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# Cosine indicator question

#8
06-08-2008, 09:52 PM
 Platinum Member Join Date: Feb 2005 Location: USA Posts: 2,598
The only method that is 100% accurate is to run the angle through Exball, IHMO
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range it,check the wind, dial in correction, aim and only one shot
#9
06-09-2008, 03:16 PM
 Gold Member Join Date: Sep 2003 Location: Blighty Posts: 637
Quote:
 Originally Posted by dmgreene Brown Dog are you sure this is correct or am I misunderstanding what you are saying? If you shoot at a target that is at a 90 degree angle up or down then theoretically you don't have any drop from the line of sight do you? David

(worth pointing out that what I'm calling 'drop' is actually the vector resulting from the force/time/acceleration etc of gravity -just easier to illustrate the example by grouping them into 'easy' language -'drop'. Sticking with easy language, for a vertical shot, the drop is straight back down the path of the bullet (in vector terms it will, therefore be a decceleration.)

The only way to reduce the effect of gravity is to get in a space ship

Last edited by Brown Dog; 06-09-2008 at 03:27 PM.
#10
06-09-2008, 03:18 PM
 Gold Member Join Date: Sep 2003 Location: Blighty Posts: 637
Quote:
 Originally Posted by jwp475 The only method that is 100% accurate is to run the angle through Exball, IHMO

How do you think Exbal is calculating it??!

I'll eat my hat if it isn't applying the cos of the angle to the bullet's drop.

Last edited by Brown Dog; 06-09-2008 at 03:44 PM.
#11
06-09-2008, 10:26 PM
 Silver Member Join Date: May 2007 Location: Alabama Posts: 157
BD I guess what I'm trying to say is that most of us (or at least I do) consider drop to be the departure of the bullet flight path from the line of sight. I know that gravity will still affect the bullet no matter what, but the steeper the angle the straighter the bullet path will be. I not saying your wrong, I just didn't understand what you were calling drop.

David
#12
06-09-2008, 11:10 PM
 SPONSOR Join Date: Dec 2002 Location: California Posts: 171
Angle Cosine Indicator Calculation method and Night Force Ballistic Targeting softwar

Hello Sir (Brown Dog):

We are still around, aren't we? Have wondered what you have been up to and if you have remained in the UK.

Anyway, I just sent in an article that I wrote regarding Night Force Ballistic Targeting software. It should post soon and I think that you will like it.

All my Best,

-Ward
#13
06-10-2008, 12:24 AM
 Platinum Member Join Date: Jan 2008 Location: West Central Idaho Posts: 1,218
Great post and really good answers. Information like this is the reason I keep checking this forum. Sure appreciate the people who are in the know for the time you spend answering the complicated questions.

When I was a kid I was taught to pull a little low when shooting up or down hill. I can honestly say that I now know why one does and can figure exactly where to aim.
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Jim

There is something about the outside of a horse that is good for the inside of a man. Sir Winston Churchill.

Everything that is really great and inspiring is created by the individual who can labor in freedom. Einstein
#14
06-10-2008, 01:33 AM
 Gold Member Join Date: Sep 2003 Location: Blighty Posts: 637
David,

Sounds as though we're violently agreeing

Ward,

Dropped you a PM.

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