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grlft — Slide Rule
#sliderule #analogcomputer #computer
Published: 2017-08-22 19:49:57 +0000 UTC; Views: 1996; Favourites: 4; Downloads: 0
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This is what made ALL calculations before digital computers of ANY kind were even thought of. B-52 bomber, still flying today and expected to fly to at least 2050 is a slide rule airplane. SR71, the fastest plane still flying in this modern world, is a slide rule airplane. An extraordinary number of high-performance jets were designed solely by slide rules. That includes the speed record holder X-15.Related content
Comments: 11
Now if you take a close look at the left side of the picture, you see a bunch of ones. In the middle line, look to the right to find the vertical line (rectical) in the slide. It points to 3. Go down to the bottom and you see 3. Thus, 1 times 3 equals 3.
And yeah, the other stuff does a lot more.
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Nice photo. Maybe one should note, that only multiplications and divisions as well as squares (also square roots of cause) and exponentiations were possible. Some slide rules had also sine and tangent scales...
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I believe they could also do diffe-Q. These 1-1/2 foot long things could pretty much do every calculation an engineer would ever need. You always could tell an engineering student in college back when because 18 inches of slide rule kept slapping his thigh when he walked down the street. They were made to do every calculation necessary.
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?? I do not know "diffe-Q". Definitely addition and subtraction was not possible, but any combination of division, multiplication and roots.
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Sorry. Differential equations. Partials. Integrals. Basically, if you know your mathematics, a slide rule can do it.
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You can see these in action in the movie "Apollo 13". When computers are nothing more than useless junk, slide rules still work.
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I remember back in high school most of the kids had calculators, but my physics teacher taught me how to use a slide rule, and I actually got pretty good with it, eventually preferring it over the calculator. And to think we went to the moon with slide rules; no wonder the luna-tards don't believe we really did it.
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We went to the moon on 64K of computer memory. Yeah, slide rules were necessary checks.
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That includes 32K of backup. 32K, not meg, not gig, K. 32K primary computer with 32K backup.
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U. S. Air Force just announced that the computerized CAD designed marvels, sleek B1 bombers, B2 stealth bombers to be replaced in 2030's in favor of still another CAD design B21. Meanwhile, the BUFF, Big Ugly Fat Fellow, B 52 Stratofortress bomber - a slide rule airplane - designed when there were no computers, will still be flying until 2050.
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Originally designed strictly as a nuclear bomber, today B52 is strictly conventional with upgraded electronics and rotary launching platforms carried within its bomb bay doors.
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