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basty

When CAD Software Is Not Published Yet

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basty

I wonder what engineer used to create the 3D model of complex shape that uses surface modeling technique such as to create an airplane when a CAD Software such as Solidworks, Catia, etc., is not yet published. For example, in the year of 1945. How they create an airplane in this year without a computer?

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BIGAL

It was called a slide rule.

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basty
It was called a slide rule.

 

What is slide rule?

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ReMark
What is slide rule?

 

Little known fact: one of the advantages of the Internet is the ability to find information on topics you know nothing about.

 

http://web.mit.edu/2.972/www/reports/slide_rule/slide_rule.html

 

http://www.npr.org/sections/ed/2014/10/22/356937347/the-slide-rule-a-computing-device-that-put-a-man-on-the-moon

 

http://www.hpmuseum.org/srinst.htm

Edited by ReMark

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shift1313

CAD is basically Math for dummies :) You can define everything we do with math, it just used to be a whole lot harder. Oh yeah and google ^ :D

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BIGAL

The chinese had a abacus way before a slide rule.

 

Now where did I put my slide rule.

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nukecad
How they create an airplane in this year without a computer?

Pencils, paper, set squares, slide rules, log tables, and of course brains.

 

I remember I was just getting proficient with a slide rule when they brought out these new 'electronic calculator' gizmos making slide rules obsolete.

 

I saw (a 1970's plastic) one at an auction recently described as 'vintage scientific instrument'.

Makes you feel old. (or vintage maybe).

 

Remember log tables?

Every schoolkid had their own set, if you showed kids a set now they would probably think its a railway timetable of some sort.

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dbroada

back in the days that I was a stress engineer we had computers but no modelling software. I had to define the surface of a rotating object giving x, y & z locations, each one located using trigonometry. We had pocket calculators (for people with very deep pockets) so didn't have to rely on "guessing sticks" - although my boss did still use an adding machine. Once we had all the punch cards prepared they would be fed in to a computer which would then produce an image on paper so you could check for anything out of place. Often this came on many feet of paper because one value was out by one order of magnitude.

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