Category Archives: Technology

Can’t stop the signal with crypto hashes

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Following the lead of Robb and Barron I’m hosting the files to produce firearms on a 3-D printer.

One of the risks to “the signal that cannot be stopped” is that the signal could be subtly corrupted without the possessor knowing. Therefore I am computing and including the hashes of the files so that you can verify it has not been corrupted. Of course someone could corrupt the hashes posted on this blog post to match the corrupted files but I have saved copies of the hashes in a secure location for later comparison. Contact me if there is a concern the hashes have been tampered.

To compute and verify the hashes I used File Checksum Tools (free and quite functional).

The Defense Distributed file pack is here (removed upon the advice of My Lawyer). Hashes:

  • MD5: F4784E3C4C6B6D851C3F2CFD8579B2A6
  • SHA-1: 3B733B62D8D3B08DE9BFFB94CDD308C18BF09BB0
  • SHA-256: 8B3247FE5145E87ABA5B91A6DFCA26193E5472C60AF279223CE5A92611A24D31

The Liberator is here (removed upon the advice of My Lawyer). Hashes:

  • MD5: 26DE1E830AC58C078650B69C4D34602E
  • SHA-1: AA33BC73264B80B87D21FF8D56DE02EAECDA3574
  • SHA-256: 763927D34CE89B550A118E3522181FC434632D6D6188CB82E1612096A613C4AA

Stuff I didn’t know

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Double action, pre Civil War design percussion revolver. It has a fully enclosed cylinder, i.e. a top strap. What I don’t get at the moment is why there are twice as many cylinder notches as there are chambers.

This is the sort of thing I’d like to own, and yet I can give no practical reason for it whatsoever.

ETA; I think I figured out the cylinder notch thing. It must be a safety system. Colt’s, Remington and others had similar features, pins or notches in the back of the cylinder to engage the hammer, that more or less locked the cylinder half way between chambers, so the hammer could rest safely between chambers, allowing the carrier to have all chambers loaded rather than resting the hammer on an empty chamber. This revolver is simply using the existing bolt (cylinder lock) for that purpose, methinks, hence the “in between” cylinder notches.

Quote of the day—Matt Brian

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Google users have blasted the company for focusing on its April Fools antics, arguing that the time invested in polishing its gags might have been better spent keeping Google Reader alive.

Matt Brian
April 1, 2013
Google and Microsoft trade insults for April Fools
[Add me to the list of Google Reader users that is annoyed they are discontinuing it.—Joe]

More on communication

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When I was a boy, out working the fields alone on my grandparents’ farm, I heard voices wafting in from the distance. Two men were standing next to a tractor, its engine running, and so they were shouting at each other to be heard over the engine noise. Two to three hundred yards away, I could hear nearly every word they were saying.

“Ah Hah! Unlike addition and multiplication, communication over a noise source can be asymetrical, or one way.” YOU may be able to hear ME just fine, but it may be utterly impossible for me you hear you, or vice versa. I knew that there was no possible way I could ever shout loud enough for those two men near the tractor to hear me, though I could hear them pretty well.

I’ve used this as an example on several occasions, trying to explain this as the reason why the frustrated fool on the other end of the conversation cannot get through to me. My wife, for example, has never understood this, and she will get angry when I tell her I can’t understand her as I’m washing my hands at the sink. SHE thinks I’M the dumb one, see.

Same goes for radio communication, when someone hears you booming in on a 100 watt repeater, but can’t understand why he isn’t being heard from his 3 watt handy-talkie (then he shouts into the microphone, which makes it worse, because his over modulation [FM} spreads out his three watts over more bandwidth, out toward the edges of the receive passband).

Then there are those who, when wearing ear muffs or headphones and you’re not, and you’re standing right next to them, will shout at you.

And we won’t even get in to the subject of those “low talkers” – those who will talk under their breath apparently as a means of irritating you or for some bizzare reason they want to use it as a means of feeling superior to you, because you’re struggling to hear them while they can hear you perfectly well, and so what’s wrong with you, Chump?

Cast bullets for an auto pistol

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Down the rabbit hole into the esoteric. Before the current ammo shortage I decided to start casting bullets, just because I liked the idea of an extra level of independence. The 30-30 cast bullets worked OK but there’s more to do there. This time though its the 10 mm Auto.

I’ve been loading the Hornady 180 XTPs with good results, but I wanted a 200 grain cast bullet too. The RCBS 200 SWC has gotten good reviews so I got that two cavity mold a while back. The mold handles I use for the Lyman molds didn’t fit the new RCBS mold, and people were starting to run low on things. Buffalo Arms in Idaho sells a hand-fabricated-looking handle set that works like a pair of Vice-Grips. Pretty expensive and heavy, but they had them in stock. They’re great. You get VERY consistent closing pressure for each pour. I weighed 20 already lubed bullets tonight and the extreme spread was 1.5 grains, 201 gr +/- .75.

Of course, to “save money” casting bullets from one dollar per pound lead, I had to buy a lube sizer. Seating the lead bullets, I was shaving lead on the case mouths, so I bought a 10 mm M die. It expands deeper into the case than a regular expander die, plus it makes a wider spot at the mouth. I’d been seating crimping in one swipe with the jacketed bullets, but since that’s not really an option for cast, I had to readjust my otherwise permanently adjusted seating die. Now I figure I’ll buy another seat die in this “money saving” venture.

To prevent the case mouth shaving lead from the bullet upon seating, I had to put LOTS more flair on the cases. I tried chamfering the mouths a little and that didn’t help much, so now I’m working the brass a lot more, which means it will work harden sooner. The bullets aren’t getting shaved now, but the cases are so wide at the mouth that the seating die can’t be lowered nearly as much as normal or the crimp taper starts to erase that wide belling, shaving lead anyway. And that means that the seating stem is just a bit too short, so with the locking collar removed from the seating stem and the stem screwed in as far as it will go, I still have to screw the die body down to where it is narrowing the flair just a bit. That means there is no support on the case at all except at the very mouth. I noticed that if I nicely align the bullets on the case mouth by hand before seating, they now don’t get shaved. When the bullets shave, the lead that’s stuck in front of the case mouth interferes with head spacing. It’s not serious, but it is annoying.

Loading dies, at least for straight wall auto cases, are not made with cast bullets in mind. These are RCBS dies, but I doubt there’d be much difference. The whole paradigm is wrong. Since you apparently need much more flair at the mouth, and you’re shoving the case up into the die mouth-first, your die has to be too large to support any part of the case except for the very mouth, or else it will erase your mouth flair. Instead of going mouth-first into the seating die, the cases should be going head-first into a support die, and then up to a seating stem, with the bullet pre aligned before it touches the case. That way, much of the case, and all of the bullet’s drive bands, could be aligned prior to seating. It couldn’t be done “right”, in my opinion, any other way.

But we make it work, somehow, with what we have. There’s still more testing to do, but initially I got two groups of just under 5 inches at 20 yards standing unsupported. Lots more recoil than the 180 XTP loads, but my chrono got lost along a 20 mile stretch of highway in a snowstorm so no vel data. A third group was MUCH larger, so I quit. There was leading in the Lone Wolf barrel. That was before I eliminated the lead shaving at seating. We’ll see later whether the shaving verses not shaving makes any difference.

The load is 9.4 grains Blue Dot, CCI 300, OAL 1.255, #2 alloy, Super Molly lube that came with the Lyman sizer. Still don’t know if it’s a keeper, but I do know I can get off at least 10 decent shots. Whoopie, eh?

How to make a mortar

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I played with some metal working equipment last weekend after not touching anything for several decades. While mostly successful I “learned a lot” without any permanent damage to the item I was working on and without leaving any of my blood or body parts behind.

Then yesterday I was looking for something else and saw this video of how professionals do things these days:

Quote of the day—Béla Nagy, et al

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A combination of an exponential decrease in cost and an exponential increase in production would make Moore’s law and Wright’s law indistinguishable, as originally pointed out by Sahal. We show for the first time that these regularities are observed in data to such a degree that the performance of these two laws is nearly the same. Our results show that technological progress is forecastable, with the square root of the logarithmic error growing linearly with the forecasting horizon at a typical rate of 2.5% per year. These results have implications for theories of technological change, and assessments of candidate technologies and policies for climate change mitigation.

Béla Nagy
J. Doyne Farmer
Quan M. Bui
Jessika E. Trancik
2012
Statistical Basis for Predicting Technological Progress
[I have two observations.

One; This is awesome! A variation of Moore's Law applies to, apparently, all technology.

Two; It looks as if they had to make a tie in "climate change" to get National Science Foundation grant money. That's really messed up. Government grants should not exist. The politics of research should succeed or fail using the money of someone other than that taken by gunpoint via taxes.—Joe]

What we KNOW…. that isn’t true

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Mark Twain said: It ain’t what you don’t know that gets you into trouble. It’s what you know for sure that just ain’t so.” I’ve seen a lot of examples of this in my life, and heard of more. I’m sure you have too. In fact, in installment 002 of “The Stars Came Back” Helton points out that a lot of time the so-called experts have really BAD plans, and that you can’t tell what the outcome of a lot of projects will be based on the credentials of the people starting it.(He is specifically talking about climate science, in fact)

The Climate debate is no different. There is a LOT of garbage out there (and I say this a a teacher with a cert that includes “Earth Science;” I’m in the “CO2 is plant food” camp) Then, along comes something from out of the dry fields that takes on directly one of those “common knowledge, common sense” things directly, and says, “We were wrong. The solution we have been pushing for decades is CAUSING the problem!” It takes some good sized balls, and a dose of humility the size of a Hollywood celeb’s coke habit, to make an admission like that. More so to take that fact, and a much better DEMONSTRATED solution, on the road.

We all know over-grazing causes land to turn into deserts, right?

Maybe not. Maybe the solution to desertification is to put MORE beef in the fields, and on the grill. It’s a win-win-win-win, meaning the lefties will HATE it, and fight it tooth and nail. But the guy makes a good case.

More on phonetics

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As often happens, I was talking to a customer over a poor cellular connection today. We have to exchange a lot of data to complete an order. He’s spelling the name of his street.

“Wait; that’s A, T, T as in alpha tango tango?” I say to confirm.
“No, it’s hotel echo papa”
“Wow!” I said “I really got that wrong” and I’m thinking to myself, “Bam! We’re home free– this guy knows standard phonetics.” Without it, we’d have had a hell of a frustrating time.

So, Young Grasshopper; learn your Standard Phonetics.

I’m still amazed and disgusted that most cop shops have their own systems, which makes it more difficult because for one, they don’t always use words that all sound completely different from one another, and too, if you know Standard Phonetics, their retarded cop phonetics don’t sound familiar and it therefore takes longer to comunicate. Moron phonetics.

Learning the standard system is easy. There are only twenty six of them, and as it happens, each one starts with a different letter of the alphabet (fancy that) so it’s really easy. It’s an international system, and most pilots, military and ham operators already know it hands down. Whaterya waitin’ for?

Practice. For example, if I look to my left on my desk, I can read off in my mind, “Hotel Papa…Delta echo sierra kilo julliette echo tango.” Stuff like that. Road signs, what have you. This should be taught in school, except for the fact that kids should know it before they get to school.

On a similar note; use text on your phone when the signal is too poor to use the more bandwidth-hogging voice communication. If you have only one bar on the s-meter it still works like a charm whereas vioce communication is two steps below impossible. I explained that to my daughter a while back, and was surprized that she hadn’t thought of it. I’d though it would have been obvious even to a teen-aged school girl– a few dew drops of bits verses a tsunami/torrent of bits, you know.

Charge imbalance

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WP_000525_2Web2013

The contents of the cottage cheese container is Boomerite surrounding a cardboard tube containing glass frit around a copper bar. The bottom of the cardboard tube makes contact with the bottom of the cottage cheese container.

Take a guess which direction the bar will travel when the Boomerite detonates.

IMG_3965Web2013

If you guessed slightly up and to the right you would be correct. See the red circle in the picture above.

The backstory is that Ry was trying to make a piece of art. It was mostly a failure.

IMG_3979Corrected

Next time it will be a five gallon bucket instead of a three pound cottage cheese container. Oh, and we will be about 250 yards away so Ry won’t have to worry about it coming out of orbit on top of him.

IMG_3977Corrected

It’s linear but does it scale?

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Paraphrasing Ry as we discuss the fireball for Boomershoot 2013:

One pound explosives one gallon gasoline, no problem. 14 pounds explosives, 14 gallons gasoline no problem. The gasoline is damping the explosion and it’s not breaking any windows. It’s linear! So, 1000 pounds of explosives and 1000 gallons of gasoline should be fine. Right? What could go wrong?

As Barb L. said when Ry and I were leaving for Idaho, “I suspect that you and Ry together equal trouble, sort of like Ruth and me together equal trouble. And it is Superbowl weekend again.

Ry has a history with Superbowl weekend.

Kelvin-Helmholtz Waves

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Or KH waves, or a KH instability. It’s a result of two distinct layers in a fluid traveling at different velocities. You’ll see it in rivers and streams, between bands in the atmospheres of Jupiter and Saturn, in your coffee cup, etc. In this case it’s made visible by the bottom layer being cloud, interacting with a clear layer above. The wave pattern extends from one side of the photo to the other. I had to darken the image a lot to bring out the detail. Through my polarizing glasses the waves could be seen curling in on themselves more dramatically. For really good detail in sky photos you need a polarizer, and probably a UV filter too, but my little point-and-shoot isn’t set up for such things. These KH waves are over the Clearwater River canyon above Lewiston, Idaho, seen from the south end of Moscow on my way to work the other day.

Kelvin-HelmholtzWaves

It isn’t complicated

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We occasionally get someone who wants to submit an idea for a new product. They’ll want us to evaluate it in hopes that we will help manufacture and market it for them.

Here’s the deal. If it happens to be something we’re already thinking about, I most certainly do NOT want to even know what you have. You can figure out why.

Somehow there has come to be this strange attitude, or belief, that if you’re a “little guy” with scant resources, that you must tug on someone else’s coat tails and convince them to “give you a chance” otherwise you have no chance.

It doesn’t work that way, or rather it certainly doesn’t need to work that way. If you have a little gizmo you want to turn into money, start searching for companies that do machining, or injection mold building, or casting, or whatever type of manufacturing you need, contact them, get some quotes for a few hundred or a thousand units. There are small shops that do these things in practically every town larger than a mere whistle stop. Many of them will not want to talk to you about such small numbers, but some will. Keep at it. Register yourself a domain name, take some nice photos, build a simple web site and get a web host for it, place a cheap ad in Shotgun News or what have you, and BAM! You’re in business. Just like that. What’s stopping you?

It probably will not cost more than the annual or twice annual beer and cigarette expense for the average, unemployed trailer park dweller. The rest is leg-work– finding people who can provide the specific services you need, and so I think that if you’re not willing to give yourself a chance, why should someone else give you that chance? Hmm? You won’t go out on a limb for your idea, but you want me to go out on a limb for your idea?

Supremacy clause

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An email exchange with lawyer/lobbyist Mike B. (with minor corrections and additions):

Joe: How about putting this on the agenda?
Mike: Won’t work: See supremacy clause.
Joe: Isn’t that the equivalent of saying, “The Fed can’t do that: See 2nd Amendment.”?
Mike: The 2nd Amendment doesn’t have its own tanks. See: Grant v. Lee (1865).
Joe: Vyacheslav Molotov mixes my cocktails: See Finland v. Soviet Union (1939).

You should know that Molotov cocktails have a difficult time with modern tanks. The proper application of Boomerite, thermite, and steel bars into the treads may also be required.

Conversations with special forces trained in improvised anti-tank methods are also useful. I kept my notes from the late 1990s.

Why there is no cell service in Westlake tunnel

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It has always annoyed me that I don’t have cell service while waiting for the bus at Westlake Station (downtown Seattle). Many times the bus or I will be late and I need to tell someone I’m not going to be on time but I have to wait until the bus arrives and gets me out of the tunnel. Or I could leave the tunnel on my own and risk missing the bus and being even later.

Yes, it’s in a tunnel 80 (?) feet underground but I put in my own microcell in the middle of a field in Idaho something like 30 miles from the nearest cell tower and have good service for myself and my Boomershoot “customers” using AT&T. Why couldn’t the cell companies get service 80 feet?

Now I know the answer:

The reason you don’t have cell coverage in Westlake Station is because the Three Stooges refused to allow the carriers to ride on the radio system without paying substantial fees for the privilege. Verizon, T-Mobil, Sprint, et al gave a collective “Eff You” to the Stooges when they demanded the fees, and now the populace is denied cell coverage.

Governments don’t have customers to make happy. They have subjects.

Careful with the whole stats argument…thing

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 We like to toss out statistics that bolster the pro second amendment position.  That’s something of an oxymoron, really.  I’ve done my share of it, certainly.

For example, there is the decline in our murder rate as gun ownership has gone up.  That’s nice and all, but I heard the other night that if our medical and response training and technology were that of the 1960s, our murder rate would be three times what it is today.  A person must actually die, you see, before it’s actually murder.  I haven’t looked it up (that’s your job – I’m not your servant) but it certainly sounded plausible.  If it’s true, then it means that there is in fact much more violence, but that yet more lives are being saved.  Gun owners couldn’t very well take credit for that.

I’ve been harping on this stats issue, and probably pissing off some people.  It may seem like a subtle point to some, but if so it is a subtle point of crucial importance.

Like Tam said, and I paraphrase; “Even if every other gun owner on the planet tried to kill someone last night; I didn’t, so leave me alone!”

And that’s really it, isn’t it?  As the story goes, Sodom and Gomorrah would have been spared for just one righteous person.

The concept of a right is a purely moral concept, and if you can find where the Bill of Rights was to be dependent on statistics, I’d like you to show me.

The communists hate the concept of unalienable rights, and will use stats as a way of changing the subject– of completely reframing the conversation.  I call them “tweakers” because all they care about is tweaking this and tweaking that, using the force of government ostensibly to get some predicted result in the statistics.

That’s a communist premise, and it stinks right from the get go.  It puts us into disparate groups, each being ruled according to its status.  Statistical arguments alone, either for or against a “right” imply the non-existence of rights by ignoring them.  Conversely, if rights truly exist, stats have no bearing on them, and the discussion is purely about morals– right verses wrong.

Our premise is, or should be, that justice demands the respect of all human rights, all the time, that rights belong only to individuals, just as criminal prosecutions are of individuals.  If you didn’t violate, or attempt to violate, someone else’s rights, you are to be held harmless in all regards.  If there were only one, that is the American principle.  If that ideal is not upheld, you have no rights and in that case your statistics won’t save you.

The communists know exactly how this works, and you all know that they know it, and of course they hate the very concept of rights.  They will ignore it and fall back on statistics.  It’s a pretty clever, evil trick.  I’ll give them that, but what else have they got, being that they’re on the wrong side?

That is where we (I hope) differ.  Not only is the moral rights concept all we need, it is all that can work in the long run to persuade good people.  If we rely on stats, we’re relying on the weather, essentially, because stats, like the weather, are not only very fickle but are subject to interpretation, while rights are eternal.

Sure; bring out the human interest stories– we probably don’t do near enough of that, all told, but start them, and finish them, with the moral Declaration.  There’s not a Republican alive, and very few in the NRA, who can do this, so it’s up to us.

Imagine the implications

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Last week Ry came into my office and told me of an article he had read.

This is the “money quote”:

When the four molecules key to the smell of rose were combined with an olfactory white mixture, the rose smell was effectively obscured — showing that olfactory white could be used to mask odours, from the smell of public toilets to that of cocaine or explosives.

If that works on dogs as well as human the implications are very interesting.