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

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

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

There are *not* 12 feet to the foot.

(In a small, uncertain voice) "are there?"

Quoted: There are *not* 12 feet to the foot. (In a small, uncertain voice) "are there?"

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........"

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

Quoted: 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’ (1.00000000) = 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.

Quoted: one can see that a true MOA is in 1.004 thousandths of an inch.

1.004 thousandths of an inch or 1.004 inches?

Quoted: Quoted: one can see that a true MOA is in 1.004 thousandths of an inch. 1.004 thousandths of an inch or 1.004 inches?

Yeah that's fine "ARLady" but how many footers-to-the-feeter does that equal ?


(Somehow there just needs to be a capital "L" in "ARLady.")

1.004 inches, sorry I wrote it wrong, either way it's not much over an inch.

Thanks dave223, I spit coke all over my keyboard
LMAO.

Mike

Quoted: Quoted: 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’ (1.00000000) = 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)

Quoted: There are *not* 12 feet to the foot. (In a small, uncertain voice) "are there?"

LMAO!!

That's why you should keep calculators away from engineers!!

SRM

Thank's for the understandable and the un-understandable (way over my head)answer's.It's alway's fun to see how people respond to a question.

Lee

Quoted: Quoted: There are *not* 12 feet to the foot. (In a small, uncertain voice) "are there?" LMAO!! That's why you should keep calculators away from engineers!! SRM

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