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.
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).
However if you give the program first your 20m/30m sight marks and then your 70m/90m, you can find out how much speed your arrow loses at longer distances. If you fire two shots using the same pin at different distances and measure the arrow drop, you should be able to determine the speed without knowing distance to the eye, non? Dan 21/10/08 : Good calculator however it does not seem to account for decceleration and would only be the average arrow speed from distance one to distance 2, beyond distance 2 your arrow would be constantly deccelerating and thus your extrapolated sight pin settings are slightly off.
David Morrish 23/08/08 : As a new archer, I find the sighting info and arrow speed info very helpful, and have recommended the web site to others. A minor point (very minor) is that in the UK we regularly use distances measured in yards, but sight measurements in cm, so I have to convert the tables to give me data in this mixed format. Steve Brown,archery bowmanship and courtesy 11/11/08 : Hi I read the comments with interest do youhave a similar one for flight shooting.
I'm not a ballistic engineer, but very curious about how you find the formula. Just to test the calculator I entered a 10cm difference between to distances - then you can see how the decceleration, gravitational and other forces start to show a non-linear relationship. Mark 25/09/09 : Robin or Locksley : The things you mention are constants for the two shots from you bow setup and your arrows. Decceleration, gravitational forces and other forces are taken into account by the formular - see my earlier comment.
JTC 26/09/09 : As an Engineer by trade, I can see how this method of calculating speed would work. for those of us who use the English system some nice converstion calculators to convert to metric.
This is usually something around draw length sight extension but it's best if you measure it accurately. have to measure the distance from eye to scope to make sure it is accurate. Could you place a link to the formula you have used. Someday I will describe how it is done in a separate page.
It can also compute your other sight marks for FITA and other distances. have a good day pb Joe Tapley: Simple and pretty accurate - well done. PS: Joe, you drift program is excellent, it's amazing how good a model of arrow flight you made. Can it be tweaked to allow for sight marks where the distance between the eye and the sight pin changes (ie. ) Apostolos 20/05/07 : I think it could be tweaked for that but I have to find that piece of paper that I had all the equations written on..
bestel 17/07/07 : Hi Apostolos and congratulations, great job !