wbeaty

4 ms·

1.
by wbeaty 6mo ago
They grind up your skeleton, remove the dental gold, then re-name it "ashes?" That's not very "green." Why not add this to your will: 1. place my body on a pile of dynamite on an Oregon beach, and blow it up (first
2.
by wbeaty 4y ago
Also, back in 1838, Charles Wheatstone reveales the secret of scratch-holograms, but he never followed up on it. http://amasci.com/amateur/holowhtstn.txt He did say that the 3D light-effect seen in lathe-turned metal p
3.
by wbeaty 4y ago
It needs to make a polished groove or smooth surface-divot. Definitely use colored or black plastic, to promote surface-absorption. The real key is to eliminate jaggies. Either your steppers need micron resolution or better, or the lase
4.
by wbeaty 4y ago
All in HTML 1.0 written by hand, from Unix shell C, using pico. When I started, I was getting huge international traffic, from people seeing near-instant page-loading when using 2400 baud dialup. I think classrooms were using it for ESL te
5.
by wbeaty 4y ago
A kid on Youtube invented the rotating version (scratching complete circles, then turning the plate.) Then an MIT student worked out a way to eliminate the second unwanted image; the pseudoscopic inside-out one. He gave talks on the tech
6.
by wbeaty 4y ago
Guy at MIT made huge numbers of them, using a robot-arm and sharp tool. He worked out an algorithm to interleave the short scratch-segments, so dense intersecting scratches don't ruin the image. His art is now in a mathematics museu
7.
by wbeaty 4y ago
Credit-card security holograms ...not true holograms either. Right? They need no monochromatic illumination. And they don't employ any interference in order to produce their 3d images. That's the whole trick, really. "S
8.
by wbeaty 4y ago
The light coming out of the scratch-hologram must be coherent. That means, the scratches must be mirrors (like smooth grooves, or bent silver wires, shiny curved spiderwebs.) Normal raster-displays emit incoherent light, and their image
9.
by wbeaty 4y ago
Still alive. Mostly over on Quora now, answering science questions (posting Tesla stuff.) https://www.quora.com/profile/William-Beaty
10.
by wbeaty 5y ago
It was started by a famous paper from Ludwig Prandtl, in ?1920?. The math is easy, if vortex-shedding is removed, and our wing has infinite span. Nobody realizes that an infinite wing is permanently trapped in ground-effect mode, and only
11.
by wbeaty 5y ago
But if air is pushed down, then it must continue moving down (much like with a hovering rocket, or a helicopter.) But this effect does not appear in typical airfoil flow-diagrams. Instead, the air approaches horizontally, and leaves horizo
12.
by wbeaty 5y ago
"There is no gravity in outer space. Gravity ends at the top of Earth's atmosphere. That's why astronauts in the ISS are weightless." Simple and concise. Easily understood by little kids. Textbooks in the 1950s actua
13.
by wbeaty 5y ago
It's wrong because the force on the lower airfoil surface is far smaller than the total lifting force. The flow above the airfoil "sticks" to the airfoil. Since the upper flow is being forced downwards by the curved upper su
14.
by wbeaty 5y ago
If it's a 3D wing with finite span, then you're well into vortex-shedding and momentum-carrying plumes of gas. The usual way to avoid this is to make the wingspan be infinite, with no wingtips. But this is dishonest, because it
15.
by wbeaty 5y ago
His statement is right, but it requires that tip-vortices and downwash-plumes exist. The air behind the wing is carrying momentum, and is left with downward motion. (In typical 2D airfoil diagrams, this cannot happen.) Also, his statemen
16.
by wbeaty 5y ago
Many generations of professional pilots have been taught the "equal transit theory." It's often as an answer their licensing exams. So, most pilots have little idea how wings actually work. (But since the rise of the inter
17.
by wbeaty 5y ago
Ocean waves work like this: water molecules are piled up in humps, and all the molecules slide across the ocean, while the water underneath the humps does not move. If you poured some dye into the waves, the water-humps would carry it alo
18.
by wbeaty 5y ago
He's wrong. All those explanations ARE intended to explain flight! They're given to professional pilots without qualifiers, presented as if they were complete explanations. (If they weren't, then the controversy would ins
19.
by wbeaty 5y ago
In 2D airfoil diagrams, first the parcels approach horizontally. Then they are mysteriously accelerated upwards. Then the airfoil accelerates them downwards. Then behind the airfoil, they're mysteriously accelerated upwards again, s
20.
by wbeaty 5y ago
I don't see it. "Longer path" is an incorrect explanation for why the air above the airfoil moves faster. Yet the air above the airfoil really does move faster, as that webpage correctly describes. (That webpage doesn&#x27
21.
by wbeaty 5y ago
On the other hand, simple intuitive explanations may not lead to simple mathematical analyses. Things which are obvious and simple to grasp, may involve near-insoluable systems of equations! This seems to be the case with lifting force.
22.
by wbeaty 5y ago
It's not complicated, instead it's HERETICAL. It directly violates Bernoulli/Euler, because with downward accelerated air, the parcels continue moving down, long after the wing has passed by ...meaning that energy has been i
23.
by wbeaty 5y ago
Monthly meetings, Tesla-worshippers only. Also some UFO abductees and orgone-believers. Also Boeing engineers and radio hams. http://amasci.com/freenrg/oldmeet.html
24.
by wbeaty 5y ago
https? We don' need no stinkin' https. We are from BEFORE GEOCITIES! Usenet Newsgroups forevah. See amasci.com 1995 timeline: http://amasci.com/news.html#older Also, see much recent activity on: https:/&#
25.
by wbeaty 6y ago
Hot 4mm arcs, cuts through thin plastic, or sets fires. Since 2005, hobbyists started making cigarette lighters from these. Then someone started actually marketing them. Then someone else came up with a switched, double-arc version with a
26.
by wbeaty 6y ago
The column of charge inside a metal wire is usually called "metallic electron-sea" or "sea of charge." In other words, all metals are always full of electron-fluid. They're like plumbing pipes, but pipes which are
27.
by wbeaty 6y ago
Maybe you're missing a key part: all wires are already full of electricity (full of electrons.) When a current starts up, it's the wires' electrons which start moving. In a circuit, no electricity is created and no electri
28.
by wbeaty 6y ago
But lightning is where the gas has broken down, turning into plasma. Lightning is a growing conductor, like a motorized antenna on an oldschool car radio. The growth of lightning is much like a growing metal dendrite-crystal. Also, when l
29.
by wbeaty 6y ago
> what are the other charge carriers? Electrons flow in metals, but inside most non-metals, free electrons don't exist. For example: Protons flow in acids. But chemists call protons "+H ions" +Na and -Cl flow in salt wat
30.
by wbeaty 6y ago
"Why is electricity so hard to understand" has a first line. It tells you that it's not an article. It's a crapload of unedited notes I scribbled down in random order on little scraps of paper back in 1988. You compla

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