RE: [gingery_machines] Chord height Was new article: Making it Dead Flat and Square

 

Dick,

I never thought of that but it does make sense. Gravity will be pulling straight towards the center of the earth so the water is coating the earth. So if the Egyptians wanted their pyramid to also follow the curvature of the earth, then this would not be an issue ;-))

Rick

-----Original Message-----
From: gingery_machines@yahoogroups.com [mailto:gingery_machines@yahoogroups.com] On Behalf Of R.L. Wurdack
Sent: Saturday, January 01, 2011 11:56 AM
To: gingery_machines@yahoogroups.com
Subject: Re: [gingery_machines] Chord height Was new article: Making it Dead Flat and Square

Water is not quite flat. For a 1000 foot chord, the diagonal of the base,
the chord height due to the curvature of the Earth is nearly 0.1 inches. (1
part in 120,000 - half the error budget for 1/8 inch in 700 feet.) The point
I'm trying to make is that 1 part in 1000 is difficult, 1 part in 10000 is
tough and 1 part in 100000 is messing with physics.

Dick

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