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#301 2019-09-16 07:41:36

GW Johnson
Member
From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 3,653
Website

Re: Apollo 11 REDUX

Mine was a K&E Deci-Lon.  Never wore it on my belt,  but I carried it with my notebook and texts everywhere as an engineering student.

I still have it.  It's the back-up when the electronics fail.  And they do.

GW


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

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#302 2019-09-16 12:14:20

tahanson43206
Member
Registered: 2018-04-27
Posts: 1,072

Re: Apollo 11 REDUX

For OldFart1939 and GW Johnson ....

If you are interested, it may be possible to incorporate Slide Rule lore in a web site that might be created to provide mission planning for Asteroid Mining.

There are (probably) a billion computer programmers on Earth today, or will be soon.  There are only a tiny number of human beings alive who encompass the knowledge and skills you've described in this forum.

GW Johnson, you have indicated on several occasions that computer skills are not something you've invested in, but my counter to that is that people who could translate your vision of a web site to provide click-click generation of mission profiles are available in great numbers.

What I'm thinking about here is that in addition to the simple calculator-like functions a web site could provide, there could exist a capability of showing images of slide rules positioned appropriately at each stage of a calculation.  Such a display would be a lasting educational opportunity for future generations who might want to learn about an analog computing method which can be relied upon when electronics fails,

I'm not talking about an "instant" development project.  The original concept I had in mind would take a year (with all volunteers), and this new feature would easily add a year.

But as said previously, I don't see a need for expenditure of funds by any of the (hoped for) participants, except as might be inspired by the project, for purchase of books or scientific calculators or (gasp) even slide rules.

This would need to be sponsored by SpaceNut, who would need to negotiate with the Mars Society for computer resources, and for guidelines on what such a web site might look like, to adhere to Mars Society expectations for look-and-feel, performance and perhaps other factors.

(th)

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#303 2019-09-16 16:23:40

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,719

Re: Apollo 11 REDUX

Actually, there is still one segment of the population still learning to use a slide rule, and that's anyone wishing to become a private pilot. Using the E6b circular slide rule-flight calculator. Granted, it doesn't have all the bells and whistles of the high-end slip sticks, such as log scales and fancy trig scales, but for doing point-to-point navigation, they are hard to beat.
BITD, a really GOOD slide rule could cost $60.00! I had a Post slide rule, because they were a stark white color, and were easier to read thand the K & E slip sticks. Mine was stolen a few years ago, but I guard my Texas Instruments Scientific Calculator with my life! (TA-30XA). This is now becoming something of an historical artifact, too.

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#304 2019-09-16 19:30:18

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 16,181

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#305 2019-09-16 19:47:13

tahanson43206
Member
Registered: 2018-04-27
Posts: 1,072

Re: Apollo 11 REDUX

For SpaceNut re #304 ... the tinas link was quite interesting.  Go down far enough and you'll find a UK Monarchy family tree calculator << grin >.

I found one used logarithmic slide rule on offer on Amazon for $120.

However, ebay is where I found an (amazing to me) list of Soviet or 1960's era slide rules, and even a World War II German slide rule.

However, no one appears to be making new slide rules.

The Scientific Calculator is the ubiquitous replacement, no doubt.

(th)

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#306 2019-09-16 21:23:23

kbd512
Moderator
Registered: 2015-01-02
Posts: 2,962

Re: Apollo 11 REDUX

Oldfart1939,

The paper charts and E6B's are better than nothing if that's all you have, but we much prefer ForeFlight.  I know some of our old timers are interested in returning to the way things were in the good 'ole days, but there was nothing all that great about the navigation technology of the time.  I can guarantee that your TI-30XA has nothing on the graphing calculator apps for the iPhone and iPad.

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#307 2019-09-16 22:10:52

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,719

Re: Apollo 11 REDUX

kbd512-

I still have my E6b, but it's a replacement,  an electronic version. I normally navigate when flying using a Garmin 530W interfaced to a Century 21 Autopilot with STEC altitude control. Yeah, I can still use the paper charts, too. I can navigate from VOR to VOR, my preferred means of navigation, on the Victor Airways.

I'm not mired in the past.

P.S. I also have an iPad and an iPhone. Two laptops, each with a Terabyte of memory and 8 GB RAM.

Last edited by Oldfart1939 (2019-09-16 22:13:11)

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#308 2019-09-17 11:13:03

GW Johnson
Member
From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 3,653
Website

Re: Apollo 11 REDUX

My old C-170 has a good radio and a VOR and a transponder.  An antique like that is actually more fun to fly the old way with a paper chart and a circular slide rule.  While it can be flown IFR,  that's not near as much fun as day VFR.  It's way faster than a Piper Cub,  but not so fast you really need the sophisticated electronics that can crap out on you.

I never had to reboot a book or a slide rule.  I have to reboot computers all the time.

GW


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

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#309 2019-09-17 17:00:40

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 16,181

Re: Apollo 11 REDUX

So where are we with a lunar lander....

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#310 2019-09-18 16:56:42

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,719

Re: Apollo 11 REDUX

My "take" on project Artemis is that it's not progressing on schedule. Inclusion of this LOP-G is a joke, creating as Bob Zubrin calls it, a "tollbooth." Pay the toll to Old Space and favored contractors. Blue Origin needs to begin stepping up with their lander and actually build one!

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#311 2019-09-18 19:33:57

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 16,181

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