Steve -- Actually, this is a darned important concept, and very complex. In his ongoing "scattered series" of articles for TBM, where he breaks it all down and tells it where we can all understand (with as little math, etc. as possible), Ashby has a detailed FoC article, though it will likely be a few more months before it runs. Meanwhile, you can check the Ashby forum here, I believe the 2007 test results, for details. EFoC, definited as 20% or more forward-of-center balance, not only makes arrows fly better with less fletching (due to a long rear lever-arm and a short front lever-arm), but also greatly increases penetration by reducing arrow flex and vibration. Nothing I'm capable of explaining, but something I can understand when plainly put, and something I can darn sure see when my arrows group better and slug plumb through the backstop and 3" into a tree (target points at that). I have tried the GrizzlyStiks, with a 300-grain field point, and am amazed at the accuracy and punch they deliver from a 55# longbow. Bitter medicine for an old-school woodie shooter like me. Consequently, I am experimenting with ways to get more weight up front on woodies, as are many others here. It's great off-season fun, and good exercise for long-closed minds like my own. Dave
Topic: New Guy Alert//Meaning of EFOC/FOC (Read 641 times)
