Guest Post by Willis Eschenbach
Due to good fortune and the WUWT readership, we got the chance to not only see the Falkirk Wheel, but to take a ride on it … what a marvelous piece of Scottish engineering. No wonder the engineer on the Starship Enterprise was “Scotty” … here’s the wheel, on a lovely day of rain and sun, but mostly rain. Or what is known as “un-made whisky”, as I’m told rain is called locally:
The wheel rotates to move boats up and down, in lieu of a system of locks, to overcome the difference in height between two canals above and below. When you’ve been moved up from the bottom to the top, you are looking out along an elevated waterway that you can see below:
We didn’t go far on the canal, just through the tunnel and back. The gorgeous ex-fiancée and I take care of her father, who is 85 and legally blind. We’re always looking for things that he can do, and so we were graciously given a very short ride on a boat that is used to carry disabled people along the canals, so that they can be safely out and moving in the fresh air. It would be perfect for the old man, he loves the water but has trouble on the ocean, so we’ll see if we can find something equivalent back in the States.
The boat is one of ten that is operated by a charity called the “Seagull Trust Cruises”. I have been amazed by the amount and extent of work that is done by various charities in the UK. Many things that are done (poorly) by the government in the US are done, and done well, by the charities in the UK. For example, the Seagull Trust Cruises operates totally on public donations, and is staffed entirely by volunteers … and they’ve given free rides to over a million disabled people to date. What a wonderful gift for someone cooped up in a nursing home, or homebound for some chronic medical problem, to be able to take a canal cruise.
So I put £20 into the charity right there on the spot, and if anyone else is so inclined, their website is here, it’s a good cause. They’re set up to take people on wheelchairs, and every penny of the money goes to the actual operating expenses—no one, from the highest to the lowest, takes any money at all for their time.
The engineering on the Falkirk Wheel is so well-balanced that it only takes about the amount of energy needed to toast three slices of toast to rotate the wheel by a half turn, boats, water and all … it’s all computer controlled, and if the water levels in the two chambers are different by more than 75 mm (3″), the whole thing stops. Here’s a view from the top of the wheel, just prior to starting back down:
And here are the gears that make it all go round …
From there, an old sea-dog who reads WUWT took us on a tour of the “kirk”, or church, for which Falkirk is named. First, though, we stopped at the Antonine wall. It served the same purpose as the better-known Hadrians wall, regulating commerce. Unlike Hadrian’s Wall, however, it was built of turf, and has since disappeared. All that is left are the trench that was excavated to provide the turf for the wall and increase its height, and the heap of earth on the left that is where the wall once stood:
I was irresistibly reminded of Matsuo Basho’s haiku, written on a battlefield that was already ancient in the 1600’s …
Summer grass
Of stalwart warriors’ spendid dreams
The aftermath …
We were then taken on a guided tour of the Falkirk church. “Falkirk” means “spotted church”, because the original church (built in 36,000BC or some such date) was built with stones of different colors. The church feed lunch every day to the homeless, and the cost of that is recovered by selling the same meals to anyone who comes in … so we started out with lunch at the church. Like the Seagull Trust, the restaurant is completely staffed by volunteers.
Inside, the church is very unusual, because it’s rounded. Unlike most churches, it felt well-worn and well-loved. The best part of the tour, though, was we went up into the belfry.

I’ve never been up in an actual belfry before, in the US churches generally have loudspeakers … the old sea-dog said bells were a gift from the Dollar family of San Francisco … “The owners of the Dollar Steamship Lines?” I asked, because that name is very familiar on the West Coast. Yes, I was told, the family came from Falkirk, and they had the bells made in the US and shipped back to the old country after they’d made their fortune.
And wonder of wonders, I was invited to play the bells! Rather than subject the entire city to a novice, I just played a few notes … I’ve never, ever played an acoustic instrument of that power, it was astonishing. The only thing I can compare it to, which some may understand, is driving a D10 Caterpillar dozer … raw unbridled strength at my fingertips.
Parts of the church are made of sandstone … and it is so old that the very stones themselves have been worn away, not by people or by traffic, but by the rain … where I grew up, that only happens to mountains. The folks of Falkirk appear to be harder than their sandstone, however, if this plaque near the church is accurate …
The old sea-dog had graciously invited us to spend the night at his home, and on the way there we stopped at the Carron Iron Works … or more accurately, a monument to the former Carron works, cheaper ironwork from the Japanese drove them out of business. There I learned that a “carronade”, which is a small cannon which I’d read about in many histories of the period, was named after the Carron works. It’s a lethal affair designed to shoot “grape-shot” at infantry, basically a shotgun on steroids.
All that’s left of the works now are a couple of cannons and carronades … the cannon in the background is one of two surviving cannons from the battle of Waterloo, the other is to the left of it just out of the picture.
The Carron Iron Works was also the company that made the first steam boiler for James Watt, a part of which is mounted in the wall of the monument:
“Stalwart warriors’ splendid dreams” indeed …
We had a lovely evening with the old sea-dog and his good lady, listening to stories of life at sea as recounted by he and his wife, who had accompanied him around the world, and tales of battles in Falkirk won and lost. I can’t thank them enough for their hospitality and the insights into Scotland and life in the north.
The next day we rolled on to Edinburgh, where we are now … but that’s a story for another day, we’re off to see Mary King’s Close.
My best to all, more to come,
w.
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John Robertson says:
September 14, 2013 at 11:37 pm
Check the masthead, John. This blog is not just about climate science, and it is not just about science. It says “Comments on puzzling things in life, nature, science …”
If you don’t like my contributions, then SKIP THEM … how tough can that be? Because reading them, and then whining about them, just makes people point and laugh. As the comments show, many people enjoy my non-scientific writings greatly, and encourage me to write more, so you are in a distinct minority.
w.
Stacey says:
September 15, 2013 at 2:44 am
Sorry, but at the sea dog’s request, that’s between him and me.
And the NSA, of course …
w.
@Sam the First
And that’s why it’s called the British Empire. not the English Empire. We should not forget the contributions of the Welsh and the Irish either.
Our constitutional arrangements are not hard to understand. England, Wales, Scotland and (Northern) Ireland come together to make the ‘United Kingdom of Great Britain and Northern Ireland’. Just like 50 or so states come together to make the USA. England is the biggest of the four but it is as wrong to refer to the UK as England as it is to refer to the USA as Texas..or vice versa.
Willis, I am sure you will be visiting the Forth Bridge whilst in Edinburgh. Both my parents ashes were spread from the middle span of the rail bridge. It is quite a walk from Dalmeny station along the side of the track to the middle span. It was my fathers request as he regarded it as his “gateway” home from his travels around the world when in the army during WW2 back to his home in Aberdeen..
When my younger brother died 5 years ago he also wanted the same done with his ashes. Unfortunately due to health and safety reasons ScotRail Engineering wouldn’t let us, and so we thankfully gained permission from the Forth Road Bridge authority.
Ah Willis just because its you I won’t pursue the FOI request;-)
You have proven though that there are some things we just can’t google?
Enjoy the rest of your trip and keep the reports coming.
On your way south try to drive over the world’s (now 2nd) longest suspension bridge over the river Humber.
tobias:
At September 15, 2013 at 2:50 am you ask
I don’t know, but we would be nowhere without string which is the second greatest human invention (use of fire being the greatest).
String permits, masonry, geometry, trigonometry, cloth, sewing, rope, pulleys, ties, animal halters, etc., etc,. etc.
Richard
Willis>
“the cannon in the background is one of two surviving cannons from the battle of Waterloo”
Not sure if you intended to imply there are only two surviving Waterloo cannon, or if it was merely clumsy phrasing, but there are of course many more than that.
On the subject of the gun-carriage, I suspect the one in your picture is on something called an armoury mount, or some such, rather than a field mount. I’ve never seen one definitively labelled, but it sounds like descriptions I’ve read.
kadaka (KD Knoebel) says: September 14, 2013 at 7:04 pm
Umm, that’s not Archimedes’ Principle. ….. Hopefully you can see there could be a concrete barge in one chamber, a small rowboat in the other, the water level relative to the chambers would be the same in both while the total weights are not the same.
The total weights ARE the same. Imagine two sealed-off caissons each with the same amount of water. One remains empty and in the other you place a barge. The caisson with the barge will now weigh more than the empty one by the amount of the weight of the barge. The level of water in the caisson with the barge will now also be higher. The amount of water that rose will weigh exactly the weight of the added barge. (Drain that much water off to make its water level the same as the empty one and the caissons weigh the same again.)
I think that is indeed Archimedes Principle. “Buoyant force” in any object that floats is ALWAYS equal to the weight of the object.
richardscourtney says:
I don’t consider fire itself as being an “invention”; It was around a long time before we were. I think using fire to cook food is an invention for example, (arguably the most important thing we ever did to help insure our success as a species), using fire to clear a field for planting is an invention, figuring ways to create fire, etc., but not fire itself.
Personally I would put cutting tools above string/rope; how do you make string without cutting tools to gather/prepare what you need to make the string?
Dave says:
September 15, 2013 at 5:30 am
Thanks, Dave. It was indeed careless phrasing. What it actually said was that these were the only two cannons that could be verified from British army records to have been at the battle of Waterloo.
w.
Go anywhere in the world and look at anything older than about 70 years made out of cast-iron and it may well have Made In Falkirk on it. I saw a big cooking pot – missionary size – in Botswana , (sans missionary)- made in Falkirk. They could make anything from a small kettle to a salt drying pan 10 foot diameter and quarter inch thick to great lumps of architectural iron. It was the universal material. Old cast iron band-stands all over the world have Made in Glasgow moulded on them.
Mike M:
I am replying to your post at September 15, 2013 at 7:11 am.
Firstly, I did not say “fire” is an invention. I said “use of fire” is the greatest invention.
Many would claim that agriculture is the second greatest invention.
But I claimed (and I stand by) string is the second greatest invention. I listed some of what it enables and indicated there are others (e.g. nets, fishing lines, etc.). But you suggest cutting tools were a greater invention than string. Perhaps. Then you ask me
Any fiber can be used to make string. Many plant and animal fibers can be gathered – not cut – to make string.
To this day people in the Andes collect grass which they fashion into thick string (i.e. ropes) from which they construct suspension bridges across gorges.
Indeed, knotted string made from grass was a form of writing in South America.
However, string would be cut if rubbed against sharp stones. The earliest known cutting tools are made from stone. It is possible (I say no more than possible) that the existence of string provided the invention of cutting tools.
Plumblines provide verticals, and knotted string provides right angles. So, string leads directly to masonry and mathematics. Thus string enables both practical and philosophical developments. Cutting tools don’t.
Richard
Well, you’re on a roll!
There should be an award for every ill-mannered clown that comes on here and asks why an article that isn’t about global warming has been included.
These posts are great.
John Robertson says:
September 14, 2013 at 11:37 pm
What? The interpretation of Archimedes’ Principle doesn’t count?
Here’s a thought experiment to demonstrate the correct answer regarding the relative weights of water + boats in each
bucketgondola.Put a canoe in a swimming pool with a canoeist and a bunch of large rocks (or to keep more in the character of this travel post — cannonballs). Have the canoeist paddle to the middle of the pool and drop the cannonballs out of the canoe and into the pool. Will the level of water in the pool rise, fall or remain the same? Why?
Do not actually attempt this at a local public swimming pool.
I assure any doubters the total weights of the two gondolas are always the same, as long as the water levels are equal. It does not matter if one is empty and the other holds a fully loaded cement barge. So long as a boat floats, it will displace an amount of water exactly equal to its total weight The displaced water is forced out of the gondola, thus removing a weight of water exactly equal to the weight of the boat.
The Falkirk wheel is an elegant application of this simple principle. And it’s beautiful as well.
(Kadaka: this observation is also credited to Archimedes, as your Wiki cite confirms, so I lump it together under the term “Archimedes’ Principle”. Maybe it’s more correct to call it the first corollary, but it is definitely part of the same fundamental insight).
WJohn says: September 15, 2013 at 7:43 am
————————————————-
Missionary size cooking pot. Now THAT’s funny!!
Mike M says: September 15, 2013 at 6:54 am
The total weights ARE the same.
—————————————————————-
Ha! My boss has a standard question he asks of engineers during the hiring interview: You have a swimming pool with a rowboat. Inside the rowboat there’s a guy with a big rock. What happens to the water level in the pool when the guy throws the rock overboard and it sinks to the bottom?
Points out the difference between displacement and buoyancy. And oldseadog, yes I missed the fact that the lower bucket drops into a dry sump. Elegant.
Dan
The grass is always greener…. In the UK we are often told that philanthropy and good works are more prevalent in the USA!
From Alan Watt, Climate Denialist Level 7 on September 15, 2013 at 9:00 am:
Plastic cereal bowl was floated on water in a larger stainless steel mixing bowl, considerable amount of pocket change was placed in cereal bowl, water level was topped off until level with mixing bowl edge.
Change was then dumped from cereal bowl into mixing bowl where it promptly fell to the bottom, cereal bowl was placed back on the water. Water level had dropped.
Why?
When the pocket change is resting on the bottom of the cereal bowl, its weight is supported by the water. Per Archimedes, water is displaced whose weight equals the change’s weight. When the pocket change is resting on the bottom of the bowl, the counter top is supporting its weight. Water does not have to be displaced to support its weight, thus the level has dropped.
For the wheel, as long as the vessels in the compartments are fully floating, on loading no vessel is allowed to make resting contact with its compartment, then the weights should be close enough to equal.
Note: Thought experiments are as computer models, you think science and logic are being used to show you what would be reality, but assumptions and misapplications can lead you astray. Check thought experiments against real experiments as needed.
Wonderful story as usual Willis. Just one small thing – the Falkirk Wheel was built in Ripley; that’s in England!
kadaka: “…then the weights should be close enough to equal.”
No, not ‘close enough’. If everything is floating and the water level is exactly the same then the sum of the weight of the water plus ANY amount of weight of something floating in it, (including zero), will be EXACTLY the same. (Dumping rocks out of a canoe has nothing to do with this because that ain’t happening here.)
“I’m so confused”…… love the journal Willis!
From Mike M on September 15, 2013 at 11:02 am:
I was wondering if anyone would be twitchy enough to jump on that. It arises in the transition from clean thought experiment to actual gritty reality.
Willis clearly wrote: “… if the water levels in the two chambers are different by more than 75 mm (3″), the whole thing stops.” Freely interpret as there can be up to a 75mm water level difference. When the relative water levels are not equal, the weights are not equal. And how often will you get relative water levels EXACTLY the same without an active level equalizing system?
But for the purposes of wheel operation, the weights should be close enough to equal.
BTW, “in theory” you can build a wheel large enough that the height difference yields water at the top with a significantly lower density, such as if top and bottom had the same relative level then top would be significantly lighter. This wheel is small enough that the difference in weights from that is infinitesimal, ignorable.
oldseadog what goes round comes round. If you ever plan a trip to Paris ask Anthony or the mods for my email. Looking forward to meeting you.