VTbowman Posted July 22, 2005 Report Share Posted July 22, 2005 A guy over on archerytalk asked about this and I swear I had read formula somewhere where you could do this by shooting from a known, specific distance and shooting an arrow, then moving back to another specific distance and shooting another then measuring then difference of POI to calculate FPS. Anyone know what I am talking about or knows this formula? Thanks. Quote Link to comment Share on other sites More sharing options...
dogdoc Posted July 22, 2005 Report Share Posted July 22, 2005 Re: Calulating FPS without a chrono???? no--but JB can estimate it using the TAP program and that darn program is pretty close. Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted July 23, 2005 Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? This method is usually within a few fps of actual speed for everyone I know that has tried it........ http://forums.mathewsinc.com/bulletinboards/snitz/topic.asp?TOPIC_ID=7408 Quote Link to comment Share on other sites More sharing options...
Smitteken Posted July 23, 2005 Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? I think I know what VTbowman is talking about but I don't remember how it went. I think i saw it in an old Peterson's Bohunting Magazine. They had you shoot from 20 yds then 40 yds then whatever your drop was you took that times something. There you had it a quick and dirty arrow speed. Quote Link to comment Share on other sites More sharing options...
VTbowman Posted July 23, 2005 Author Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? Yea by all means it did not give you anything near accurate FPS but it got ya real close and good enough. Obviously the chrono is your best bet but it did seem to work well when I tested it after I knew actual FPS. But this was a long time ago and I dont remember the formula or distances. I just remember doing it and it working fairly well.... Quote Link to comment Share on other sites More sharing options...
VTbowman Posted July 23, 2005 Author Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? PA- Thats not it. You dont work off know IBO specs or anything. Its all POI and distance related stuff. I have seen guys do that too and get pretty close. But it does not work well for traditional stuff that is not number spec crazy like compound stuff.. LOL Quote Link to comment Share on other sites More sharing options...
Smitteken Posted July 23, 2005 Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? Even If PA's thing worked I don't even have a starting point. I have no idea what the IBO is for my bow. Quote Link to comment Share on other sites More sharing options...
VTbowman Posted July 23, 2005 Author Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? Me either with custom hand made long bows. LOL Thats my point... Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted July 23, 2005 Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? I know that wasn't it, I was just offering you another method lol Quote Link to comment Share on other sites More sharing options...
Chrud Posted July 23, 2005 Report Share Posted July 23, 2005 Re: Calulating FPS without a chrono???? [ QUOTE ] This method is usually within a few fps of actual speed for everyone I know that has tried it........ http://forums.mathewsinc.com/bulletinboards/snitz/topic.asp?TOPIC_ID=7408 [/ QUOTE ] That is the one I was going to suggest. Quote Link to comment Share on other sites More sharing options...
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