Ok, I had to weigh each component seaperately because my scale only goes up to 1650 grains. [8D]
Total arrow weight = 2084 grains.
Speed = 141 fps.
KE =92.02 foot pounds.
Here are the original numbers from the 82ndI shot a few days ago.
443 grain arrow...302 fps... 90 foot pounds
502 grain arrow...283 fps... 89 foot pounds
625 grain arrow... 256 fps... 91 foot pounds
The KE level isn't climbing like all of the graphs and charts that Sylvan posted say it should. While the Ke level is a tad higher, I suspect that if I were able to keep going up in arrowweight the KE numbers would begin steadily falling. Any one have a 3000, 4000grain arrow laying around?
No two bows are going to be the same when it comes to this kind of thing.
I suspect that the 82nd has a"hump" in the efficiency of thebow.I am sure it has everything to do with the cam design. But it still proves the point of "not always". There are far too many variables in how a bow performs from one to the next.
The momentum this arrow has is unbelievable. 1.31 lb/sec. It rocks a large 24 pound Magic Stop target like I have never seen and the bow, when fired, actually recoils into your hand like a gun would. And talk about a quiet bow.
My General posted these numbers.
398 grains... 290.2 fps... 74 foot pounds
443 grians... 276.7 fps... 75 foot pounds
465 grains... 270.1 fps... 75 foot pounds
502 grains... 259.8 fps... 75 foot pounds
625 grains... 234.4 fps... 76 foot pounds
2084 grians... 129.4 fps... 77 foot pounds