253
00:15:38,551 --> 00:15:42,172
And group three blades
Of similar weight per turbine
254
00:15:42,172 --> 00:15:45,482
To ensure the rotation
Will be balanced.
255
00:15:45,482 --> 00:15:48,724
The install a cover
Over the opened end of the blade
256
00:15:48,724 --> 00:15:51,137
To prevent debris
From falling inside
257
00:15:51,137 --> 00:15:53,413
During transport
To the wind farm.
258
00:15:55,620 --> 00:15:58,931
Upon arrival, crews bolt
Three blades to a rotor hub,
259
00:15:58,931 --> 00:16:02,241
Then hoist the rotor
To the top of the turbine tower
260
00:16:02,241 --> 00:16:05,103
And connect it to the nacelle.
261
00:16:17,724 --> 00:16:20,103
Narrator: the nacelle
Is the part of a wind turbine
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00:16:20,103 --> 00:16:22,172
Which transforms wind power
Into electricity.
263
00:16:22,172 --> 00:16:24,068
With the rotor mounted to it,
264
00:16:24,068 --> 00:16:26,620
The nacelle houses
A giant drivetrain.
265
00:16:26,620 --> 00:16:30,241
It multiplies the rotational
Speed of the spinning blades
266
00:16:30,241 --> 00:16:32,862
Then transfers it
To a massive generator,
267
00:16:32,862 --> 00:16:34,517
Which produces electricity.
268
00:16:37,827 --> 00:16:40,827
A wind turbine's rotor
Is made of three blades
269
00:16:40,827 --> 00:16:42,241
Attached to a hub.
270
00:16:42,241 --> 00:16:45,172
The hub alone weighs
More than 30 tons.
271
00:16:45,172 --> 00:16:49,655
It's cast from ductile iron,
A strong grade of cast iron.
272
00:16:52,172 --> 00:16:55,310
At the factory, they use a crane
To hoist and affix
273
00:16:55,310 --> 00:16:57,862
The hub casting
To an assembly fixture.
274
00:16:57,862 --> 00:17:03,000
This fixture holds the hub
Securely in a suspended position
275
00:17:03,000 --> 00:17:05,206
While workers mount components
To it,
276
00:17:05,206 --> 00:17:07,310
Starting
With three blade bearings.
277
00:17:07,310 --> 00:17:10,034
A blade bearing
Is a giant ball bearing
278
00:17:10,034 --> 00:17:12,068
To which the blade is attached.
279
00:17:12,068 --> 00:17:15,172
When it rotates,
The blade pitches,
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00:17:15,172 --> 00:17:17,310
Meaning it changes angle.
281
00:17:17,310 --> 00:17:19,965
Blades need to be pitched
To better catch the wind
282
00:17:19,965 --> 00:17:22,758
And to spin at optimal speed.
283
00:17:22,758 --> 00:17:28,482
Each bearing attaches to the hub
With 54 huge bolts.
284
00:17:28,482 --> 00:17:32,068
The next hub components --
Three accumulators --
285
00:17:32,068 --> 00:17:34,137
One for each blade bearing.
286
00:17:34,137 --> 00:17:38,000
An accumulator stores
Hydraulic oil under pressure.
287
00:17:38,000 --> 00:17:40,862
This oil moves
Hydraulic cylinders,
288
00:17:40,862 --> 00:17:44,482
Which rotate the blade bearing
To pitch the blade.
289
00:17:44,482 --> 00:17:47,103
Workers assemble
Each accumulator,
290
00:17:47,103 --> 00:17:50,655
Mount its cover,
291
00:17:50,655 --> 00:17:53,517
Then install it
On a blade bearing.
292
00:18:00,413 --> 00:18:02,310
Once all three accumulators
293
00:18:02,310 --> 00:18:04,793
And other components
Are installed,
294
00:18:04,793 --> 00:18:06,241
The hub is finished.
295
00:18:06,241 --> 00:18:08,724
They remove it
From the assembly fixture
296
00:18:08,724 --> 00:18:11,344
And put a fiberglass cover
Over each bearing
297
00:18:11,344 --> 00:18:13,103
To protect the workings inside.
298
00:18:15,931 --> 00:18:18,034
Meanwhile, in the same factory,
299
00:18:18,034 --> 00:18:21,034
Workers assemble
The wind turbine's nacelle.
300
00:18:21,034 --> 00:18:22,448
First, they lay out
301
00:18:22,448 --> 00:18:25,275
The bottom section
Of its steel housing,
302
00:18:25,275 --> 00:18:28,551
Then they assemble
The yaw system,
303
00:18:28,551 --> 00:18:31,758
The key component that enables
The nacelle and rotor
304
00:18:31,758 --> 00:18:34,655
To rotate 360 degrees.
305
00:18:34,655 --> 00:18:36,655
They mount
A large stationary gear
306
00:18:36,655 --> 00:18:38,931
In the center
Of the system's mainframe.
307
00:18:38,931 --> 00:18:42,517
Then, on the reverse side
Of the mainframe,
308
00:18:42,517 --> 00:18:44,862
They install eight yaw gears.
309
00:18:44,862 --> 00:18:49,517
These smaller gears engage the
Large gear on the other side.
310
00:18:51,862 --> 00:18:56,379
Fully assembled, the mainframe
Weighs more than 22 tons.
311
00:18:56,379 --> 00:19:00,275
Workers hoist it with a crane,
Then install it
312
00:19:00,275 --> 00:19:03,448
Into the bottom section
Of the nacelle's steel housing.
313
00:19:03,448 --> 00:19:04,862
They connect the gearbox
314
00:19:04,862 --> 00:19:07,551
To the rest
Of the nacelle's drivetrain.
315
00:19:07,551 --> 00:19:10,448
It works like a car transmission
In reverse.
316
00:19:10,448 --> 00:19:13,655
While the car transmission
Takes combustion-produced energy
317
00:19:13,655 --> 00:19:16,724
And turns it into rotation --
The car wheel's turning --
318
00:19:16,724 --> 00:19:19,206
The nacelle drivetrain
Takes rotation --
319
00:19:19,206 --> 00:19:21,413
The blades spinning
In the wind --
320
00:19:21,413 --> 00:19:23,379
And turns it
Into electrical energy.
321
00:19:23,379 --> 00:19:24,862
Those spinning blades rotate
322
00:19:24,862 --> 00:19:27,896
The drivetrain's
Massive steel shaft.
323
00:19:27,896 --> 00:19:31,344
The opposite end of that shaft
Connects to the gearbox.
324
00:19:31,344 --> 00:19:34,103
The gear's multiply
The speed of rotation,
325
00:19:34,103 --> 00:19:35,793
Rotating the second shaft,
326
00:19:35,793 --> 00:19:38,034
Which they now connect
To a generator,
327
00:19:38,034 --> 00:19:40,241
Installed inside
The nacelle housing.
328
00:19:40,241 --> 00:19:42,965
The second shaft
Powers the generator,
329
00:19:42,965 --> 00:19:44,827
Which produces electricity.
330
00:19:44,827 --> 00:19:48,137
After connecting the drivetrain
To the generator,
331
00:19:48,137 --> 00:19:51,275
Workers install
The top section of the housing,
332
00:19:51,275 --> 00:19:54,310
As well as access doors
For maintenance work.
333
00:19:57,068 --> 00:19:59,793
Technicians
Conduct various tests
334
00:19:59,793 --> 00:20:02,551
To make sure
Everything runs properly.
335
00:20:02,551 --> 00:20:06,448
Here, they are verifying the fan
That cools the generator.
336
00:20:17,068 --> 00:20:21,172
The finished nacelle looks like
A mammoth aa battery.
337
00:20:21,172 --> 00:20:23,931
It weighs 85 tons.
338
00:20:23,931 --> 00:20:26,793
Nearly half of that
Is the drivetrain.
339
00:20:29,827 --> 00:20:32,862
The plant ships
Both the nacelle and the hub
340
00:20:32,862 --> 00:20:36,310
Separately to the wind farm
By either truck or rail.
341
00:20:36,310 --> 00:20:38,620
The blades are shipped
To the farm
342
00:20:38,620 --> 00:20:41,862
From another factory
And the tower from yet another.
343
00:20:45,482 --> 00:20:49,758
Once all the parts arrive
On site, assembly can begin.
344
00:20:49,758 --> 00:20:52,344
Crews first direct the tower.
345
00:20:52,344 --> 00:20:56,206
Then they hoist the nacelle all
The way to the top and mount it.
346
00:20:56,206 --> 00:20:58,724
On the ground,
They assemble the rotor
347
00:20:58,724 --> 00:21:01,137
By installing the blades
In the hub.
348
00:21:01,137 --> 00:21:05,103
Then they hoist the rotor
To the top of the tower
349
00:21:05,103 --> 00:21:07,448
And mount it to the nacelle.
350
00:21:07,448 --> 00:21:11,482
And from that point on,
The wind does all the work.
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00:21:23,793 --> 00:21:26,172
If you have any comments
About the show,
352
00:21:26,172 --> 00:21:28,620
Or if you'd like to suggest
Topics for future shows,
353
00:21:28,620 --> 00:21:30,793
Drop us a line at...
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