For efficiency purposes............the Cascades are perfect...........close to the Pacific ocean...........and for the Earth's curvature.......................perfect as well......open at the tops already...

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Standard Handbook of Industrial Automation

https://books.google.com/books?isbn=1461319633

Douglas M. Considine, ‎Glenn D. Considine - 2012 - ‎Technology & Engineering

Diagrammatic view of the SynchroSteps disc-rotor stepper motor. ... The compensated curve DB, on the other hand, which is biased for ... 22 and 23 utilizes a rare-earth permanent-magnet disc rotor with magnetically impressed poles and ...

Flat Earth Insanity: Flat Earth Follies: High Altitude Balloon footage ...

https://flatearthinsanity.blogspot.com/2016/08/flat-earth-follies-high-altitude.html

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Aug 9, 2016 - Flat Earth Follies: High Altitude Balloon footage PROVES Flat Earth ... And since the downward curved horizon would entirely fall in the ... more and more 'smushed' the steeper the angle at which we view it. ..... Why do no commercial flights ever cross over Antarctica to go from South America to Australia?

Could You See the Curvature of the Earth in this Airport? | WIRED

https://www.wired.com/2014/03/see-curvature-earth-airport/

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Mar 4, 2014 - ... be easier to build. How much does the Earth's surface curve over this distance? ... It's wider at the equator than at the poles. Just for simplicity ...