I did my A Level exams with a slide rule. Five years later I was using a Casio scientific calculator and writing stats analysis programs for THE computer at my college for my Diploma in Management Studies. I still love slide rules. They designed Vulcan, Blue Steel and Concord, and the ships my grandfathers sailed. I have my father's, with his main engineering formulae printed on its back. He literally did rocket science with those equations and that slide rule.

Before the advent of electronic calculators, the Irish Department of Education used to issue a little yellow book of Logarithm, Trigonometric, Physics and Chemistry Tables for Secondary Schools (High Schools). The Department's genius touch was that we were provided with a clean copy of the 'log book' for the high school graduation (Leaving Certificate) exam, which is the portal exam to third level colleges. Even the fairly average student was aware that if you knew and understood how to use what was in the 'log book', you were already half way to doing ok in the exams. We came to know that little book backwards, and knowing it made us numerate in a way high school students today seldom seem to achieve.

@sliderulesandmathematics9232

Ай бұрын

Exactly. We made a grave error in letting calculators in the high school

@peterclancy3653

Ай бұрын

I had one of those books, imagine its value 200 years ago

@dwight4k

2 күн бұрын

​@@sliderulesandmathematics9232and now they're letting AI in.

It’s a beautiful object of industrial design. But so is the HP-45. I do agree with the other comments that the Slide Rule and long hand computation give you a superior feel for numbers unlike anything else.

As an engineering student, I was darn good at using my slide rule back in the 1960s. I knew all the scales. I still have it. Mine has a belt loop on the case. I could wear it walking around campus. Pretty nerdy huh? I also had a pocket protector, which was actually more than nerdy. Ink pens leaked a lot in those days.

Thank you, Bob, for your video. For those who are unaware, a "10 inch" slide rule has an actual scale length of 25.0 centimeters which is 9.84252 inches. This was because slide rule manufacturers used an international standard scale length of 250 millimeters.

@sliderulesandmathematics9232

Ай бұрын

We refer to it as a 10 inch SR because- Murica. But of course you are correct. A 20 inch slide is actually 50cm.

@pawelpap9

Ай бұрын

@@sliderulesandmathematics9232What is Murica?

@Absolotle

Ай бұрын

​@@pawelpap9 America

@paulbork7647

Ай бұрын

Some might be unaware of a concerned with a conversion of a three significant digit number (25.0) to a six significant digit number (9.84252).

@DemPilafian

Ай бұрын

Fortunately, Americans in STEM who cling to imperial are fading out of existence. I've even switched to metric recently for my home projects, and millimeters are way more convenient for measuring and cutting. We are metricating slowly, but it is happening.

I started college in the fall of 1975. Using my savings, I bought a “Bowmar Brain” calculator in the fall of 1974 which I used for my high school physics class. Nobody else in my class had a calculator. By the spring of 1975, both Texas Instruments and Hewlett-Packard came out with “scientific” (notation) calculators. About half the students in my college Freshman Chemistry class started out using slide rules. After the first examination, almost everyone was using a calculator. After the second examination, all those who had clung to using the slide rules had either switched to using a calculator or dropped out of the class. By the time of the final examination, NOBODY was using a slide rule. For the remainder of my college career, I never saw a slide rule again.

@sliderulesandmathematics9232

Ай бұрын

I started high school in 1975 so I just missed it

@James_Knott

Ай бұрын

My first calculator was a Rapidman 800, which was just a "four banger" (four function) with fixed 2 decimal points. My next one was a Novus Mathematician, which was a full scientific calculator that used RPN. Then, I had a couple of Sharp scientific calculators, one of which is still in my desk drawer, along with a Pickett Microline 120 slide rule, which I bought when I started high school in 1967. These days, I have "RealCalc" on my Android phone.

@boydovens4180

Ай бұрын

Yes being at college in the early 70s , i always remember seeing a lot of trash bins with slide rules in them , with the introduction of pocket calculators . My college tutor showed me his calculator he bought in the states , it was like a small brick in size, with basic functions he then showed me his scientific calculator it was light years ahead in capacity and functions .

@kaoskronostyche9939

Ай бұрын

In Middle School we used Log tables. In High School they deemed us ready for slide rules. Everyone had one and used it every math class ... or tables, and did so well into University. I remember when my science nerd buddy got one of the first TI/HP calculators (can't remember which one) on campus in 75 ... what a thrill.

@James_Knott

Ай бұрын

@@kaoskronostyche9939 We used log tables in high school math class but a slide rule in electricity, electronics and physics. That was likely HP you had, as TI came a bit later.

In high school, we lived with our slide rule. No self-respecting person was ever without one!

I've never used a slide rule but they were cool to me even when I was a kid at a time where pocket calculators started to appear in my country. Slide rules gives you a different dimension to the numbers you are looking for. That dimension is in the movement of your hands that feeds back into your brain. That movement gives you an insight to what the numbers are actually doing. It's not about precision but about the engineer feel for the problem. If you want precision you can get it but that is irrelevant most of the time. I've had the privilege of having a microwaves class where the teacher asked us to make all calculation in our head. It was not about precision but about the feel for the numbers: was that answer about two volts or two hundred? It was not about decimals. By the end of the first hour I came to an appreciation of what he was trying to do even though I was silently mad at him for 'forbidding' pocket calculator. Doing all those rough calculation in our minds was not necessarily faster. It was faster in giving us insight.

I got very comfortable with my "slip-stick" (I still have it somewhere) while getting my BSEE from 1970-1974. There is no better way to develop intuition about engineering calculations than spending hours every day doing them on a slide rule. In my five decades as a professional, that deep intuition about numbers is arguably the most valuable asset that I acquired during my undergraduate years. The ability to look at or listen to an analysis and "smell" that something isn't right is especially crucial when time or life and limb is at risk.

@sliderulesandmathematics9232

Ай бұрын

Absolutely. I would essentially outlaw calculators in high school in favor of slide rules. When you are working the trades or going to college then you can use calculators to apply the insight you learnt with the sticks

@sliderulesandmathematics9232

Ай бұрын

We are hitting the LL scales next, then specialty scales like P and hyperbolic trig

@ronniel5941

Ай бұрын

Yes, the Tay Bridge which collapsed in 1979 looked unsafe even to untrained people, some of whom refused to cross it. Lessons were learned, and the later Forth Bridge consequently is very sturdy indeed.

@sliderulesandmathematics9232

Ай бұрын

One of the more subtle aspect of the slide rule is the 3 significant digit precision. As a result, many things were slightly 'over' engineered just to make sure...

I had a student quality slide rule in HS in the 70's. Last year, some slide rule videos crept into my YT feed probably because I did some researching of the fantastic movie "Hidden Figures" where they showed all the slide rules being used during the space program. Anyway, I went on Ebay and found the same model I had and bought one, and bought a little larger one to relearn how to use them and play around with them. It brought back fun memories and the beauty of them. I love watching these videos. Unfortunately, it make me feel old lol

Thanks for this. I have a British Thornton stored away somewhere but haven't used any slide rule since my first job in R&D at British Steel about the time the first calculators turned me into a lazy sod. Tried to impress my offspring with the genius of a device that needs human intelligence for its operating system, but....

@sliderulesandmathematics9232

Ай бұрын

I got a Thornton or two this week

This site is an interesting find. I still have several slide rules from my school days in the '60s. Also had several 'Concise' brand circular rules.

@azgrapefruit

Ай бұрын

Concise (Japan) STILL makes those circular slide rules….I bought one for my slide rule collection. I didn’t think there was much of a market for those, but they must sell enough of those to make it worthwhile.

Until very recently I suspect, all airplane pilots were familiar with and used a circular slide rule for routine nav calculations. I have one along with 6in. and a 10in. straight plus a telescopic Otis which I never really got the hang of! Wonderful tutorial.

@sliderulesandmathematics9232

Ай бұрын

The e6b

@sliderulesandmathematics9232

Ай бұрын

I just got an Otis but haven’t played with it

@user-xu5vl5th9n

Ай бұрын

E6B is "the most reliable computer in the cockpit".

I'm 83 and a retired Engineer. Brings back many memories. I bought my first slide rule in 1961. I still have it, along with 3 more. My first electronic calculator was bought in about 1975, I think. All it could do was add, subtract, multiply, and divide. It cost me £80! Still got that as well. In about 1997, my daughter's mathematics classroom in high school had a large 8 foot long basic working slide rule on the wall. I asked the teacher if he used it, but he didn't know how to. I offered to teach him, but he declined. I offered to buy it, but my wife vetoed that. Pity. It would look good on the wall of my man-cave. (Thinks: I believe I could make one in my workshop. Secretly, of course.)

@sliderulesandmathematics9232

Ай бұрын

I have a 7 foot Pickett

@sliderulesandmathematics9232

Ай бұрын

I also have my father’s (ME U of M 59) and grandfather’s (CE Cornel 25) KE slide rules

I still have my Blundell Omega 605 - with me now for almost 60 years and it still works😂. Original leather case needs re-stitching.

We lived with our slide rules back in the 60s. I bought my first TI calculator in 1972 for $275.00, (the only one in engineering dept).. suddenly, I had a lot of friends.

@sliderulesandmathematics9232

Ай бұрын

I bet you did and that you got really good with it.

@kenofken9458

Ай бұрын

$275 was pretty serious cash in 1972.

@sliderulesandmathematics9232

Ай бұрын

I'm told it is on the order of $2400 today.

I remember walking around the U of Illinois campus in the early 1960s wearing this on my belt. We used to have fun seeing how fast we could draw them out of the case.

@sliderulesandmathematics9232

Ай бұрын

Boys will be boys. Everything is a challenge

My K&E Decilon slide rule has Sq1 and Sq2 scales analogous to the scales you demonstrate here, but I had never looked at them until today!

@sliderulesandmathematics9232

Ай бұрын

Yes, my dad was a KE fan, me I prefer the picketts or the German tiles with the P scale. I have his 4080-3 from his college days and my grandfathers KE from the 20’s

@sliderulesandmathematics9232

Ай бұрын

I also have a very nice KE 20 inch rule

I was a student in one of the last classes at the US Naval nuclear power school that was required to use slide rules. (This was in 1977) One or two classes later, they started allowing the use of calculators. I was shocked by the drop in understanding of basic mathematics the resulted from that decision.

There were scientific slide rules where a lower line was 1 and the upper line was times Pi just looking up on the hairline without moving the sliding middle. And commercial slides where the lower line was 1 and the upper one was times 360 ( daily interest) and mark up or down was easy. Yeah, and I know how to do slide rule stuff with logarithm tables ( lookup values adding and looking up the reverse value) with pen and paper. But I’d prefer my Casio scientific calculator or TI- spire CAS app if I had such problems at all. All I do is throwing SQL results at Pivot tables. The faber Castell SR had an additional magnifying lens as accessory that could be attached to the clear thingy for improved (lol) precision.

Those were the days. I remember one exam at university my brand new electronic calculator gave up the ghost. Thank goodness I had my old slide rule at hand. I think that I still have it in a box in the attic - the electronic calculator has of course gone the way of all electronic devices.

Brit here : Slide rules were/are? fine for structural design, as it involves varying factors of safety and empirical strengths of materials. I mainly did highway design, pre-computers, and that did need strings of significant figures. I mainly used 8-figure logarithms, and eventually a crude Friden calculator, which cost £800. A very senior colleague much later gave up his slide rule only because of the constant jeering he got from the youngsters with their fancy calculators. We went completely metric on 1/1/1968, except for the distances on road signs.

@pentachronic

Ай бұрын

Not completely metric. Pints of beer, pounds of flour, etc. Weights and measurements were imperial.

@ronniel5941

Ай бұрын

⁠​⁠@@pentachronicI agree ; I was trying to to refer to UK civil engineering in particular. Of course we now buy our road fuel solely in litres, but still talk about miles per gallon. I don’t think litres per 100km will ever catch on here, especially with mildly eccentric Britons such as myself.

@DemPilafian

Ай бұрын

@@pentachronic I'm a beer drinker from the future and I just wanted to drop in and let you know that a "pint" is *NOT* a unit of measure. A "pint" simply means a glass of beer. A glass of beer is generally about 500 ml, but it varies a lot. If you prefer your beer in a can, you can ask for a "tinnie" instead of a "pint".

@pentachronic

Ай бұрын

@@DemPilafian Legally in the UK a Pi t of beer IS a pint. This is controlled by the weights and measures act. Now you know! www.cityoflondon.gov.uk/supporting-businesses/business-support-and-advice/trading-standards/weights-and-measures#:~:text=Most%20pubs%20use%20what%20are,the%20level%20of%20one%20pint.

@pentachronic

Ай бұрын

@@DemPilafian Legally in the UK a Pint of beer IS a pint. This is controlled by the weights and measures act. Now you know! www.cityoflondon.gov.uk/supporting-businesses/business-support-and-advice/trading-standards/weights-and-measures#:~:text=Most%20pubs%20use%20what%20are,the%20level%20of%20one%20pint.

Only use mine for nostalgic fun since the HP-35 calculator came out many years ago. Fun to be reminded of features whose use I'm no longer sure of.

@sliderulesandmathematics9232

Ай бұрын

Glad you like the series

I still have mine. Got me through Caltech in the late 60s. There were Pickett fans and K&E fans. Only the nerdiest hung them on their belts : ) I bought an identical one on Ebay for my granddaughter. I still have my little plastic circular slide rule from then, as well.

@sliderulesandmathematics9232

Ай бұрын

Cool. My only experience with a slide rule as a primary calculating device was the e6b flight computer

@carlkaufman2429

Ай бұрын

@sliderulesandmathematics9232 During my first year in grad school (1972), the (Astronomy) department bought a newly available HP-35 calculator for the (12 or slightly more) grad students to share. It was chained to a desk in our grad student lounge : )

@sliderulesandmathematics9232

Ай бұрын

And to think calculators are as valuable as paper clips now it seems. I think we all just use the free one on our phones

@sliderulesandmathematics9232

Ай бұрын

I prefer the tan/cream colored Pickett n3. Great scales and doubles as a katana

Thank God I started with abacus and skipped the slide rule show straight into calculators. Most school was done with paper and pen. Yes, they insisted on pen because errors were counted against your grade. I did see and use ink wells and quill for calligraphy too. Oh! The old days!

I have 4, 3 K+E and my Dad’s Dietzgen super duper log log mondo scale rule. The Dietzgen has a high quality feel to it.

Long since misplaced my slide rules & log tables which were part of my life throughout school, my phone has an app which would have flown Concorde or controlled the space missions, but I largely use it for simple arithmetic. So much change in so few years!

Very cool. I have one Pickett rule, but not the model with these great scales on it.

@sliderulesandmathematics9232

Ай бұрын

The Puckett n3 and the Aristo Studio. 0968 are the models I recommend. Plus there is a good virtual slide rule (n3) on the web. Link in the description

I’ve had couple during high school and college in the 1960’s. I still have and use my Diva 6” made in Denmark. I was given this one by an Ag professor at Michigan State for remodeling a room at his house. He didn’t give me any break on grades, in case you are wondering.

In the early '60s, we got three-place answers, but we had to calculate the place, 1.0, 100, or .001. Villanova had an IBM 1620, the size of an upright piano. We used punch cards and made money troubleshooting other students' errors. Now, we use a concrete slide rule for the quantities. I then enter all the numbers into a program to verify the answers. At $265 a cubic yard, we cannot error. BTW; IBM could calculate massive cut and fill jobs, and calculate the offsets, etc.

I've relied on software devices for calculations for many decades, but I used to have calculator and I was taught to use a slide rule, which I still have. Slide rules are still great for teaching about accuracy.

I had a cheap 6 inch plastic slide rule going through engineering school in the early 1970s. I only needed the basic scales. I eventually got a Texas Instruments scientific calculator. I could also use the college computer (punched cards in FORTRAN).

in th 60's and 70's ,there was the hemmi slide rule made with bamboo and plastics. it was made in japan.with a leather case.

😂😂😂 my teacher from Aviation Academy back in 1983, in Riga. Always tried to maintain, that you can find the size of anything without knowledge of basics, excellent for fast figuring physics, mathematics, music.😂

I still have a Faber Castell sliderule that I bought in 1965 for £5/10 shillings. £5.50 in modern GBP. That was what I earned working 2 weekends in a garage when I was at school. I got a degree in Electrical engineering using it. I lost the rubber ends for mine just as you don't have.

Thanks for the video.

@sliderulesandmathematics9232

Ай бұрын

You are welcome!

I have here a yellow Pickett Microline 120, which I bought back in 1967, when I started high school and it still works! 🙂. It's a basic slide rule, which I used in my electricity, electronics and physics classes. I paid $2 for it, IIRC. I also recall my electronics teacher had a slide rule that was customized for electronic calculations and included things like reactance.

@rivernet62

Ай бұрын

Ok. Sure but the batteries for that model are so expensive

@sliderulesandmathematics9232

Ай бұрын

you can get them on line on Amazon. Right next to the Kidneys.

Damn, brings tears to my eyes. I remember quite well when, as an undergrad EE in 1970 something professor Leon Zelby showed us how to use the binomial expansion to get accuracies of 5 decimals from a slide rule. Damned if I remember how ro do that now. He still had his concentration camp tattoo. Wonderful soul.

Thank goodness for the invention of the electronic calculator.

@Trevor_Austin

Ай бұрын

You may have missed why slide rules are such superb tools. If you just use an electronic shoveler you’ll never know if you have made a huge mistake. Slide rules however force you to determine the order of magnitude estimate and then a rough idea of the first few digits. For example, what are the square roots of 2, 20, 200 and 2,000? On a calculator you might not determine if you have left of a zero or even typed in the 2 correctly.

@heronimousbrapson863

Ай бұрын

@@Trevor_Austin Perhaps you meant that slide rules WERE superb tools when they were the only option. I don't know anyone who continued to use tnem once electronic calculators came out.

@sliderulesandmathematics9232

Ай бұрын

I do for many things, especially trig.

@claudiamanta1943

Ай бұрын

Not really. Calculators and computers only make people unwilling to think.

The double-length square root scale is a nice feature of the Picketts. I used a Model 4 in high school and college, which I still have.

@sliderulesandmathematics9232

Ай бұрын

yes, the n 2/83 has the W scales which are similar.

Have you looked at circular slide rules? I had a 600 inch equivalent with 5 digit accuracy. But I often had to solve the problem with a regular slide rule to make certain I was on the correct spiral scale.

@sliderulesandmathematics9232

Ай бұрын

Yes o have a fuller and a precision circular rule

First time here. Grew up with slide rules. Father had one to calculate trigonometry and metallurgic properties. As students through middle school, high school and into university until the HP and TI units came out, slide rules and math tables all teh way. Now I have to go dig out my collection of slide rules and see what I have. Cheers!

@sliderulesandmathematics9232

Ай бұрын

Cool have fun

I still have my slide rule from high school physics in 1970. The kids with the money bought the first of the pocket calculators from Texas Instruments. The teachers told those kids to put them away because, one day, the battery may die and then they'd be stuck. Years later, when I was doing my accounting studies, I bought a calculator. A solar powered calculator. I still have that too. And it still works. But the slide rule is still pretty neat to have.

@sliderulesandmathematics9232

Ай бұрын

They are indeed

That was very interesting, it's been years since we had slide-rule classes in Junior high. I've forgotten everything about them. I should probably revisit the skill again. Any suggestions for doing that?

@sliderulesandmathematics9232

Ай бұрын

Well I just put this series together. Only two more to go

In college I used that Pickett slide rule with the split scales, mine was the standard yellow. In high school I used the standard Pickett "Texas Speed Rule".

@sliderulesandmathematics9232

Ай бұрын

the Texas Speed Rule is quite rare and worth around 300 bucks today, if not more.

@billj5645

Ай бұрын

@@sliderulesandmathematics9232 I used mine a lot in UIL competition so it isn't in museum quality.

@sliderulesandmathematics9232

Ай бұрын

So you competed?

@billj5645

Ай бұрын

@@sliderulesandmathematics9232 yes.. there were some powerhouse teams in my district that were very hard to beat so I never won anything.

@sliderulesandmathematics9232

Ай бұрын

You and I should get together first a tips and tricks livestream

Hi Bob, I've never found any explanation of how the logarithmic scales were actually marked in the first place. Most slide rules say they're "engine divided". What does that mean, and how was it done? I'd love to see a video about it.

@sliderulesandmathematics9232

Ай бұрын

There was a device called a ‘dividing engine’ that calibrated the markings on engraved rules. Pickett used a dividing engine to create a template and then used it for a photo printing process.

@sliderulesandmathematics9232

Ай бұрын

americanhistory.si.edu/collections/nmah_1802358 here is a dividing engine

Maybe I should dig out my 8 inch circular slide rule. .I had trouble with my high school Physics teacher when I wanted to use it instead of doing hand math to 3 and 4 decimal places.

STILL have mine and left high school in 1969. I thought it may come in handy some time, then they brought out scientific calculators. 🥴

I really enjoyed your video, thank you 😊 My mind is very non- mathematically inclined, but it looks very interesting to the point of being good fun. Speaking of ruler…maybe there’s an etymological link to ‘rules’. The Latin root designated a measuring rod. Just a reminder for those who think they can be clever with the interpretation of Law. A rule does not bend. If it can be bent, it loses its value and is not Law. (Sorry about my rant 😄).

@sliderulesandmathematics9232

Ай бұрын

Glad you enjoyed it!

I still have my 70s-era slide rules from High School. I still use it occasionally for proportions and conversions.

@sliderulesandmathematics9232

Ай бұрын

I started high school in 75. I’m sorry I missed out on the instruction and use in the early 70’s

I have a 66" helical slide rule. Only has the C and D scales plus a log scale. Weird British device but it works.

@sliderulesandmathematics9232

Ай бұрын

Yes they get crazy accurate with those long scales.

Still have one. N-500-ES Still use it from time to time. I also use log tables and trig tables. It just depends on how I feel that day.

@sliderulesandmathematics9232

Ай бұрын

One of my favorites

They seem complex - how long did it take to get used to them?

@sliderulesandmathematics9232

Ай бұрын

Really not very. I’ve been using them for a couple of years but it took me an afternoon or two to get the concepts down. It makes sense to me

Wow. Used slide rules in high school physics. Calculators when I got to college (1971).

Wright Brothers first flight, Dec 17, 1903 > Chuck Yeager X-1, breaks sound barrier Oct 14, 1947 > less than 44 years, all with slide rule

When I started work, we had a one of the cylindrical extending models. Unfortunately, calculators were just coming into use, so it never got used properly

@sliderulesandmathematics9232

Ай бұрын

The big ones were fuller calculators. I got mine from the UK

I used a K+E 20-inch for the first year of engineering school in 1975. Our “Introduction to Engineering” class spent quite some time teaching us how to use the slide rule. In my second semester, in 1976, relatively cheap Casio scientific calculators became available in my home country, and the slide rule soon became obsolete. Some professors wouldn’t let us use calculators in the exams. They insisted we needed to really learn how to use use the slide rule in case “one day, in your professional career, you are in the middle of an empty field, and the calculator’s battery runs out of juice.” By the end of my second year of engineering school, calculators were widely in use. I still keep my K+E, however, as a reminder of my transition to college. Slide rules were some clever calculation tools, and the only portable calculation tool available to anyone from the 1600’s until about 1970.

@sliderulesandmathematics9232

Ай бұрын

I love the 20 inch KE and use it regularly. Great accuracy and clear numbering

I saw a much larger slide rule someone had ... I think it was something like effective 50m or more, printed with the scales spit around a drum. Made years ago by, I think it was a German company if I recall correctly. These were quite popular for, e.g. use in banking in the 1940s ... want to calculate that 30 year multi-million dollar loan, and be quite accurate ... yeah, 50m or so long slide rule.

@sliderulesandmathematics9232

Ай бұрын

Sounds like a fuller calculator. The scales are 41 feet long

I just missed using the slide rule - calculators just came out cheap for use to buy.

Do they have cos / tan / arccos etc? Could they be laser printed?

I still have a six-foot Pickett slide rule used for teaching purposes! Got to find a way to unload it.

@sliderulesandmathematics9232

Ай бұрын

as in sell it? I just bought a 7 foot pickett N-500 teaching rule for $450 with shipping. Hope that gives you some idea of what it is worth. You can see it in the background of this and other vidoes.

@martinhaub6828

Ай бұрын

@@sliderulesandmathematics9232 thanks for that. I will miss it. Been a part of my teaching career from the beginning. 😥

@sliderulesandmathematics9232

Ай бұрын

I am getting ready to start mine (in about 3 years) and that is why I got mine. I'll be using it in the class room. Swing by the 'slide rule fan club' on facebook and see if there are teachers looking for one there. Do you know the model of the Pickett? Mine is an N-500

1973 Engineering colleges still used slapsticks by 1976 they were history. I kept my picket for decades in 66 my first was bamboo simple 12" starter

I had to use a slide rule in high school. Hand held calculators came out when I graduated.

There's something extra when you learn about how to use tools like these "slipsticks", nomographs and such, that you don't get from a calculator or computer. They're more visual, literally hands-on, and I think they promote a better way to visualize the math in your mind.

@sliderulesandmathematics9232

Ай бұрын

Plus there are some things like tables and radioactive decay that are actually easier on the slide rule. I’m starting statics in May and plan to use mine for vectors

You pulled out the Faber Castell, and I had to back away because I started drooling on my keyboard.

@sliderulesandmathematics9232

Ай бұрын

Wait til you see the fuller calculator

@rifelaw

Ай бұрын

@@sliderulesandmathematics9232 Never used a Fuller so it won't have quite the same effect.

Concord was designed in the early 60's using only slide rules.

@sliderulesandmathematics9232

Ай бұрын

It was indeed, as was the SR 71

I used a Pickett slide rule for years as a C-141 Flight Engineer. Then, they issued HP 41CV calculators which I used until I wrapped up my Air Force career.

I had to take university physics using a slide rule. Luckily they gave 90% credit on answers that were orders of magnitudes off if you showed your work but did the slide rule manipulation wrong.

@ronniel5941

Ай бұрын

“Physics ?” - we had to do “Natural Philosophy “ - the same thing - I think !

Does anybody know a place to buy a new slide rule?

@sliderulesandmathematics9232

Ай бұрын

Not new mostly but eBay is where I get mine

Impossible to follow this guy with his super small scale and unreadable scales as well as his super rapid changing locations before one can read any of the scales. I had to use a slide rule for surveying classes in spring 1972. The number of digits were to few to get accurate values of small angles with the trig functions. We had to do calculations long hand on paper. By the way, all the Apollo moon shots used slide rules to perform almost all the calculations.

Many pilots still use circular slide rules as they don't need batteries.

@sliderulesandmathematics9232

Ай бұрын

The E6b

@karhukivi

Ай бұрын

@@sliderulesandmathematics9232 Yes, that is one of them, mine is the Airtour "CRP-1 Computer"

I carried an aristo in college. I started college in 1959. Not sure when I bought the aristo.

@sliderulesandmathematics9232

Ай бұрын

Great slide rule

@robertdeland3390

Ай бұрын

​@@sliderulesandmathematics9232still have the aristo. One nice thing about the slide rule is that "all" of the answers are available, so you can visualize how thing vary in and around your answer. Calculators only give a number.

@sliderulesandmathematics9232

Ай бұрын

absolutely

Master

My 50 or so year old Pickett slide rule works fine. It never needs batteries.

@us-Bahn

Ай бұрын

I have a mini sun-dial wristwatch. Runs great.

Did anybody else have a giant working slide rule positioned at the front of the room inmhigh school math class? For demonstration purposes.

@sliderulesandmathematics9232

Ай бұрын

I have one in my living room. I use it for big problems

@us-Bahn

Ай бұрын

In addition to the class textbook we also used the big CRC book of of trig & logarithmic tables. Math was heavy.

ps: I remember being too lazy to remember my multiplication tables and using a rule....LOL

PRECISION!

@sliderulesandmathematics9232

Ай бұрын

True I will change it

IT I.S. 2 muCH for me, sir

@sliderulesandmathematics9232

Ай бұрын

Watch it a second time. It will come your way you.

cool

Geeks!

@sliderulesandmathematics9232

Ай бұрын

Absolutely!

@allenshirley1077

Ай бұрын

Or dork! As in Doric! 😂

who knew

@sliderulesandmathematics9232

Ай бұрын

The shadow knows.

Can’t see a thing… 😮

I have ---- wait a minute. Who the hell cares if I have an old slide rule or not!

@sliderulesandmathematics9232

Ай бұрын

We do

@KpxUrz5745

Ай бұрын

@@sliderulesandmathematics9232 Ok. Well actually I have a couple of the finest slide rules ever... somewhere in my stuff. See, my dad was a real (early) rocket scientist. I'm serious. He worked at White Sands and also at the ICBM missile base in the Marshall Islands, a good while ago.

@sliderulesandmathematics9232

Ай бұрын

fantastic!

@KpxUrz5745

Ай бұрын

@@sliderulesandmathematics9232 Hello again. I don't know if something odd is going on with youtube, but I no longer see my longer comment to which you replied "fantastic!".

@sliderulesandmathematics9232

Ай бұрын

I see it.

Slide rule porno click bait and I fell for it? To find Bob the Science Guy I watch on your other debunking channels? I have my fav old school Pickett on display. I was a Math Lab asst in college in '70, '71' and taught slide rule to the general class.

Most kids today have no idea what a slide rule is, or how to use one.

@sliderulesandmathematics9232

Ай бұрын

Hence this series

@Jimmy-Legs

Ай бұрын

Why would they?

@phantomcruizer

Ай бұрын

@@Jimmy-Legs🤔You never know that knowledge may come in handy one day😎

@Jimmy-Legs

Ай бұрын

@@phantomcruizer I’m sure they could figure it out quickly.

@lunam7249

Ай бұрын

most kids cant use the calculator on thier $1000 cell phone🤦🏻‍♀️🤦🏻‍♀️

Your 20" is most likely a half-metre

@sliderulesandmathematics9232

Ай бұрын

Yep

What a madness! Just use the metric system which fits to all other basic units of physics, this nonsens would be obsolete...

@sliderulesandmathematics9232

Ай бұрын

Murica

@stehbar

Ай бұрын

this has nothing to do with the units of measure, but with the fact that the scales on the ruler are logarithmic and not linear

@ZedAlfa.

Ай бұрын

#’s are dimensionless

@patavinity1262

Ай бұрын

The slide rule is a calculation tool, and has nothing to do with units of measurement. They were used all over the world, including in countries which use the metric system as standard. It is the analogue equivalent of the pocket calculator, therefore your comment is the equivalent of saying "just use the metric system and calculators will be obsolete".