TAM Report post Posted July 27, 2010 So if I'm shooting a 403 grain arrow at 325 fps how can I calculate how much kenetic energy my arrow has at say 100 yards? Seems like there are a lot of calculators that will tell me my arrows KE at the starting line, but what about down range? Share this post Link to post Share on other sites
jamaro Report post Posted July 27, 2010 Tim... I ran it thru AA and emailed it to you.... Any Guesses??? All I have to say is I hate you long armed people... Jason Share this post Link to post Share on other sites
TAM Report post Posted July 27, 2010 I seriously was thinking of emailing you the question directly! 31 Inches... HA! Since it's nearly 95 ft lbs to start I'll guess 70 give or take? What about 120 yards? Share this post Link to post Share on other sites
jamaro Report post Posted July 27, 2010 Range Terminal Arrow Drop Arrow Drop Kinetic Speed Total Per Yard Energy 0 325.00 fps 0.0" 0.0" 94.4 ft/lb 5 322.64 fps 0.4" 0.2" 93.1 ft/lb 10 320.30 fps 1.6" 0.3" 91.7 ft/lb 15 317.96 fps 3.5" 0.5" 90.4 ft/lb 20 315.65 fps 6.3" 0.7" 89.1 ft/lb 25 313.35 fps 9.9" 0.8" 87.8 ft/lb 30 311.06 fps 14.3" 1.0" 86.5 ft/lb 35 308.79 fps 19.6" 1.2" 85.2 ft/lb 40 306.53 fps 25.7" 1.3" 84.0 ft/lb 45 304.28 fps 32.7" 1.5" 82.8 ft/lb 50 302.05 fps 40.6" 1.7" 81.6 ft/lb 55 299.83 fps 49.4" 1.9" 80.4 ft/lb 60 297.63 fps 59.2" 2.1" 79.2 ft/lb 65 295.44 fps 69.8" 2.2" 78.0 ft/lb 70 293.26 fps 81.4" 2.4" 76.9 ft/lb 75 291.10 fps 94.0" 2.6" 75.8 ft/lb 80 288.95 fps 107.5" 2.8" 74.6 ft/lb 85 286.82 fps 122.1" 3.0" 73.5 ft/lb 90 284.69 fps 137.6" 3.2" 72.5 ft/lb 95 282.59 fps 154.1" 3.4" 71.4 ft/lb 100 280.49 fps 171.7" 3.6" 70.3 ft/lb 105 278.41 fps 190.4" 3.9" 69.3 ft/lb 110 276.34 fps 210.1" 4.1" 68.3 ft/lb 115 274.28 fps 230.8" 4.3" 67.3 ft/lb 120 272.24 fps 252.7" 4.5" 66.3 ft/lb 125 270.21 fps 275.6" 4.7" 65.3 ft/lb 130 268.20 fps 299.7" 5.0" 64.3 ft/lb 135 266.19 fps 325.0" 5.2" 63.3 ft/lb 140 264.20 fps 351.3" 5.4" 62.4 ft/lb 145 262.22 fps 378.9" 5.6" 61.5 ft/lb 150 260.26 fps 407.6" 5.9" 60.6 ft/lb Share this post Link to post Share on other sites
TAM Report post Posted July 27, 2010 Thank you, that is exactly what I wanted!!! Share this post Link to post Share on other sites
Codywhi Report post Posted July 28, 2010 you gotta love AA!!!!! Share this post Link to post Share on other sites
Curtis Reed Report post Posted July 28, 2010 A 400+ grain arrow at 320+ fps.... KE will never be a concern of yours. Share this post Link to post Share on other sites
couesbowhunter1 Report post Posted October 21, 2010 wow thats fast Share this post Link to post Share on other sites
seek100plus Report post Posted October 22, 2010 That is great information, what I am curious about is I have the same draw length and shoot the same grain arrow, is there away of finding out what kinetic energy is needed to complete a pass through on deer or elk at different yardage .I know that ribs and body size are very different between elk and deer ,plus broad head will come into play. I wish there was away to know for sure at what yardages you will have a enough kinetic energy to get a complete pass through and a humane kill. Share this post Link to post Share on other sites
slopoke36 Report post Posted October 22, 2010 1/2 the speed times the mass squared is the formula. You just need to know how fast the arrow is going at 100yrds. Share this post Link to post Share on other sites
azslim Report post Posted October 23, 2010 KE=mass x velocity x velocity divided by 450240 Share this post Link to post Share on other sites
couesbowhunter1 Report post Posted October 27, 2010 cool Share this post Link to post Share on other sites
