[simpits-tech] Why Gene shouldn't do math.

[David C. Allen]

Gene
I come up with three 110 inch screen segments each at 75 degrees for 
a total screen angle of 225 degrees with a radius of 90.3474 inches 
or a diameter of 180.6948 inches or 15.0579 feet

David
www.737FlightSim.com

At 02:17 PM 6/18/2010 -0700, you wrote:

>I suspect you've all seen my absurdly large screen by now.  If not,
>behold:
>
>http://www.simpits.org/geneb/wp-content/uploads/2010/06/six-segments-3.jpg
>
>That screen is six of the 8 segments needed to build a 180 degree screen
>that's right around 24' in diameter.
>
>The size of that thing has been bugging me ever since I built it.
>
>I started working through the figures again.  Yell if I screw it up
>(again):
>
>Each projector can display a 110" wide image.  Three of them would require
>a screen 330 inches wide.  Now I want to display this on a screen that
>covers a field of view that's 180 to 225 degrees.
>
>Now going on the assumtion that those 330 inches of screen would be pretty
>close to a circle that's 660 inches in circumference, right?  Right.
>
>So a circle that's 660 inches in circumference works out to a diameter of
>roughly 210 inches or 17.5 feet.
>
>I can honestly say that I have no farking clue where I came up with a
>screen diameter of 24 feet.  It must have been a math induced brain fever
>or something.
>
>Back to the drawing board I go....
>
>g.
>
>
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