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I am very happy to live with this minor issue, but if you ever found yourself with nothing to do sometime ........!!! Best wishes, David Morrish Harry Marx 03/09/08 : I did the same thing, but derived formula myself. Normally the arrow is shot at 42 to 47 degrees with specialist bows?I have studied balistics but have no luck with the maths. helped me with science fair Apostolis 13/01/09 : Thank you all for your comments. I am shooting field ranges where uphill/downhill calculations depend on arrow speed. Sam S44 22/03/09 : Can you give us Yards and inches?This program can calculate your arrow speed, given two previously known sight marks.The only thing you need to know is the distance from your eye to the sight pin. I am trying to make a ballistic module for bowhunters, like yours but take also Ballistic Coefficient, but I cannot find out how to calculate speed at differents distance. I used Mathematica to find the solution and it's a formula 4 lines long.If I find some time, I will update the calculator with your suggestions. Joan Smith 05/06/09 : I was asked how fast an arrow travels so I Googled to find out.I found this and thought the very thing I'l just print this out for future questions! Robin Of Locksley 19/06/09 : This calculator is quite vague (even for English standards).All the results are fairly accurate, congrats on a job well done.paul f 08/09/10 : i have access to a speed gun would that work too kayla 10/09/10 : that is cool Li 01/10/10 : This calculator works pretty well.
I am only trying to find an easy way to find out how fast the arrow went...
Yours is 4.2 inches low at 10 yards, 8.3 inches high at 50 yards and 44.7 inches low at 80 yards relative to Accurate Sights which includes air drag and distance from eye to arrow. The aerodynamic drag is not taken into account as it impossible to do with only 4 inputs.
This program was meant mostly as an easy way to estimate your arrow speed.
and do you thing to make this calculator for windows or windows mobile? Dick Baugh 08/06/08 : I use Accurate Sights software from someone in Australia.
It also includes compensation for aerodynamic drag. Dick Baugh 10/06/08 : Comparison with Accurate Sights software: Matched at 20 and 70 yards.