[AT] Supposedly why our old tractors are not metric and a fairly simple tutorial

[Cecil Bearden]

It is bad enough converting degrees minutes and seconds into decimal 
degrees!!
Cecil

On 2/24/2020 4:23 PM, Stephen Offiler wrote:
> I haven't see Mark's message yet, but I just saw Cecil's reply.  Yes, 
> I am aware of that (not the cornbread!). In fact, most scientific 
> calculators have a "D-R-G" button that puts the calc into either 
> degree mode, radian mode, or grad mode.  A grad is 1/400 of a circle.  
> I must admit I wasn't recognizing this as quite metric.  But Mark is 
> right - it would be a metric right triangle with 100 divisions.  I 
> have never encountered the actual use of grads anywhere outside an 
> obscure trigonometry class once upon a time.  So I still submit that 
> in practice neither the circle nor time are metric.
>
> SO
>
>
> On Mon, Feb 24, 2020 at 4:43 PM Cecil Bearden <crbearden at copper.net 
> <mailto:crbearden at copper.net>> wrote:
>
>     Does this mean that we use cornbread for a factor instead of PI?
>     Cecil
>
>     On 2/24/2020 2:09 PM, Mark Johnson wrote:
>>     There is an 'alternative' degree system where a full circle is
>>     400 degrees and a right angle is thus 100 degrees instead of 90.
>>     I haven't played with the math implications, but it seems logical
>>     that all triangles in such a system would have angles adding up
>>     to 200 degrees.
>>
>>     The trig tables would look a bit strange at first but I think all
>>     the identities will work regardless of the metric.
>>
>>     Mark J
>>
>>     ------------------------------------------------------------------------
>>     *From: *"Stephen Offiler" <soffiler at gmail.com>
>>     <mailto:soffiler at gmail.com>
>>     *To: *"Antique Tractor Email Discussion Group"
>>     <at at lists.antique-tractor.com> <mailto:at at lists.antique-tractor.com>
>>     *Sent: *Monday, February 24, 2020 8:32:41 AM
>>     *Subject: *Re: [AT] Supposedly why our old tractors are not
>>     metric and a fairly simple tutorial
>>
>>     Metric time?  Say 10 metric hours per day, 100 metric minutes per
>>     hour... why don't we do that?
>>     Metric circles?  Why not divide into 100, or 1000 parts rather
>>     than 360?
>>
>>     SO
>>
>>     On Mon, Feb 24, 2020 at 9:09 AM Indiana Robinson
>>     <robinson46176 at gmail.com <mailto:robinson46176 at gmail.com>> wrote:
>>
>>         I'm not sure how accurate this story is but it matches what I
>>         had read for years.
>>         https://www.thevintagenews.com/2018/04/12/metric-system-usa/
>>
>>         If they had listened to Jefferson we would not be messing
>>         with a double system, metrics would just be what we use... 
>>         The 10 based system can be done in  your head (could have
>>         saved all those years learning those damned fractions)  :-) 
>>         and every tool box wouldn't have a fraction to decimal
>>         conversion chart tucked in somewhere that you can't ever find
>>         when you need it. Also we would not have to worry about some
>>         dead kings thumb size getting lost or a bad few years for the
>>         barley crop or a lot of other stuff they tried to set as
>>         standards long ago.
>>
>>         This site looks fairly well done and I liked the little
>>         section on the metric size of a few common objects.
>>         https://www.wikihow.com/Measure-Centimeters?fbclid=IwAR1z77b9GTGRpTD7TM1cH51LA1CKzsTyPJ-n87HsRDmbJv7b5ME7QyCVpbs
>>
>>         If you have forgotten how to use your Abacus there is a
>>         section on that too.  :-)
>>
>>
>>         .
>>
>>         -- 
>>         -- 
>>
>>         Francis Robinson
>>         aka "farmer"
>>         Central Indiana USA
>>         robinson46176 at gmail.com <mailto:robinson46176 at gmail.com>
>>
>>
>>
>>
>>
>>
>>
>>
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