Near Falkirk inScotland, the Forth &
Clyde Canal meets with the Union
Canal, however at their meeting
point the two differ in height by
approximately 115 feet.
2.
Before the 1930s,travel between
these canals was provided by a
series of eleven conventional locks,
but they became disused and were
filled in about seventy-five years
ago.
3.
A brilliant, one-of-a-kindcontraption
was engineered which uses gravity
and Archimedes’ principle to transfer
boats between the two canals using
very little electricity
The Wheel isessentially two huge,
balanced water tanks suspended on
arms which rotate around a central
axis like a Ferris wheel.
7.
Each tank cansupport up to four
twenty-meter-long boats at one
time. Boats move into the tanks
through the lock gates, which
displaces a mass of water from each
tank equal to the weight of the
vessels.
8.
Archimedes' principle
Floating objectsdisplace their own
weight in water, so when the boat
enters, the amount of water leaving
the caisson weighs exactly the same
as the boat.
9.
The tanks arethus always equalized in
weight, allowing the pull of gravity
on the descending tank to do most
of the work elevating the rising
tank.
10.
This balance allowsthe wheel to
consume very little electricity per
turn despite the enormous weight
involved. It uses a mere 1.5 kilowatt-
hours, or roughly the equivalent
power needed to boil eight kettles of
water, each time it hefts a 600
metric ton load. It does this in under
four minutes per turn.
11.
The Wheel’s designis truly
revolutionary, as it is the only
rotating boat lift in the world. Its
beautiful form– reminiscent of a
Celtic double-headed ax– and its
graceful movement have made it a
bit of a tourist destination, with a
visitor’s center, a café, and
landscaped grounds nestled in the
natural amphitheater.
12.
Features
First structure of its kind in the
world.
Design life of at least 120 years.
35 metres high.
35 metres wide.
30 metres long.
Each gondola contains at least
250,000 litres of water.
Capable of carrying eight boats at a
time.
A single trip takes 15 minutes.
Construction
The wheel was constructed by
Butterley Engineering at Ripley in
Derbyshire under Millennium Plans to
reconnect the Forth and Clyde Canal
with the Union Canal, mainly for
recreational use.
15.
Operation
The wheel rotates together with the axle, which is
supported by four-metre-diameter slewing
bearings that are constructed on top of piled
foundations.
The slewing bearing has an inner ring gear which
acts as a rotating annulus.
The rotating annulus is driven by ten hydraulic
motors on the planet carrier.
The drive-shafts of the motors have pinion gears
which act as stationary planetary gears in this
train of gears and engage the rotating annulus
ring gear.
An electric motor drives a hydraulic pump which
is connected to the hydraulic motors by means of
hoses and drive the wheel at 1/8 revolution per
minute.
18.
Challenge
BW Scotland chief
civil engineer, George
Ballinger had to
complete a five year
construction project in
two.
19.
Planning
Bachy/Soletanche andMorrison (BSM)
Construction Joint Venture won the
contract to design and construct a new
section of canal, a tunnel beneath the
Antonine wall, a section of aqueduct, the
wheel and receiving basin.
20.
Planning
The exemplardesign was perceived as
unsuitable by British Waterways, therefore a
series of design workshops took place under the
direction of the architect RMJM to improve on
the aesthetics of the design.
Team members were instructed to attend these
workshops with just blank paper and an open
mind.
Two weeks of this style of brainstorming
developed the actual design
21.
Controlling
UK design codes for bridges, buildings and
floating vessels were utilised, as well as
Norwegian, German and American codes for
such criteria as thin walled cylinder behaviour
and constrained ice loading.
A 1:50 scale model was used in a wind-tunnel
for testing aerodynamic effects. Finite element
analysis using LUSAS Bridge aided the structural
design and included nonlinear solid continuum
modelling of movement sensitive connections.
22.
Controlling
The various parts of The Falkirk Wheel
were actually constructed and assembled,
like one giant Meccano set, at Butterley
Engineering’s Steelworks in Derbyshire. A
team there carefully assembled the 1,200
tonnes of steel, painstakingly fitting the
pieces together to an accuracy of just 10
mm to ensure a perfect final fit.
23.
Controlling
In the summer of 2001, the structure was
then dismantled and transported on 35
lorry loads to Falkirk, before all being
bolted back together again on the ground,
and finally lifted by crane in five large
sections into position.
24.
Controlling
The total 600 tonne weight of the water
and boat filled gondolas imposes immense
and constantly changing stresses on the
structure as it turns around the central
spine.
25.
Controlling
Normal welded joints of steel would be
susceptible to fatigue induced by these
stresses, so to make the structure more
robust, the steel sections were bolted
together.
Over 15,000 bolts were matched with
45,000 bolt holes, and each bolt was hand
tightened.
26.
Cost and pricing
The Falkirk Wheel cost £17.5 million, and the restoration
project as a whole cost £84.5 million (of which £32
million came from National Lottery funds).
The Falkirk Wheel Visitor Centre offers scheduled one-
hour, round trip boat tours, called "The Falkirk Wheel
Experience", that include passage on the wheel. The
tours start below the wheel in the Forth & Clyde Canal,
ascend via the wheel to the Union Canal, visit nearby
areas on the Union Canal, and then return.
As of 2008, the boat tour costs £8 for adults, £4.25 for
children aged 3-15 (free for children under 3), OAP
concession £6.50, student/state benefits concession
£6.50, and family price of £21.50 (2 adults and 2
children) with a discount of 10% for a group of 20 or
more.
27.
Due to floodingcaused by vandals, there
was a month’s delay before going into
operation, but on 24 May 2002 the Falkirk
Wheel officially opened as part of Queen
Elizabeth’s Golden Jubilee celebrations.
The Zen ofsarcasm
01) Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow.
Do not walk beside me either. Just pretty much leave me alone.
02) Don't be irreplaceable. If you can't be replaced, you can't be promoted.
03) Always remember that you're unique. Just like everyone else.
04) Never test the depth of the water with both feet.
05) If you think nobody cares if you're alive, try missing a couple of car payments.
06) Before you criticize someone, you should walk a mile in their shoes. That way, when you
criticize them, you're a mile away and you have their shoes.
07) Give a man a fish and he will eat for a day. Teach him how to fish, and he will sit in a boat
and drink beer all day.
08) If you lend someone $20 and never see that person again, it was probably a wise
investment.
09) If you tell the truth, you don't have to remember anything.
10) Some days you're the bug; some days you're the windshield.
11) Everyone seems normal until you get to know them.
12) The quickest way to double your money is to fold it in half and put it back in your pocket.
13) A closed mouth gathers no foot.
14) Duct tape is like 'The Force'. It has a light side and a dark side, and it holds the universe
together.
16) Generally speaking, you aren't learning much when your lips are moving.
17) Experience is something you don't get until just after you need it.
18) Never miss a good chance to shut up.
AND FINALLY
19) Never, under any circumstances, take a sleeping pill and a laxative on the same night.