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Posted: 12/25/2001 4:26:49 PM EDT
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To my understanding Minute Of Angle mean's 1 inch at 100 yard's. So at 200 yard's is 1 minute of angle going to be 2 inch's and 3 inch's at 300 yard's and so on? Lee |
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Here's a brief rundown www.snipercountry.com/mil-moa.html Here are some tools www.shooterready.com try the level one demo www.mildotmaster.com |
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Minute of Angle is a math term. A circle has 360 degrees A degree has 60 minutes (a minute has 60 seconds, ignore for this thread) 100 yards has 300 feet There are 12 INCHES to the foot. At 100 yards, MOA equals: (300*12)sin 1/60 Which is,as you have noted, about 1 inch at 100 yards, 2 at 200, 3 at 300, etc. Here endeth the geometry/trig lesson.  SRM Edit to change brainfart |
Erasmus, with cloning upon us a properly designed terrorists bent on destroying an airplane might just have "12 feet to the foot" that would make "24 feet to the two feeters........" |
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For all intended purposes on this forum MOA is minute of angle and does equate to 1” @ 100 yards. That being said in true mathematical terms, 1 minute of angle at 100 yards (300 feet) is in actuality 0.08726646 (decimal of a foot). As an inch is represented as 0.08333333 (decimal of a foot), one can see that a true MOA is in 1.004 thousandths of an inch. This is arrived at by use of the “Law of Sins” 300 (100yards express in feet) / sin 89°59’ = X (distance unknown) / sin 00°01’ Multiply 300 feet times the sin of 00°01’ (0.00029089) = 0.08726646 Then divide 0.08726646 by the sin of 89°59’ (0.99999996) = 0.08726647 0.08726647 (true MOA) subtract 0.08333333 (true decimal equivalent of an inch) = 0.00393313 or 0.004 thousandths of and inch, which for all but the engineering purposes is dropped. You can tell I’ve had nothing else to do at lunch today. Mike |
 I have math anxiety. Now I have a headache and you almost killed my last surviving brain cell. |
Mr._Wilson, for the good of all, please, please eat !! All this talk about "sins" and stuff - there's enough of that on the other board ! You've got Dave223 bragging that "his" math has anxiety while my math doesn't even know enough to be worried! I do have one advantage over the both of you ...I'm assured that an empty vessel cannot ache. (Law-of-the-Empty-vessel) 
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my fiance is an engineer (aero) and he can't do basic math without a calculator. seriously, i can add things up faster in my head than he can type them out on the calculator. |
Hey, you guys (and you too ARlady) who like this math stuff should pay a visit to this thread, where we discuss atomic theory.  www.ar15.com/forums/topic.html?id=80298 |
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