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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.
Arrows of composed of different materials, weights, lengths and the bow being used all play a factor.
Most (if not all) archery clubs have a radar device in which you place it near the target and shoot the arrow through it (from about 10 feet away / the arrow will have maximum velocity shortly after it's release). Ludek 13/08/09 : Hello, it is also good for bare bow, i tried it.
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.
If you're interested, contact me : bestel (at) ifrance (dot) com john r 26/07/07 : i used your speed chart and checked it against many of the known sight marks that i have and it was accurate for all of them.
It also includes compensation for aerodynamic drag. Dick Baugh 10/06/08 : Comparison with Accurate Sights software: Matched at 20 and 70 yards.Charles: it could be tweaked but it would require two more input variables. Roy 14/11/07 : an excellent tool but for one thing! would it be possible to produce a version with imperial input values for those of us who still live in the stone age...;-) Apostolos 21/05/08 : The calculator is back in order! It mesures it very i have some the calculation inculdes the air friction,arrow weight ext?Or its just enought to know the sight difrence between two distance?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).bestel 17/07/07 : Hi Apostolos and congratulations, great job !