Viewing profile — wbeaty

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 O…

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 lig…

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 you…

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 24…

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; t…

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 r…

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 ima…

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.) Norma…

Still alive. Mostly over on Quora now, answering science questions (posting Tesla stuff.) https://www.quora.com/profile/William-Beaty

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 w…

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. …

"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 littl…

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 b…

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…

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 …

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 actua…

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 s…

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 the…

In 2D airfoil diagrams, first the parcels approach horizontally. Then they are mysteriously accelerated upwards. Then the airfoil accelerates them downwards. Then behind the airfoi…

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 cor…

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 …

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…

Monthly meetings, Tesla-worshippers only. Also some UFO abductees and orgone-believers. Also Boeing engineers and radio hams. http://amasci.com/freenrg/oldmeet.html

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 recen…

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 someo…