Free Ballistics Program I Wrote
- Thread starter ApplePie
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ApplePie
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Wow, I've been shooting for almost 50 years and I never heard of spin drift before. Interesting; thanks for this bit of knowledge.
I think when Andrew mentioned that speeds should be km/h he was referring to the 10mph wind drift column in my calculator. He said he'd like velocities to remain in fps. Therefore I would just label the right-most column "16 kmh crosswind deflection (cm)" so I don't have to deal with a calculation change.
I already thought I should give a choice for each unit of measure. However, after reading Andrew's post, I'm wondering if anyone really needs to see speeds in anything other than fps.
I think when Andrew mentioned that speeds should be km/h he was referring to the 10mph wind drift column in my calculator. He said he'd like velocities to remain in fps. Therefore I would just label the right-most column "16 kmh crosswind deflection (cm)" so I don't have to deal with a calculation change.
I already thought I should give a choice for each unit of measure. However, after reading Andrew's post, I'm wondering if anyone really needs to see speeds in anything other than fps.
Nature Boy
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Playing around with it. Love the simplicity. It's pretty close to my real world adjustments
ApplePie
Member
Metric measurements
I've now changed my ballistics program to also handle some metric measurements, according to the specs Andrew Leigh from South Africa gave me in post #22 of this thread.
He said to leave velocities in fps, but change yardage range to meters, inches to cm, Fahrenheit to Celsius, altitude to meters, and wind speed from mph to kph. I've done all that. Check it out.
You can still download the program using the link shown in the first post, or from a link on the new web page I built for this program, which is at www.sanesoftware.com
Note that conversions will not be exact due to rounding in various parts of the calculations and due to inexact constants in the formulas. It shouldn't be more than about 1 percent however.
I've now changed my ballistics program to also handle some metric measurements, according to the specs Andrew Leigh from South Africa gave me in post #22 of this thread.
He said to leave velocities in fps, but change yardage range to meters, inches to cm, Fahrenheit to Celsius, altitude to meters, and wind speed from mph to kph. I've done all that. Check it out.
You can still download the program using the link shown in the first post, or from a link on the new web page I built for this program, which is at www.sanesoftware.com
Note that conversions will not be exact due to rounding in various parts of the calculations and due to inexact constants in the formulas. It shouldn't be more than about 1 percent however.
Andrew Leigh
Member
Awesome, thanks a million.
People may find it odd, the hybrid system I mean. We cope with it well, it is easier to use gr. than grams, fps than m/s etc. as converting these all the time is tiresome. ALL our data is imperial as it comes from the US.
The positive spin off is that we try shoot 1" groups at 100m (109yds) as 1" is the "standard" quoted for hunting rifles.
Andrew Leigh
Member
Hi ApplePie,
The version in that link still is full imperial? What am I doing wrong?
Cheers
The version in that link still is full imperial? What am I doing wrong?
Cheers
shootniron
Member
Thanks much...downloaded it and will put it to use.
fireman 9731
Member
Fantastic!
ApplePie
Member
Hi Andrew. That's weird. After reading your comment, I downloaded it again from that link and discovered the same thing as you; it was the older version! I checked the date of the file on my server and see it is the newer version!
So... what is going on? I'm going to GUESS that since you downloaded it before, that file was still sitting on your machine in a download folder or in some internal browser cache. When it saw that you wanted to download the same file again, it found it in it's cache and used the cached file instead.
Anyway, I then downloaded it again, and now I got the new version! Please try again. The setup program should say it is installing version 1.1 rather than 1.0, and you will see a new menu item called "Measurements".
You can also try downloading from the link on my website www.sanesoftware.com. Perhaps that will get around the cache issue, if it fact that is what's going on.
ApplePie
Member
Sure can. The default is yards, feet, inches and Fahrenheit, so you won't even notice the change if that's what you use.
Andrew Leigh
Member
Thanks ApplePie, working now.
ApplePie
Member
Thanks for letting me know Andrew. I appreciate it. I never thought about downloaded files being cached by the browser before. I should have suspected it, because when I tried it and got the cached version also, the download happened instantaneously. Normally it takes a few seconds.
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