RugerFirearms
Published on 16 Dec 2009The “History of the Gun” online video series produced by Ruger is a unique look at the progression of firearms technology throughout the years, hosted by Senior Editor of Guns & Ammo Garry James. Part 3 examines the Wheellock.
December 1, 2017
History of the Gun – Part 3: The Wheellock
Comments Off on History of the Gun – Part 3: The Wheellock
November 30, 2017
Bitcoin
Charles Stross explains why he’s not a fan of Bitcoin (and I do agree with him that the hard limit to the total number of Bitcoins sounded like a bad idea to me the first time I ever heard of them):
So: me and bitcoin, you already knew I disliked it, right?
(Let’s discriminate between Blockchain and Bitcoin for a moment. Blockchain: a cryptographically secured distributed database, useful for numerous purposes. Bitcoin: a particularly pernicious cryptocurrency implemented using blockchain.) What makes Bitcoin (hereafter BTC) pernicious in the first instance is the mining process, in combination with the hard upper limit on the number of BTC: it becomes increasingly computationally expensive over time. Per this article, Bitcoin mining is now consuming 30.23 TWh of electricity per year, or rather more electricity than Ireland; it’s outrageously more energy-intensive than the Visa or Mastercard networks, all in the name of delivering a decentralized currency rather than one with individual choke-points. (Here’s a semi-log plot of relative mining difficulty over time.)
Bitcoin relative mining difficulty chart with logarithmic vertical scale. Relative difficulty defined as 1 at 9 January 2009. Higher number means higher difficulty. Horizontal range is from 9 January 2009 to 8 November 2014.
Source: Wikipedia.Credit card and banking settlement is vulnerable to government pressure, so it’s no surprise that BTC is a libertarian shibboleth. (Per a demographic survey of BTC users compiled by a UCL researcher and no longer on the web, the typical BTC user in 2013 was a 32 year old male libertarian.)
Times change, and so, I think, do the people behind the ongoing BTC commodity bubble. (Which is still inflating because around 30% of BTC remain to be mined, so conditions of artificial scarcity and a commodity bubble coincide). Last night I tweeted an intemperate opinion—that’s about all twitter is good for, plus the odd bon mot and cat jpeg—that we need to ban Bitcoin because it’s fucking our carbon emissions. It’s up to 0.12% of global energy consumption and rising rapidly: the implication is that it has the potential to outstrip more useful and productive computational uses of energy (like, oh, kitten jpegs) and to rival other major power-hogging industries without providing anything we actually need. And boy did I get some interesting random replies!
Comments Off on Bitcoin
History of the Gun – Part 2: The Matchlock
RugerFirearms
Published on 10 Dec 2009The “History of the Gun” online video series produced by Ruger is a unique look at the progression of firearms technology throughout the years, hosted by Senior Editor of Guns & Ammo Garry James. Part 2 examines the Matchlock.
Comments Off on History of the Gun – Part 2: The Matchlock
November 29, 2017
Self-driving cars
Michael Walsh isn’t a fan of self-driving cars, no sirree:
A “self-driving” car is an oxymoron, in the same way that “paying for a tax cut” is. Someone or something is going to be driving that car, and the whole point here is that it ain’t going to be you, brother.
For while you may at first think you are directing the destination of the vehicle, the fact is you’re a passenger in a computer-controlled mobile living-room whose every move is dictated by Big Brother, whether directly or remotely. It’s bad enough now, when the computers in your car can rat you out to highway checkpoints, and your Bluetooth-connected cell phone broadcasts your whereabouts to every law enforcement officer in the county.
But once the “self-driving” car juts its snout into the marketplace, and tries to drive out the you-driving cars, whom do you think is going to be calling the shots? In quick succession, say hello to the road-mileage tax and ever more vehicles on the roads, given that no one will have to qualify for a vision-tested or skills-tested drivers’ licenses anymore.
Be also prepared for restrictions on where and when you can be chauffeured around in robot-propelled comfort; which kinds of gasoline you may purchase, and when; and with whom you may someday be forced to share your vehicle as the cars are pre-programmed at the factory to respond to commands from elsewhere, including checking IDs. We used to want God to be our co-pilot; instead, we’re going to get Google.
So buy that car you’ve been fancying — you know, the one with a functioning steering wheel, accelerator, and brakes; the one that goes where you want it to, more or less — while you still can, because an unholy alliance of national-security TSA types, social justice warriors, and tech nerds are bound and determined to take it away from you. We can’t have folks mucking about inside of Fortress America, free to go when and where they please, without so much as a by-your-leave. From King of the Road to a sack of spuds, suitable for carting, in just a few postwar generations: welcome to the world of the Emasculated American Male.
H/T to Small Dead Animals for the link.
Comments Off on Self-driving cars
History of the Gun – Part 1: The Hand Cannon
RugerFirearms
Published on 10 Dec 2009The “History of the Gun” online video series produced by Ruger is a unique look at the progression of firearms technology throughout the years, hosted by Senior Editor of Guns & Ammo Garry James. Part 1 examines the Hand Cannon.
Comments Off on History of the Gun – Part 1: The Hand Cannon
November 26, 2017
Fire-arrows!
Lindybeige
Published on 10 Jun 2016Fire-arrows – did archers really use them in battles? We see them in the movies, so presumably not.
This is the most-anticipated video of all for this channel, which naturally makes me a bit nervous. Will people be hideously disappointed? I mentioned two and a half years ago that I would make a video on this topic, and this video shows that I am as good as my word, and not over-hasty either.
My thanks to the three people who pointed out quite correctly that when I said ‘Francis Bacon’ (1561-1626) I meant Roger Bacon (1219-1292).
Comments Off on Fire-arrows!
November 25, 2017
Cambrai Tank Chats Special: The Mark IV Tank
Tank Museum
Published on 24 Nov 2017The Mark IV tank was the most numerous of the First World War and went in to battle en masse at the Battle of Cambrai, 20 November 1917. In this special edition of Tank Chats, Curator David Willey explains how the Mark IV tank functions and how it was used to break through the World War One German defences.
Comments Off on Cambrai Tank Chats Special: The Mark IV Tank
November 24, 2017
Tank Corps Unleashed – The Battle of Cambrai I THE GREAT WAR Week 174
The Great War
Published on 23 Nov 2017After stopping the offensive at Passchendaele, the British Army launches another, albeit more limited, offensive. Almost 500 tanks are put into place and the initial success is remarkable. But the Germans had been training in anti-tank warfare and are supported by fresh troops from the Eastern Front.
Comments Off on Tank Corps Unleashed – The Battle of Cambrai I THE GREAT WAR Week 174
November 23, 2017
Transport regression
ESR linked to this article, saying “This is hands-down the most interesting article on history of technology I’ve read in a very long time. It seems the Middle East, the cradle of the wheeled cart, completely gave up on wheeled transport for 1500 years – it was displaced by, of all things, camels. Among other things, this explains the mazelike layout of old Arab cities – they’re like that because they’re optimized for walking and animal-riding, not wheeled transport.”:
When the first motor car chugged defiantly off the road and into the desert an entire epoch in world history began to pass away, the epoch of the camel. After centuries of supremacy as a transport animal, centuries that had seen it become for millions of people the romantic symbol of the entire Middle East, the stalwart camel was at last facing unbeatable competition.
Yet once before this homely drama of competition between the camel and the wheel had been played out in nearly identical fashion, only in reverse. Once, in ancient times, the Middle East teemed with carts and wagons and chariots, but they were totally driven out by the coming of the camel.
For all the discussion there has been among archeologists about why advanced societies such as those in pre-Colombian Central and South America never invented wheeled transport, there has been little notice taken of the amazing fact that Middle Eastern society wilfully abandoned the use of the wheel, one of mankind’s greatest inventions.
It did not, of course, abandon the wheel in all of its many forms. The potter’s wheel remained, and so did the huge, picturesque norias, or waterwheels of Syria. But gradually over the course of the first four or five centuries of the Christian era, and perhaps even earlier, all wheeled transport in the area, from the grandest chariot to the humblest farm wagon, passed out of existence.
As late as the 1780’s the French traveler Volney could still note, “It is remarkable that in all of Syria one does not see a single cart or wagon.” Moreover, in the Arabic and Persian languages one is hard pressed to find any vocabulary proper to either the use or construction of carts and wagons.
The most common explanation of this phenomenon is lack of, or deterioration of, roads in the Middle East, and to be sure the old Royal Road of the Persians and the whole network of Roman roads at some time fell out of repair and then passed out of use. However, roads are built for wheels and not vice versa. Their decline paralleled that of the wheel; it did not cause it.
Comments Off on Transport regression
November 22, 2017
A damned odd canary in this particular coal mine
Megan McArdle on the imminent demise of the FCC’s “Net Neutrality”:
The internet will be filled today with denunciations of this move, threats of a dark future in which our access to content will be controlled by a few powerful companies. And sure, that may happen. But in fact, it may already have happened, led not by ISPs, but by the very companies that were fighting so hard for net neutrality.
Consider what happened to the Daily Stormer, the neo-Nazi publication, after Charlottesville. One by one, hosting companies refused to permit its content on their servers. The group was forced to effectively flee the country, and then other countries, too, shut it down.
Now of course, these are not nice people. Their website espoused vile hate. But the fact remains that what they were publishing was not illegal, merely immoral, and their immoral speech was effectively shut down by a small number of private companies who decided to exercise their considerable control over what we’re allowed to read. And what is to stop them from expanding this decision to other categories, forcing the rest of us to conform to Silicon Valley’s idea of what it is moral and right for us to see?
Fifteen years ago, when I started blogging, it was common to hear that “the internet interprets censorship as damage and routes around it.” You don’t hear that so often anymore, because it’s not true. China has proven very effective at censoring the internet, and as market power has consolidated in the tech industry, so have private firms.
Meanwhile, our experience of the internet is increasingly controlled by a handful of firms, most especially Google and Facebook. The argument for regulating these companies as public utilities is arguably at least as strong as the argument for thus regulating ISPs, and very possibly much stronger; while cable monopolies may have local dominance, none of them has the ability that Google and Facebook have to unilaterally shape what Americans see, hear, and read.
In other words, we already live in the walled garden that activists worry about, and the walls are getting higher every day. Is this a problem? I think it is. But that doesn’t mean that the internet would get better if Google and Facebook and Apple and Amazon were required to make every decision with a regulator hanging over their shoulder to decide whether it was sufficiently “neutral.”
Comments Off on A damned odd canary in this particular coal mine
November 19, 2017
Development of British Tank Tactics 1917 I THE GREAT WAR Special
The Great War
Published on 18 Nov 2017The Battle of Cambrai 100 years ago was one of the pivotal moments for the British Tank Corps and tank combat in general. For the first time, the tanks were deployed in a way that they could play to their strengths.
Comments Off on Development of British Tank Tactics 1917 I THE GREAT WAR Special
Unique Ross Experimental A2 Pistol Prototype
Forgotten Weapons
Published on 13 Mar 2017This is a very rare Ross automatic pistol, patented in 1903 by Charles Ross, of the Ross Rifle Company in Quebec. It is a short recoil, toggle locked design, made for the .45 Ross proprietary cartridge (although efforts were made, unsuccessfully, to make a .45 ACP version for the US 1907 pistol trials).
Comments Off on Unique Ross Experimental A2 Pistol Prototype
November 18, 2017
The two biggest problems holding back widespread adoption of electric cars
Warren Meyer explains why the current crop of electric vehicles are still only niche players, despite lots of overblown media hype and over-generous government subsidies:
There are two problems with electric vehicles. Neither are unsolvable in the long-term, but neither are probably going to get solved in the next 5 years.
- Energy Density. 15 gallons of gasoline weighs 90 pounds and takes up 2 cubic feet. This will carry a 40 mpg car 600 miles. The Tesla Model S 85kwh battery pack weighs 1200 pounds and will carry the car 265 miles (from this article the cells themselves occupy about 4 cubic feet if packed perfectly but in this video the whole pack looks much larger). We can see that even with what Musk claims is twice the energy density of other batteries, the Tesla gets 0.22 miles per pound of fuel/battery while the regular car can get 6.7. That is a difference in energy density of 30x. Some of this is compensated for by heavy and bulky things the electric car does not need (e.g. coolant system) but it is still a major problem in car design.
- Charge Time. In my mind this is perhaps the single barrier that could, if solved, make electric cars ubiquitous. people complain about electric car range, but really EV range is not that much shorter than the range of traditional cars on a tank of gas. The problem is that it is MUCH faster to refill a tank of gas than it is to refill a battery with a full charge. Traditionally it takes all night to charge an electric car, but 2 minutes at the pump to “charge” a gasoline engine. The fastest current charging claim is Tesla’s, which claims that the supercharger sites they have built on many US interstate routes sites will charge 170 miles of range in 30 minutes, or 5.7 miles per minute. A traditional car (the same one used in point 1) can add 600 miles of range in 2 minutes, or 300 miles per minute, or 52 times faster than the electric car. This is the real reason EV range is an issue for folks.
Comments Off on The two biggest problems holding back widespread adoption of electric cars
The Best Way to Set Up a Bandsaw!
The Wood Whisperer
Published on 6 Jul 2017Back in 2007, I posted a video on Bandsaw Setup. The method I demonstrated was one I learned from other woodworkers as well as numerous books and manuals. While the method works perfectly, it overcomplicates things and employs a couple of unnecessary steps, namely achieving coplanarity of the wheels and eliminating drift. Four years later, I became aware of a video from The Woodworking Shows featuring Alex Snodgrass and his simpler (and nearly foolproof) method for bandsaw tuneup. I have since become friendly with Alex and asked him if he’d be willing to come out to my shop to film his setup method. He agreed and here we are! I can say without a doubt that this is the BEST way to set up a bandsaw.
Align the Blade
Install the blade and apply just enough tension to keep the blade securely on the wheels. Use the tracking adjustment while turning the wheel by hand to line up the deepest part of the gullet with the center of the top wheel.
Tension the Blade
You can usually ignore the tenon meter on most bandsaws as they are notoriously inaccurate. Instead, tension the blade until your finger is only able to deflect the blade by about 1/4″. This test should be done at the back of the saw where nothing can get in the way of the blade. The amount of pressure you apply to the blade shouldn’t result in turning your finger white. If that happens, you’re pushing too hard. After the tension is set, make sure the blade is still tracking properly with the gullet in the center of the top wheel.
Side Guides (Front to Back)
The front of the side guides should be located about 1/16″ back from the deepest part of the blade gullets. You don’t want the side guides to contact the cutting teeth of the blade since the teeth flare out at a slight angle. This adjustment is made to both the top and bottom guides.
Thrust Bearings
Adjust the thrust bearings carefully so that they do NOT rotate while the blade moves, but they DO begin to rotate as soon as light pressure is applied to the blade. Spend the necessary time to get this adjustment just right. Of course, you’ll do this adjustment to both the top and bottom guides.
Side Guides (Side to Side)
Just like the thrust bearing adjustment, the side guides should be as close to the blade as possible without actually touching. So when the blade moves the bearings should be stationary. When a slight amount of pressure is applied to the blade as its moving, the bearings should spin.
Square the Table
Using a 2×4 or 2×6, make a partial cut into the face of the board. Turn the saw off, flip the board around and try to get the blade to slide into the cut slot. If it slides in easily and without resistance, we know the table is 90 degrees to the blade. If it doesn’t slide in, make adjustments to the table and cut/test again. The wider the board is, the more accurate this test will be.
Align the Fence
The fence can be aligned parallel with the body of the blade using nothing more than a ruler. Be sure the ruler is resting on the body of the blade between the teeth. With a long enough ruler you can easily align the fence by eye. Alex shows us the F.A.S.T system which is a simple and convenient way to do this same task.
Test Cut
Since the overall goal of this setup process is to prepare for resawing, a good test is to slice off a thin veneer from a jointed and planed board. In our first test cut we were able to slice off a piece that was .016″ or just over 1/64″. This is way thinner than anything I’d ever need but it’s pretty cool to see that the saw is capable of making such a delicate cut.
Special thanks to Alex Snodgrass and Carter Products for helping make this video possible. Happy bandsawing!
Comments Off on The Best Way to Set Up a Bandsaw!
November 15, 2017
The Man Whose Tank Collection Got WAY Out Of Hand | Forces TV
Forces TV
Published on 29 Oct 2017We take a trip to Cobbaton Combat Collection to meet the family with over 70 military vehicles!
Comments Off on The Man Whose Tank Collection Got WAY Out Of Hand | Forces TV
