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Old 09-16-2017, 04:16 AM   #31
autostaretx
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Default Re: Metric dimensions please

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Originally Posted by Tekno Tone View Post
Also, it's impossible to buy a steel rule with just metric which is yet another bugbear
Come to the US:
https://www.amazon.com/Stainless-Raf.../dp/B0753DV19V
https://www.amazon.com/Shinwa-Stainl.../dp/B00LY9ZCQS
https://www.amazon.com/Shinwa-Stainl.../dp/B00LYA3OBC
https://www.amazon.com/Stainless-15x.../dp/B071JNYNHT
https://www.amazon.com/Swanson-NA202.../dp/B000IOCN8U
https://www.amazon.com/Metric-Alumin.../dp/B071G7ZGKY
... that last one is cute: the description calls it a 7 inch ruler, but all gradations on the ruler are metric.


--dick
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Last edited by autostaretx; 09-16-2017 at 04:21 AM.
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Old 09-16-2017, 03:05 PM   #32
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Default Re: Metric dimensions please

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Originally Posted by Tekno Tone View Post
When I was building my bed in my Sprinter camper van conversion, I spent hours online and on the phone trying to find a metal stockist who had or could get 50x50mm 'L' section aluminium.
I was forced to give up in the end and use 2"X2". My only other option was to import from Germany.
It's has gotten better here in the US. I can now get metric sized metal in the Heartland. Just 5 years ago it was hard. I still have to pay a premium for it, but the difference is much less now.

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Originally Posted by Tekno Tone View Post
If North America adopted the kilometer, they would probably come up with their own value for it like the US inch and US gallon :-)
We had out own because at the time nobody thought to use international standards. Even across Europe there were different standards.

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Originally Posted by Tooth Fairy View Post
Yeah, seriously. I wanted to use metric rules because I like the system better. Couldn't get any pure metric ones here in the USA until the past decade. If you did find one it was likely the text was in a foreign language. Back in the early '90s I did get a set of French ones given to me by a friend from Switzerland. Sadly they are worn out.

Using CAD programs has really changed things. I'll admit I'm a luddite with CAD. I start with paper. To get me to go 100% cad would take an easily portable display/computer of roughly A4 size with 100+ pixels per cm resolution that I can use a pen like mouse directly on the screen. We're getting there, if it hasn't already showed up and I missed it. My current 7" diagonal tablet has too low of resolution, and it's screen is to small. There are drawing tables with built in displays, but they aren't portable.
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Old 09-26-2017, 01:01 PM   #33
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Default Re: Metric dimensions please

Thanks to those who can see the light. It is good to see that the space program has converted to the metric system. The recent space mission just completed with astonishing precision involved all continents tracking the space craft working with the metric system, A joy to behold. Eric.
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Old 09-26-2017, 03:50 PM   #34
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Default Re: Metric dimensions please

Space mission! Remembering the Hubble telescope mirror. The reflective surface was created using the wrong unit of measure.
I believe it was Polished here in Richmond, .. polished to a never befor achieved smoothness. They compaired the mirror surface too .. if the Earth was polished to the same compaired ratio, all of the earths mountains/ imperfections would be ground down, reduced to a surface height of 3 inches.

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Old 09-27-2017, 11:32 AM   #35
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Default Re: Metric dimensions please

CJPJ.
You nearly got it. The earth would be flat to 75mm. Eric
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Old 09-27-2017, 03:25 PM   #36
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Default Re: Metric dimensions please

^
Eric l would've never thunk that you are one of those flat earthar types


: I believe the mirror surface needed to be polished to a accuracy of a small fraction of lights wavelength. As a "ruler" they used red laser light; its divisions are the light's wavelength — about 630 nanometers — and it can be read to about one hundredth of a division.
__________________________________________________ __________

Space exploration has had some serious setbacks. One of the most often mentioned is the Hubble Space Telescope.
The drama of that fiasco is a human and organizational tapestry perhaps more complex than the technology involved. The account that follows is excerpted from a Pulitzer Prize-winning series.

http://people.tamu.edu/~v-buenger/658/Hubble.pdf

Golly!

Last edited by CJPJ; 09-28-2017 at 01:10 AM.
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