Slide Rule
I paid a little over $200 for this one. I was happy with that price.
that was a bargain. I would go for that price in a heartbeat
I paid a little over $200 for this one. I was happy with that price.
I see you have a K scale. That is x^3 typically.
The cursor also acts like a sort of memory register. Say you did 2x4=8. Say now you want to multiply 8 by 2. You put your cursor over the 8 then run one of the 1 indexes to your cursor (either right or left which ever one doesn't run 2 off the scale). Then you read 1.6 under 2, you have to know the answer is really 16. You can go on back and forth like this until infinity.
8 is easy but if your intermediate answer falls between marks on the scale it starts to make sense that you would put your cursor over the answer then run your slip stick right or left again, nothing to remember or write down.
There is a way to know where the decimal point goes by how many times you move the "slip stick" part left or right. I just can't remember what it is now.
There is a way to know where the decimal point goes by how many times you move the "slip stick" part left or right. I just can't remember what it is now.
I computed the volume of a cylinder in cubic feet times 50 each divided by 27 for total cubic yards successfully. I considered that a major accomplishment.
There is a way to know where the decimal point goes by how many times you move the "slip stick" part left or right. I just can't remember what it is now.
Yeah, there is a method, but I never thought it was worth keeping track of. I always just did crude mental approximations to set the decimal.
Funny how you guys seemed to think i was joking about "a slide rule for the old guy on the crew", yet here you are proving me correct.
All the current tech we use still can't replace an analog device for evaluating: multiplication, division, exponents, roots, logarithms, trigonometry, etc. (no batteries, etc.)
Funny how you guys seemed to think i was joking about "a slide rule for the old guy on the crew", yet here you are proving me correct.
All the current tech we use still can't replace an analog device for evaluating: multiplication, division, exponents, roots, logarithms, trigonometry, etc. (no batteries, etc.)
I vote Curta
it always works
When I was in school thinking that I was going to be an electrical engineer we had a slide rule class. Our instructor, Fred Carden, looked and acted just like R. Lee Ermy. He had no training in how to teach, and ran the class like it was some form of Basic Training, which most of us did not respond to well. I will say that by the end of the class we knew how to use every scale on the slide rule to solve some sort of electrical engineering problem, although many of them we had not encountered yet. Still remember him 50 years later...
The eyes are glazing over on all participants under 60 at this moment. Except for the math nerds who are treating the slip stick as some magic wand to amaze their friends...........both of them.
The eyes are glazing over on all participants under 60 at this moment. Except for the math nerds who are treating the slip stick as some magic wand to amaze their friends...........both of them.
It's black magic I tell you this Automatic Proportion Stick.
Of course there is the 3 significant digit limitation, not very useful for most surveying problems. I heard a rumor there were vernier models to gain a significant digit but I haven't seen one.
