This blog posts about aviation, automobiles, electronics, programming, politics and such other subjects as catch my interest. The blog is based in northern New Hampshire, USA
Tuesday, June 15, 2010
Product Improvement, 1830's style
Down in Baltimore they have a railroad museum full of steam locomotives. It goes right back to the first steamer the B&O ever built, Tom Thumb. Walking around the museum you can see the machines evolving from the first experimental model to the humonguous machines built in the 1940's.
The first model, Tom Thumb, of the famous horse race, is an obvious design. Take a four wheel chassis and plunk a steam boiler down in the middle of it. Firebox on the bottom, fire tube boiler above the fire, and a stack, for draft, atop the boiler. Vertical cylinder driving the wheels thru gears. The number 2 and number 3 engines, dubbed "grasshoppers", are bigger and heavier versions of Tom Thumb. Design is moving forward, number 2 grasshopper still has the expensive-to-make gear drive. Number 3 grasshopper drops the gear and replaces it with cheaper and simpler drive rods.
Grasshopper design reached a dead end. The grasshoppers were not very big or very powerful and they could not be made larger. A larger vertical boiler would be taller and would not fit under the bridges. A look around the museum shows the stacks on all the locomotives rise to exactly the same height, namely the height of the lowest bridge on the mainline.
Follow on design, which lasted until the end of steam, was the horizontal boiler. Technical difficulty of horizontal boilers is how to get the heat of the fire to flow sideways thru the boiler. Heat rises as we all know, and sidewise is a long way from up. The solution was to put the stack at one end of the boiler and the fire at the other. The draft of the stack sucked the flames thru the firetubes of the boiler. The final trick was to vent the waste steam from the cylinders up the stack. As the steam rushed up the stack it created a strong draft that kept things burning merrily.
In the museum you can see all these design improvements coming on very rapidly. It took less than 20 years to go from Tom Thumb to the American standard locomotive design that stayed in service until the end of steam.
The first model, Tom Thumb, of the famous horse race, is an obvious design. Take a four wheel chassis and plunk a steam boiler down in the middle of it. Firebox on the bottom, fire tube boiler above the fire, and a stack, for draft, atop the boiler. Vertical cylinder driving the wheels thru gears. The number 2 and number 3 engines, dubbed "grasshoppers", are bigger and heavier versions of Tom Thumb. Design is moving forward, number 2 grasshopper still has the expensive-to-make gear drive. Number 3 grasshopper drops the gear and replaces it with cheaper and simpler drive rods.
Grasshopper design reached a dead end. The grasshoppers were not very big or very powerful and they could not be made larger. A larger vertical boiler would be taller and would not fit under the bridges. A look around the museum shows the stacks on all the locomotives rise to exactly the same height, namely the height of the lowest bridge on the mainline.
Follow on design, which lasted until the end of steam, was the horizontal boiler. Technical difficulty of horizontal boilers is how to get the heat of the fire to flow sideways thru the boiler. Heat rises as we all know, and sidewise is a long way from up. The solution was to put the stack at one end of the boiler and the fire at the other. The draft of the stack sucked the flames thru the firetubes of the boiler. The final trick was to vent the waste steam from the cylinders up the stack. As the steam rushed up the stack it created a strong draft that kept things burning merrily.
In the museum you can see all these design improvements coming on very rapidly. It took less than 20 years to go from Tom Thumb to the American standard locomotive design that stayed in service until the end of steam.
Monday, June 14, 2010
I wonder what they are slipping thru in Washington
While the news media are totally consumed by the BP oil spill?
Why I hate Windows.
Was out with the laptop doing an inventory. Bring the laptop home and try to back up the new data to the desktop. Plugged a criss-cross network cable between the two machines, expecting to be able to move files between them. This used to work, in fact it used to work with these two computers and this cable.
Well, it doesn't work any longer. I futzed around for an hour. Turned off the firewalls. Each machine could ping the other machine, but Windows file sharing would not work.
I finally burned the files into a $1 CD and moved them that way.
Damn Microsoft.
Well, it doesn't work any longer. I futzed around for an hour. Turned off the firewalls. Each machine could ping the other machine, but Windows file sharing would not work.
I finally burned the files into a $1 CD and moved them that way.
Damn Microsoft.
Friday, June 11, 2010
It takes money to make money
Or, it takes energy to get energy. This graph shows how much energy is required to make various energy sources work.
The red is the amount of energy consumed by drilling engines, explosives, refineries, pressure vessels, stills, etc. The blue is the amount of useful energy yielded by the process.
Notice the broad yellow arrow marked "ERoEI Required to sustain current Industrial Civilization." Notice also that favorite energy sources of the left and the right (bio mass, nuclear, tar sands, ethanol) are on the wrong side of that arrow.
Bottom line. We need conventional oil and gas unless we accept dropping back to a pre industrial standard of living.
Thursday, June 10, 2010
Wednesday, June 9, 2010
To bust or not to bust BP
President Obama is under pressure to "do something" about the BP oil spill. Problem is, objectively there is nothing he can do. The men, equipment, and expertise all belong to industry, not the government. The well will be capped as fast as BP can do it.
Groping around for something to do, Obama is threatening BP with criminal prosecution. Legally speaking this is possible. US law is riddled with loopholes, and aggressive prosecutors with plenty of budget can indict even a ham sandwich, let alone a multinational oil company with an accident prone record. Now, with pictures of oil sticky pelicans all over TV news, no American jury would have any trouble convicting.
According to the Wall St Journal, the only paper to cover the issue, the spill happened because of bad judgment calls by the BP manager aboard the rig, and failure of the blowout preventer. The BP man omitted or cut short two important tests for gas leakage. They cemented the well shut, assumed the cement job was tight. In actual fact, the cement job leaked, allowing natural gas at 3000 pounds/square inch into the 13000 foot long drill pipe. The only thing preventing this high pressure gas from rising up the well was the weight of 13000 feet of heavy drilling mud in the pipe. BP pumped that out and refilled the well with sea water. The natural gas forced its way up to the surface, caught fire and exploded. BP tried to shut the well off with the blowout preventer but that gadget malfunctioned. This is dumb and dumber, possibly rising to the level of negligence, but not criminal in the ordinary sense of the word.
Plus, we are depending upon BP to cap this runaway well. Somehow I don't think the threat of indictment, trial, and punishment is going to make BP work any faster or harder. In fact it will slow them down. BP is lawyering up, and lawyers always slow things down.
Obama would do better to call the BP people and offer them help. Navy submarines, Air Force transports, Army helicopters, could help, and won't hurt, and the support would help the morale of the BP personnel struggling with heavy equipment in 5000 feet of water.
And, to prevent this from happening again, there ought to be a clearly written set of safety regulations covering leak testing, fire fighting equipment, chain of command aboard the drill rig, life boat drills, fire drills, and testing of blow out preventers. I don't think such a book exists right now and it ought to.
Groping around for something to do, Obama is threatening BP with criminal prosecution. Legally speaking this is possible. US law is riddled with loopholes, and aggressive prosecutors with plenty of budget can indict even a ham sandwich, let alone a multinational oil company with an accident prone record. Now, with pictures of oil sticky pelicans all over TV news, no American jury would have any trouble convicting.
According to the Wall St Journal, the only paper to cover the issue, the spill happened because of bad judgment calls by the BP manager aboard the rig, and failure of the blowout preventer. The BP man omitted or cut short two important tests for gas leakage. They cemented the well shut, assumed the cement job was tight. In actual fact, the cement job leaked, allowing natural gas at 3000 pounds/square inch into the 13000 foot long drill pipe. The only thing preventing this high pressure gas from rising up the well was the weight of 13000 feet of heavy drilling mud in the pipe. BP pumped that out and refilled the well with sea water. The natural gas forced its way up to the surface, caught fire and exploded. BP tried to shut the well off with the blowout preventer but that gadget malfunctioned. This is dumb and dumber, possibly rising to the level of negligence, but not criminal in the ordinary sense of the word.
Plus, we are depending upon BP to cap this runaway well. Somehow I don't think the threat of indictment, trial, and punishment is going to make BP work any faster or harder. In fact it will slow them down. BP is lawyering up, and lawyers always slow things down.
Obama would do better to call the BP people and offer them help. Navy submarines, Air Force transports, Army helicopters, could help, and won't hurt, and the support would help the morale of the BP personnel struggling with heavy equipment in 5000 feet of water.
And, to prevent this from happening again, there ought to be a clearly written set of safety regulations covering leak testing, fire fighting equipment, chain of command aboard the drill rig, life boat drills, fire drills, and testing of blow out preventers. I don't think such a book exists right now and it ought to.
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