My Pickett N803-ES has the root scales, along with the A & B and this video cleared up a lot on that plus now I know a good reason to fold at pi. Thanks!
@Ensign_Cthulhu
8 жыл бұрын
The key to knowing which R scale to use is to express the input in a bent sort of scientific notation, as a multiple of an even power of ten. This way your significant digits are always a one or two figure number (plus decimal places) and the decision on whether to use R1 or R2 is easier. It's a horrible misuse of scientific notation, but an easy aide-memoire in cases like this.
@ProfessorHerning
8 жыл бұрын
For those that like this idea, it would also work when using A/B and trying to decide which half to use. For K, use a multiple of three.
@ProfessorHerning
8 жыл бұрын
Also, I wouldn't call this a horrible misuse of anything -- if you understand why this works, you're just using math appropriately to solve a problem.
@VintageProjectDE
5 жыл бұрын
@@ProfessorHerning I'm a bit late to the party, but just sitting here and following along on my Aristo Studio and the Nestler no.9. Isn't the 'even powers of 10' rule a direct consequence of taking powers of 10 out of the square root? sqrt(10) is part of the question, but sqrt(100) just contributes a factor of 10 to your result, and you 'remove' sqrt(100) as many times as necessary to fit your radicand on your A (or R1/R2) scale. At least that's where I ended up after this video, trying to transfer from R1/R2 scales.
@ProfessorHerning
5 жыл бұрын
That's exactly what's happening, although there's many ways to understand it.
@MexterO123
5 жыл бұрын
When you mean replace the A and B scales, does this mean the R1 and R2 scales can do everything the A and B scales can do?
@ProfessorHerning
5 жыл бұрын
On the original Versalog 1460, squares and square roots are supposed to be calculated using the root scales where on a slide rule with A/B, those are used for the same operations. Usage is a little different and many people miss A/B on the Versalog. A later revision of the Versalog does contain the A scale (as well as the root scales). For those basic operations, using the root scales gives you a higher resolution answer since you are using longer scales than when you use A/B, but sometimes having A/B around is nice for chaining calculations.
@elmoreglidingclub3030
3 жыл бұрын
Professor, do you attend any eastern or southern Oughtred events? Are there any?!
@ProfessorHerning
3 жыл бұрын
I haven't heard of any happening recently. I might of they do..
Пікірлер: 10