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Flyfishing, flycasting and socks...
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Fly Rod Moment of Inertia CalculatorWarning: Use of undefined constant lrod - assumed 'lrod' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 45 Warning: Use of undefined constant m1 - assumed 'm1' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 47 Warning: Use of undefined constant l1 - assumed 'l1' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 48 Warning: Use of undefined constant cm1 - assumed 'cm1' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 49 Warning: Use of undefined constant m2 - assumed 'm2' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 51 Warning: Use of undefined constant l2 - assumed 'l2' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 52 Warning: Use of undefined constant cm2 - assumed 'cm2' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 53 Warning: Use of undefined constant m3 - assumed 'm3' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 55 Warning: Use of undefined constant l3 - assumed 'l3' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 56 Warning: Use of undefined constant cm3 - assumed 'cm3' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 57 Warning: Use of undefined constant m4 - assumed 'm4' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 59 Warning: Use of undefined constant l4 - assumed 'l4' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 60 Warning: Use of undefined constant cm4 - assumed 'cm4' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 61 Warning: Use of undefined constant m5 - assumed 'm5' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 63 Warning: Use of undefined constant l5 - assumed 'l5' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 64 Warning: Use of undefined constant cm5 - assumed 'cm5' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 65 Warning: Use of undefined constant m6 - assumed 'm6' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 67 Warning: Use of undefined constant l6 - assumed 'l6' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 68 Warning: Use of undefined constant cm6 - assumed 'cm6' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 69 Warning: Use of undefined constant m7 - assumed 'm7' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 71 Warning: Use of undefined constant l7 - assumed 'l7' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 72 Warning: Use of undefined constant cm7 - assumed 'cm7' (this will throw an Error in a future version of PHP) in /home/sexyloop/public_html/eric/moi.php on line 73
MOI Data Log (right-click to "save target as...", tab delimited text file, can be opened with excel)
Moment of inertia (MOI) is resistance of an object to rotational acceleration. The greater the MOI of a fly rod the more force (torque) is needed to cast that rod. This can be calculated using the rod's total length along with each section's mass, length, and mass center distance (measurement from the section's lower end to the balance point). This calculation is more accurate for multi-piece rods as the data from each section better estimates the mass distribution of the entire rod. This calculator is based on "Measuring Fly Rod Swingweight" by Grunde Løvoll and Magnus Angus, March 2008. Eric Mar08 |