I need a cosine chart for angle shooting that i can copy and paste out of the browser ito notepad or wordpad. Trying to get some data consolidated. And if somebody could help what is the average speed of a running target? i believe it is 8-10fps maybe 10-12fps, if you know the answer i would appreicate it. thanks for your time.
Advanced Marksmanship cosine chart needed
- Thread starter twat_daddy
- Start date
Re: cosine chart needed
Excel has a cosine function. If you don't have a spreadsheet program, there's an online calculator here:
http://www.calculator.com/calcs/calc_sci.html
Just enter the angle, in degrees, and hit the "COS" button.
There is also a cosine table here:
http://www.grc.nasa.gov/WWW/K-12/airplane/tablcos.html
Moving targets don't have an average speed.
A slow walk is about two miles per hour. A fast walk is about four miles per hour. A person running an 8-minute mile is running about 7.5 miles per hour.
To calculate that in fps, multiply the MPH figure by 1.47.
Excel has a cosine function. If you don't have a spreadsheet program, there's an online calculator here:
http://www.calculator.com/calcs/calc_sci.html
Just enter the angle, in degrees, and hit the "COS" button.
There is also a cosine table here:
http://www.grc.nasa.gov/WWW/K-12/airplane/tablcos.html
Moving targets don't have an average speed.
A slow walk is about two miles per hour. A fast walk is about four miles per hour. A person running an 8-minute mile is running about 7.5 miles per hour.
To calculate that in fps, multiply the MPH figure by 1.47.
Re: cosine chart needed
Lindy do you know of (or how to setup in excel) a "flight time" calculator that accounts for the projectile slowing in flight?
Lindy do you know of (or how to setup in excel) a "flight time" calculator that accounts for the projectile slowing in flight?
Re: cosine chart needed
You need a ballistics program for that. Here's one in Excel:
http://www.jacksonrifles.com/files/pejsa%20ballistics.xls
You need a ballistics program for that. Here's one in Excel:
http://www.jacksonrifles.com/files/pejsa%20ballistics.xls
Re: cosine chart needed
not sure how helpful to your purpose this is but a mediocre sprinter (4.8 sec 40yards) equates to about 25fps. far as cosine goes get a scientific calculator(solar powered preferably) for your kit.
not sure how helpful to your purpose this is but a mediocre sprinter (4.8 sec 40yards) equates to about 25fps. far as cosine goes get a scientific calculator(solar powered preferably) for your kit.
Re: cosine chart needed
The Mildot Master also includes the angled firing solution function.... No batteries required! Or, an ACI with a little mental math will get you there even quicker for field expedient uses...
The Mildot Master also includes the angled firing solution function.... No batteries required! Or, an ACI with a little mental math will get you there even quicker for field expedient uses...
Re: cosine chart needed
these are the figures used by the US army marksmanship unit / US shooting team
ANGLE> 0 1-8 9 10 11 12 13 14 15 16 17 18
COSINE> 1 .99 .98 98 .98 .97 .97 .97 .96 .96 .95 .95
ANGLE> 19 20 21 22 23 24 25 26 27 28 29 30
COSINE> .95 .94 .93 .93 .92 .91 .9 .89 .89 .89 .87 .86
ANGLE> 31 32 33 34 35 36 37 38 39 40 41 42
COSINE> .86 .84 .84 .82 .82 .80 .80 .78 .78 .78 .75 .74
ANGLE> 43 44 45 46 47 48 49 50 51 52.5 55
COSINE> .73 .72 .70 .69 .68 .67 .65 .64 .605 .605 .57
ANGLE> 57.5 60 62.5 65 67.5 70 72.5 75
COSINE> .53 .5 .46 .42 .38 .34 .30 .26
ANGLE> 77.5 80 90
COSINE> .215 .17 0
YARDS X COSINE=ACTUAL YARDAGE TO USE IN THE FIELD TO MAKE SLOPE ADJUSTMENTS
example: 500 yards at a 25 degree angle = .9 cosine value, or..
500 x .9 = 450 yards
these are the figures used by the US army marksmanship unit / US shooting team
ANGLE> 0 1-8 9 10 11 12 13 14 15 16 17 18
COSINE> 1 .99 .98 98 .98 .97 .97 .97 .96 .96 .95 .95
ANGLE> 19 20 21 22 23 24 25 26 27 28 29 30
COSINE> .95 .94 .93 .93 .92 .91 .9 .89 .89 .89 .87 .86
ANGLE> 31 32 33 34 35 36 37 38 39 40 41 42
COSINE> .86 .84 .84 .82 .82 .80 .80 .78 .78 .78 .75 .74
ANGLE> 43 44 45 46 47 48 49 50 51 52.5 55
COSINE> .73 .72 .70 .69 .68 .67 .65 .64 .605 .605 .57
ANGLE> 57.5 60 62.5 65 67.5 70 72.5 75
COSINE> .53 .5 .46 .42 .38 .34 .30 .26
ANGLE> 77.5 80 90
COSINE> .215 .17 0
YARDS X COSINE=ACTUAL YARDAGE TO USE IN THE FIELD TO MAKE SLOPE ADJUSTMENTS
example: 500 yards at a 25 degree angle = .9 cosine value, or..
500 x .9 = 450 yards
Re: cosine chart needed
www.nfa.ca/content/view/58/82/#BRC free balistic program at bottom of page if you have Excel see tabs at bottom of excel page. I would be interested in your opinion
www.nfa.ca/content/view/58/82/#BRC free balistic program at bottom of page if you have Excel see tabs at bottom of excel page. I would be interested in your opinion
Re: cosine chart needed
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">YARDS X COSINE=ACTUAL YARDAGE TO USE IN THE FIELD TO MAKE SLOPE ADJUSTMENTS</div></div>
For small angles at short distances, that's OK. Not at longer distances.
Better is called the Improved Rifleman's Rule: take your dope for the actual distance, and multiply that by the cosine of the angle.
For references, see:
Angled Fire Explained
There is a more accurate method in that reference, but it's only needed for steep angles at really long distances.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">YARDS X COSINE=ACTUAL YARDAGE TO USE IN THE FIELD TO MAKE SLOPE ADJUSTMENTS</div></div>
For small angles at short distances, that's OK. Not at longer distances.
Better is called the Improved Rifleman's Rule: take your dope for the actual distance, and multiply that by the cosine of the angle.
For references, see:
Angled Fire Explained
There is a more accurate method in that reference, but it's only needed for steep angles at really long distances.
