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Free Recoil calculation spreadsheet

 
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  #1  
Old 11-13-2006, 06:45 PM
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Join Date: May 2001
Posts: 3,665
Free Recoil calculation spreadsheet

I created this Excel file several years ago.

Input the weight of the rifle, bullet and powder charge, add the bullet velocity, stir well and it spits out the ft-lbs of recoil.

Click on the link below to download the Excel file.
Attached Files
File Type: xls RECOIL.XLS (35.0 KB, 408 views)
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Last edited by Len Backus; 02-01-2008 at 07:23 AM..
  #2  
Old 12-24-2008, 11:56 AM
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Join Date: Nov 2005
Posts: 33
Re: Free Recoil calculation spreadsheet

Very cool.
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  #3  
Old 02-22-2009, 12:19 AM
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Join Date: Oct 2007
Location: Patagonia Mountains, Arizona
Posts: 108
Re: Free Recoil calculation spreadsheet

There's not sufficient input information to determine the average velocity vector of the molecules of the propellant gas. Certainly barrel length, expansion ratio, propellant pressure (or temperature) and the effect of a brake (if any) imake a difference in recoil even though all the parameters used in this spreadsheet are held constant.

Some programs (like Quickload) give one recoil emergy calculation as the bullet passes the crown and another value after the propellant has exited the barrel. The first number is the same wiith or without a brake. The second can be more or less with a brake and can be considerably different. Quickload however doesn't calculate the effect of a brake. Brake manufactures dont give performace data which can be used in calculations, at least none that I've seen.

This spreadsheet appears to be the result of empirically fitting of measured data from tests on typical rifles without brakes. For that I expect it works fairly well.
.
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  #4  
Old 03-08-2009, 01:40 AM
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Join Date: Feb 2009
Posts: 8
Re: Free Recoil calculation spreadsheet

Thanks
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