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Wind shooting

 
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  #15  
Old 02-17-2004, 01:46 PM
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Re: Wind shooting

JBM

Thanks, I really appreciate that.

At first glance it appears that that my Thumb-Rule info is off by 4 to 6 inches (on the short side) at 1000 yards depending on the position (near or far) of my situational wind. I'd not considered creating a Scientific Wild Ass Guess (SWAG) factor to account for the increased Time Of Flight (TOF) at distance and how to increase my wind induced deflection numbers. I'll work on that!

I did find it interesting about the angular change continuing to increase after the projectile exited the wind effect area. Appears to be about a factor of 2 as does the 500 to 600 yard deflection as compared to my original Thumb-Rule stuff.

Is this "point mass" calculation/program available in a form that I could use? I'm a little short on higher education skills and am primarily a "poke and hope" type with geometry.
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  #16  
Old 02-17-2004, 04:41 PM
JBM JBM is offline
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Re: Wind shooting

<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>Is this "point mass" calculation/program available in a form that I could use? I'm a little short on higher education skills and am primarily a "poke and hope" type with geometry.<HR></BLOCKQUOTE>

Not really. I have a free Windows DLL for download [I get a lot of email saying "I'm not really good at math, but I program..."] and I wrote PM to test it. All I have is a Linux executable.
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  #17  
Old 02-17-2004, 09:50 PM
MAX MAX is offline
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Re: Wind shooting

Brad, you the JBM eskimo guy??? What part of Florida? Welcome aboard regardless!
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  #18  
Old 02-18-2004, 12:56 AM
JBM JBM is offline
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Re: Wind shooting

Here they are with the .470 BC, 2660 f/s @ STP:

test_470_10_000_1000.txt
test_470_10_000_100.txt
test_470_10_500_600.txt
test_470_10_900_1000.txt
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  #19  
Old 02-18-2004, 06:11 AM
JBM JBM is offline
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Re: Wind shooting

Yep. That's me. We just moved to Pace (a few minutes east of Pensacola).
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  #20  
Old 02-18-2004, 07:17 AM
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Re: Wind shooting

JBM

Thanks. I downloaded the MPM 0.9.28... I'll play with it in a bit.

Wind has always been of great interest to me and I'm working on a program to allow multivector winds and couldn't work out the wind induced acceleration and deceleration components. Perhaps this MPM will bring some things into focus for me.

/r
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  #21  
Old 02-18-2004, 10:34 AM
JBM JBM is offline
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Re: Wind shooting

Keep in mind that MPM does interpolation in a "wind field". You specify the wind at various points and it uses 2D interpolation to find the wind at all points. You cannot very easily turn the wind on and off like I showed in my other posts.
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