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HP Forum Archive 15

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11C aspect ratio
Message #1 Posted by Dave Chapman on 27 July 2005, 1:39 p.m.

Has anyone mentioned that the apsect ratio of the 11C and similar calculators is almost exactly the Golden Ratio, (Sqrt[5]+1)/2 ?

      
Re: 11C aspect ratio
Message #2 Posted by Howard Owen on 27 July 2005, 2:09 p.m.,
in response to message #1 by Dave Chapman

In nature when this shows up, we say it's the result of underlying physical processes that embody the mathematics that produce the ratio. In a calculator designed by HP in Corvalis, we'd have to say it's the result of underlying humor by mathematics geeks embodying the spirit of great engineering.

Where'd all that stuff go to, anyway?

            
Re: 11C aspect ratio
Message #3 Posted by don wallace on 28 July 2005, 3:38 a.m.,
in response to message #2 by Howard Owen

Hi all. IMHO, it's just (yet) another beautiful touch by the designers to enhance the visual beauty of the product. . .

      
Re: 11C aspect ratio
Message #4 Posted by Vieira, Luiz C. (Brazil) on 27 July 2005, 2:50 p.m.,
in response to message #1 by Dave Chapman

Hi, Dave;

some time ago, Gerson mentioned this very fact in here. I tried to search the aschives but did not find it. If Gerson read this thread he'll probably remember when did he post it.

Sorry not being more precise about the message itself.

Best regards.

Luiz (Brazil)

            
Re: 11C aspect ratio
Message #5 Posted by Gerson W. Barbosa on 27 July 2005, 6:13 p.m.,
in response to message #4 by Vieira, Luiz C. (Brazil)

Hi Luiz,

I coudn't find the post either. In short, the length/width ratio in the Voyagers is 12.7cm/7.87cm = 1.6137 very close to 1.6180 [Sqrt(5)+1]/2. In inches, 5"/3.1" = 1.6129. These are official specifications listed at:

http://www.hp.com/calculators/financial/12c/specs.html

Actually, the first one to have mentioned this here was John Ioannidis:

http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=170

Now we know what the Parthenon and the Voyagers have in common: the golden ration. No wonder they are so wonderful!

Cheers,

Gerson.

      
Re: 11C aspect ratio
Message #6 Posted by bill platt on 27 July 2005, 3:55 p.m.,
in response to message #1 by Dave Chapman

No wonder it is so beautiful!


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