How much is a slide rule worth?
These can run close to $1,000 in good condition. Whatever you do, be sure any slide rule you buy is fully intact and working, as finding replacement parts for a specific model (especially the cursor) can be next to impossible.
What is the best slide rule?
Faber-Castell 2/83N Novo-Duplex: Size 38 x 7 cm, 30 scales, plastic. This model is regarded by some as one of the finest slide rules ever made. Its combination of size, build, sophistication of scales offered and attractive use of colour gives a slide rule that impresses!
What is slide rule math?
slide rule, a device consisting of graduated scales capable of relative movement, by means of which simple calculations may be carried out mechanically.
Are slide rules still used?
Slide rules are still commonly used in aviation, particularly for smaller planes. They are being replaced only by integrated, special purpose and expensive flight computers, and not general-purpose calculators.
Can you still buy slide rules?
There are many pages about slide rules on the web, and you can still buy brand new slide rules (40 years old but never used, and still in their factory supplied box) in various places.
Can slide rule be used to measure length?
Though similar in name and appearance to a standard ruler, the slide rule is not meant to be used for measuring length or drawing straight lines.
Do they still make slide rules?
Though they’re no longer produced, the company still stocks around 1,200 or so and occasionally gets an order for some. Why would anyone still want to buy a slide rule, when inexpensive calculators are so readily available? According to Haase, slide rules are better suited to some functions than are calculators.
What is slide rule based on?
The slide rule is based on the work on logarithms by John Napier and was invented by William Oughtred. Before electronic calculators were developed, slide rules were the tool used most often in science and engineering.
How did a slide rule work?
A slide rule works by adding or subtracting the numerical exponents of numbers for multiplication or division, respectively. Thus, numbers to be multiplied or divided are converted to their logarithmic values and their exponents are added or subtracted.
What is a slide rule in math?
The blue hairline is first positioned over 1.5 ( = 15/10) on the lower ruler.
What are slide rule scales?
Basic concepts. In its most basic form,the slide rule uses two logarithmic scales to allow rapid multiplication and division of numbers.
How to use a slide rule?
Scammers pretend to be from an organization you know: Scammers often pretend to be contacting you on behalf of the government.
What is the slide rule?
slide rule, a device consisting of graduated scales capable of relative movement, by means of which simple calculations may be carried out mechanically. Typical slide rules contain scales for multiplying, dividing, and extracting square roots, and some also contain scales for calculating trigonometric functions and logarithms.