jaydeehess
Penultimate Amazing
You have no insight to offer then, is that it?
The Titanic had a cruising speed of 21 knots, whereas clipper ships could only manage around 17 knots. However they didn't have to give up cargo space for fuel - a distinct advantage on longer voyages. In the early days of steam, sail was still very competitive.at some point, for a typical cargo ship, the cost of the wood fuel and the cargo space taken up (including the space taken up by the engines, and the needed fresh water supply) would no longer be worth the increased average speed relative to sail.
On his first voyage in command, the ship sailed from England to Sydney in 77 days, and returned to the UK from Australia in 73 days. This was the start of ten years domination by Cutty Sark in the wool trade. The ship soon established herself as the fastest vessel, the ‘last chance’ ship to make the English January wool sales.
In July 1889, Cutty Sark was involved in a famous incident with the crack P&O steam ship Britannia. On the night of 25 July, Britannia, doing between 14.5 and 16 knots, was overhauled by Cutty Sark doing a good 17 knots. Robert Olivey, Second Officer on Britannia, watched the lights of the sailing ship overhauling his vessel with amazement and called Captain Hector. Neither could have known it was Cutty Sark, and Britannia’s log read with great amazement, 'Sailing ship overhauled and passed us!'
Yes, it's a pity that we weren't forced to deal with the problem back then. Now we face a much larger problem, because rather than just having to replant trees and wait 30 years for them to mature, we have to find a replacement for fossil fuels which took millions of years to form. If only we hadn't switched to fossil fuels, we might have figured out how to become sustainable and not have such a mess to clean up.Red Baron Farms said:deforestation... was nearly complete and only halted just barely by the switch to fossil fuels
Leonardo's problem wasn't technological. The first step in creating any new technology is discovering that it can be done, then you figure out how to do it. Leonardo cracked the first bit, but no one was willing to take the next step. Why? 'Necessity is the Mother of Invention'. In a civilization which is getting along just fine without infernal flying machines, why would you want them?Leonardo da Vinci didn't fail to make a flying machine because flying is impossible, but because the jump in technology he was trying to make was just too big.
Fossil fuels certainly have accelerated technological 'progress' but eventually we will have to pay the piper. Our current model of economic growth and increasing affluence is top heavy and unsustainable, so the question is will our 'advanced' fossil fueled technology be able to avert disaster, or will it be the cause?
We talk about how fossil fuels have given 'us' advanced technology such as cars and computers, but 80% of the World's population earn less than $10 a day. How much benefit do you think they are getting out of it? With the way we are going, there's a good chance that the benefits of any tech which has trickled down to them will be negated by the effects of global warming and resource depletion. I bet that in the future a lot of people will be cursing us for our shortsightedness.
I'm not sure this is on topic.
The Titanic had a cruising speed of 21 knots, whereas clipper ships could only manage around 17 knots. However they didn't have to give up cargo space for fuel - a distinct advantage on longer voyages. In the early days of steam, sail was still very competitive.
National Maritime Museum: History of Cutty Sark
1. 80% of the World's population can't afford the 'level of technology' we have reached with fossil fuels. To them it makes no difference, and they might even be better off without it.I'm not sure this is on topic.
OK, let's game it out. Let's try to launch a Titanic-like ship powered by 10,000 tons of wood. That's about 6000 cords of wood. Well-managed coppices can produce 2 cords/acre/year, so a one-way voyage requires a 3000 acre harvest. Titanic-class ships appear to have aimed for 10 voyages/year, so let's say White Star Line needs to own 30,000 acres of coppice land in the US and 30,000 acres in the UK. For that, it'll complete 48,000 passenger-crossings of the Atlantic. Not too bad: 1.25 acres of timber, held for a year, will produce 2.5 cords of wood and will move 1 passenger across the Atlantic in one direction, under wood-fired steam power, at 1914-level efficiency.
So, the question is: what does it cost to hold 1.25 acres of timberland for a year?
I clicked through to
http://www.wredcoland.com/PropertyList/Feature/Timberland
and see big timber lots selling for $1500/acre. To hold a $1500 mortgage costs about $75/year, so a one-way-trip's worth of wood requires a $93 mortgage payment on timberland.
Let's do it another way. A cord of wood today costs $50-$100 or so, which obviously includes BOTH land-rent AND harvesting and drying/splitting costs. So, our one-way trip, requiring 2.5 cords of wood, costs $125-250. Same order of magnitude as the timberland calculation.
1. 80% of the World's population can't afford the 'level of technology' we have reached with fossil fuels. To them it makes no difference, and they might even be better off without it.
what, instead of water pumping for coal mining, would the first major use of stationary steam engines have been?
One easy answer is other kinds of mining, but I could make a case for a different use: water pumping for canals for transport.
In other words, as already noted, those canals only existed because of coal. You may argue that they also stimulated increased settlement, agriculture, and so on. But like steam powered locomotion, those are again things that merely tagged along after the fact. They are factors that have always existed, but were never enough to actually drive the development of steam power or an equivalent to modern canal systems. It's easy to look back at things that were possible because of a particular innovation and say that if things were different they might have been the driving force behind it. But the fact is that they weren't, and without an argument to say how likely it is that they actually might have become such, the mere fact that it's not actually impossible doesn't make in at all probable.The modern canal system was mainly a product of the 18th century and early 19th century. It came into being because the Industrial Revolution (which began in Britain during the mid-18th century) demanded an economic and reliable way to transport goods and commodities in large quantities.
Titanic-class ships appear to have aimed for 10 voyages/year, so let's say White Star Line needs to own 30,000 acres of coppice land in the US and 30,000 acres in the UK.
what, instead of water pumping for coal mining, would the first major use of stationary steam engines have been?
One easy answer is other kinds of mining,
well your though Experiment world would spare us the biggest Problem humanity ever faced. so it is somehwat on Topic![]()
1. 80% of the World's population can't afford the 'level of technology' we have reached with fossil fuels. To them it makes no difference, and they might even be better off without it.
2. Right now it looks like we are painting ourselves into a corner. Without fossil fuels the pace of technological progress might have been slower, but more sustainable and perhaps reaching a higher level in the long term.
3. Just how do we measure the World's 'level' of technology? It has been suggested that without fossil fuels advanced tech would not get past the 'curiosity' stage, and most people would live a very low-tech existence. But that's the situation for 80% of the World's population now.
It's not enough to say that people could have developed all kinds of alternatives to modern technology, you need to have a good reason for that development to have actually taken place. So far most of the reasons given pretty much boil down to "obviously the end goal is something approximating modern technology, so people would have done whatever it takes to get there". That's not how technology works.
It's not enough to say that people could have developed all kinds of alternatives to modern technology, you need to have a good reason for that development to have actually taken place. So far most of the reasons given pretty much boil down to "obviously the end goal is something approximating modern technology, so people would have done whatever it takes to get there". That's not how technology works. We don't have an end goal for how civilisation should look a couple of centuries down the line, we try to come up with things that will be useful right now, or at least in the near future. The industrial revolution was not inevitable. If coal didn't exist, people wouldn't have just said "Screw it, let's have a solar powered industrial revolution instead", they'd have just not had one at all.
Alright, though I think near-total deforestation would have been pretty bad, too.
And how do we determine how advanced a technology is anyway? Is a Kindle more advanced than a conventional book just because it has a few billion transistors in it, or because it can do more? What if we had e-books first, and then someone invented a cheaper device that didn't need power or an internet connection, featured super high resolution photographic color graphics and instant random page access, could be 'printed' in practically any size, and was made out of fully recyclable wood fibers? Would this new 'paper' book be a higher or lower tech?
In 'our world' those might be fair prices, but in 'wood world', where wood is precious, I imagine those woodlands would fetch premium prices.
The Concorde is a good point---it is possible for a luxury technology to be too costly to succeed, even for the rich. However, I think my wood-lot-acre calculations suggest that transatlantic steam travel is easily within the ballpark of doable. The "underlying" costs of fuel (i.e. the cost of wood today, say $100/cord) is dirt cheap. And then ... well then we have to add the (unknown) outcome of the scarce-wood bidding war. Honestly, I find it hard to imagine that it adds a factor of 4---if the cost of wood goes up to $400/cord, a lot of the obvious buyers (poor people needing basic heat/electricity/wood-powered land transit) are going to skimp really hard or do without. Add another factor of 2 because a wood-Titanic is less efficient than a coal-Titanic (as Capeldodger points out, it needs more bunker volume). So, with all of that put together, the wood-Titanic is crossing the Atlantic with a $800-per-passenger fuel bill.
At which point we can refer to Wiki:
In other words, as already noted, those canals only existed because of coal. You may argue that they also stimulated increased settlement, agriculture, and so on. But like steam powered locomotion, those are again things that merely tagged along after the fact. They are factors that have always existed, but were never enough to actually drive the development of steam power or an equivalent to modern canal systems. It's easy to look back at things that were possible because of a particular innovation and say that if things were different they might have been the driving force behind it. But the fact is that they weren't, and without an argument to say how likely it is that they actually might have become such, the mere fact that it's not actually impossible doesn't make in at all probable.