Who knows how to use a slide rule?
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20-12-2015, 01:53 AM
Who knows how to use a slide rule?
I was wearing my Breitling Navitimer this evening. It has a rotating bezel marked with a logarithmic scale and the dial has one as well.
Together, these form the C and D scales of a circular slide rule.

[Image: 81600g.jpg]

It got me to wondering who else here knows how to use a slide rule? Consider

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20-12-2015, 02:14 AM
RE: Who knows how to use a slide rule?
Oh I once had a mathsl teacher who would drone on and on about those. A.few months ago I had some one show me how it work. But I've already forgotten.
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20-12-2015, 02:47 AM
RE: Who knows how to use a slide rule?
The last time I saw one in action, it was in the movie Apollo 13.

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I have no idea how they work.

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20-12-2015, 03:47 AM
RE: Who knows how to use a slide rule?
I keep it right next to my abacus........

...........

(actually - I don't know what happened to mine...)

.......................................

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20-12-2015, 05:27 AM
RE: Who knows how to use a slide rule?
I had a Hi Log/Log slider in the 8th grade, moved on to a circular shortly after getting into high school. Put it away when the other students claimed I was cheating by using it. Still made top of my maths classes.
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20-12-2015, 06:15 AM
RE: Who knows how to use a slide rule?
My dad is an engineer, as was his dad, his dad, and his dad. I'm the first firstborn son in five generations to not become an engineer. However, I grew up reading every engineering book my dad brought home, and I can use slide rules.

I also went to flight school, where we learned to use a type of circular slide rule called a "Whiz-Wheel", the E6B Flight Computer.

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20-12-2015, 01:59 PM
RE: Who knows how to use a slide rule?
(20-12-2015 06:15 AM)RocketSurgeon76 Wrote:  My dad is an engineer, as was his dad, his dad, and his dad. I'm the first firstborn son in five generations to not become an engineer. However, I grew up reading every engineering book my dad brought home, and I can use slide rules.

I also went to flight school, where we learned to use a type of circular slide rule called a "Whiz-Wheel", the E6B Flight Computer.

[Image: jeppesen-e6b-1a.jpg]

My dad was a commercial pilot up till the mid 1960's.. He has one of those....

He once used it to fly a plane he was delivering from Detroit to LAX....

Flew all the way, with only a turn and bank, an altimeter and a compass.....

and flew into LAX - with no radio or electrical system......


......

Don't think I'd try it now...

Big Grin

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20-12-2015, 02:03 PM
RE: Who knows how to use a slide rule?
(20-12-2015 01:53 AM)Chas Wrote:  I was wearing my Breitling Navitimer this evening. It has a rotating bezel marked with a logarithmic scale and the dial has one as well.
Together, these form the C and D scales of a circular slide rule.

[Image: 81600g.jpg]

It got me to wondering who else here knows how to use a slide rule? Consider
I do. I still have mine. I plan to frame it and hang it on the wall.

I've forgotten how to use it.

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20-12-2015, 02:27 PM
RE: Who knows how to use a slide rule?
Clueless - I am sure that isn't a surprise.

I remember dad having one when he was in college and I liked to play with it when I was a kid.

Of course, you had to help me learn to use a graphing calculator a couple years ago so you know how inept I am with most things math. Undecided

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20-12-2015, 02:38 PM
RE: Who knows how to use a slide rule?
(20-12-2015 01:53 AM)Chas Wrote:  I was wearing my Breitling Navitimer this evening. It has a rotating bezel marked with a logarithmic scale and the dial has one as well.
Together, these form the C and D scales of a circular slide rule.

[Image: 81600g.jpg]

It got me to wondering who else here knows how to use a slide rule? Consider

I used to be quite good at it, but it has been decades and i don't know how I'd be with one now.
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