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When a different kind of "tunnel vision" is a good thing

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Etmax
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re: When a different kind of "tunnel vision" is a good thing
Etmax   10/27/2010 1:10:02 PM
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Maybe they did the 19th century tunnels by starting at one end so that the error was more manageable? If not, I sure would like to know how they did it.

sharps_eng
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re: When a different kind of "tunnel vision" is a good thing
sharps_eng   10/20/2010 8:33:48 PM
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A smple railway near my home was recently surveyed and they found a 15deg curve which was precisely placed on a radius of several tens of miles. The railway was built in the 1840s. I feel humbled by this kind of Real Engineering.

Dr. Phil
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re: When a different kind of "tunnel vision" is a good thing
Dr. Phil   10/19/2010 1:50:23 AM
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I felt kinda sheltered, not knowing that this tunneling project was even going on. This is persistence! Congrats to the Swiss! Amazing how the quiet and persistent accomplish so much.

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