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Old 09-14-2017, 06:31 PM   #21
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Default Re: Metric dimensions please

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Originally Posted by surlyoldbill View Post
Well, we don't want to interrupt trade with those two other economic powerhouses that use SAE/Imperial measurements: Liberia and Myanmar. Along with the USA, that makes 3 countries in the entire world that don't use metric as the official measurement system.
In the UK, speed limit signs (and speedometers) are still in MPH.

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Old 09-14-2017, 07:08 PM   #22
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Default Re: Metric dimensions please

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Originally Posted by sprint2freedom View Post
~4000 km on the diagonal, ... ~323 million people


I like measuring the physical size of the US in kilometers. Nice touch.

But shouldn't we also measure population with a proper metric prefix? Wouldn't that be 323 megapersons?

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Old 09-14-2017, 07:44 PM   #23
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Default Re: Metric dimensions please

If North America adopted the kilometer, they would probably come up with their own value for it like the US inch and US gallon :-)
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Old 09-14-2017, 07:50 PM   #24
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Default Re: Metric dimensions please

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Originally Posted by autostaretx View Post
In the UK, speed limit signs (and speedometers) are still in MPH.

--dick
That's true, although some vehicles have metric speedometers which is perfectly legal.
I'm always fighting with my settings in my NCV3 to give me just metric, but it defaults to Imperialistics on reset.
Also, it's impossible to buy a steel rule with just metric which is yet another bugbear
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Old 09-15-2017, 02:15 AM   #25
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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.
Well at 25.42mm to an inch (1.00") then 2 inch sections would be 50,82mm.
Hence the imperial width is (0,83mm) or 0.3 of an inch. "Difference".
Now I can understand if you were an MOD contractor making beds for the RN malott's below decks on that new aircraft carrier we can hardly afford but building a bed in a Sprinter van using metric section angle is going a bit bloody far!
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Old 09-15-2017, 02:36 AM   #26
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Default Re: Metric dimensions please

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Well at 25.42mm to an inch (1.00")
Ummm... the US inch is precisely 25.4 mm ... not 25.42

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Old 09-15-2017, 11:10 AM   #27
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Default Re: Metric dimensions please

An Inch can be either 25.400051mm or 25.4mm or a twelfth of a barleycorn depending on its historical context.
lindenengineering, I think you make my point very well. 2" would be 50.84mm by your version of an inch, not 50.82mm
Wasn't the reason a space shuttle's ceramic tiles failed as a result of these disparities?
I appreciate that my NCV3 isn't going into orbit any time soon, but as a matter of engineering principle, I don't want to sully my European van with arbitary dimensions.
We all of us as engineers have to take a stand on this and leave the mess which was imperial behind us.
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Old 09-16-2017, 01:45 AM   #28
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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
Well Tekno you jogged my few memory cells left and I went to my workshop and checked out an item I have had hanging on the wall above the work bench for at least methinks for the last 10 to 15 years which I bought at a garage sale (not sure if you Guys have them in your neck of the woods).

Anyways the item is in pristine condition and was still in its original plastic sleeve.

Might be of interest to somebody: Made in England and all the measurements are metric.
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File Type: jpg DSC_0017 2.jpg (85.2 KB, 28 views)
File Type: jpg DSC_0020 3.jpg (101.8 KB, 29 views)
File Type: jpg Metric ruler 001.jpg (114.8 KB, 29 views)
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Old 09-16-2017, 02:33 AM   #29
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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
Seriously?
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Old 09-16-2017, 03:33 AM   #30
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Default Re: Metric dimensions please

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Originally Posted by Tekno Tone View Post
An Inch can be either 25.400051mm or 25.4mm or a twelfth of a barleycorn depending on its historical context.
lindenengineering, I think you make my point very well. 2" would be 50.84mm by your version of an inch, not 50.82mm
Wasn't the reason a space shuttle's ceramic tiles failed as a result of these disparities?
I appreciate that my NCV3 isn't going into orbit any time soon, but as a matter of engineering principle, I don't want to sully my European van with arbitary dimensions.
We all of us as engineers have to take a stand on this and leave the mess which was imperial behind us.
One of my clients was the head of the NASA ceramics department at the time of the crash; the SAE/Metric disparity is new to me, I'll have to ask her about that!
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