Mailing List lml@lancaironline.net Message #44682
From: Colyn Case on earthlink <colyncase@earthlink.net>
Sender: <marv@lancaironline.net>
Subject: beam spread table
Date: Sat, 03 Nov 2007 10:06:12 -0400
To: <lml@lancaironline.net>
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If I did the math correctly, this is what you get from the 3 ansi designations for lights.
 
  beam spread (degrees) tan(beam spread) beam width at 100' (feet) beam width at 200' (feet) beam width at 300' (feet) beam width at 500' (feet)
ideal taxi? 30 0.577 58 115 173 289
ideal landing? 10 0.176 18 35 53 88
eyf 12 0.213 21 43 64 106
eyj 25 0.466 47 93 140 233
eyc 40 0.839 84 168 252 420
 
 
fix your own spreadsheet attached
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