PLEASE NOTE: This is the Archived Sexyloops Board from years 2004-2013.
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Search found 12 matches
- Fri Jan 04, 2008 3:24 am
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
ERN=8,5 AA=72 NF=3,35hz Tipspeed 20cm amplitude=3,86m/sec. 40cm amplitude=6,89m/sec. 60cm amplitude=11,95m/sec. (Optical sensors placed at RSP with 20mm distance.) I'm using the approximation of the tip speed (harmonic oscillator): v_max = 2 * pi * d * f 0.2m -> v_max=4.2 0.4m -> v_max=8.4 0.6m -> ...
- Tue Dec 25, 2007 10:52 pm
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
Let me comment, but I will be the first to admit I really don’t understand the application of acceleration relative to fly rods. I hope you can educate me. Although I understand the concept of “accelerate to...”, I do not comprehend what you mean when you say “accelerate at ...”. And, yes, I do con...
- Tue Dec 25, 2007 2:08 pm
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
Without weight Rod 1: 2.75 Hz (165 CPM) Rod 2: 2.88 Hz (172.8 CPM) Exactly the same as before - difference - 4.8% (on computer reading) With Weight Rod 1: 1.40 Hz (84.00 CPM) Rod 2: 1.47 Hz (88.20 CPM) Difference 5% (on computer reading) The % differences loaded and unloaded were essentially the sa...
- Mon Dec 24, 2007 2:58 pm
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
- Sun Dec 23, 2007 6:37 am
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
I know a fellow who several years ago argued that IP should be expressed in grams instead of ERN. One of the nice things about metric units is that it is quite easy to translate the weight needed to bend a horizontal rod to the acceleration of a given mass of line needed to bend the same rod when i...
- Sun Dec 23, 2007 6:19 am
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
Hi DragginFly. Don`t forget that the rod is tapered. The stiffness and mass changes along the rod so that equation is not the best to use. But I suppose that`s not your point either. :) Quite right Tom. I did not want to get into the intricacies of non-linear systems nor for that matter of driven s...
- Fri Dec 21, 2007 10:43 pm
- Forum: Tackle
- Topic: Rod frequency vs. mass on tip
- Replies: 212
- Views: 32036
Any chance that you can find out (as John and Magnus allready says) if the difference in frequency relates to mass or stiffness - distribution? (Or both for that matter.) According to the text book and wikipedia : w = sqrt ( k / m ) where: w (that should be a lower case omega) is angular frequency ...
- Tue Dec 18, 2007 10:18 pm
- Forum: Tackle
- Topic: Quantifying Rod Feel - Neurobiology,Tests and Numbers
- Replies: 93
- Views: 11235
Frequency:If we have two rods with exactly the same stiffness-distribution,mass-distribution and lenght (oscillating lenght) would we all agree to that these two rods would feel the same? Tom. Isn't there one other factor - Damping. I think this might be what Paul calls Bounce. With zero damping th...
- Fri Dec 14, 2007 9:47 am
- Forum: Tackle
- Topic: Quantifying Rod Feel - Neurobiology,Tests and Numbers
- Replies: 93
- Views: 11235
Being a geek I find this kind of exercise almost as much fun as fishing. Feel is of course subjective but I think it is possible to quantify certain characteristics of a rod that can be matched to individual preferences. To get the ball rolling I hypothesize that for a given rod/reel/line combinati...
- Wed Oct 12, 2005 5:20 pm
- Forum: Tackle
- Topic: Balance, Momentum and Objectivity - Objective Balance
- Replies: 131
- Views: 13295
- Mon Sep 19, 2005 9:41 pm
- Forum: Tackle
- Topic: CCS, Oh no! - More CCS
- Replies: 430
- Views: 40588
Bill Even with no load applied the rod tip sags below the horizontal due its its own weight. This can be seen in Erics graph where with no loading he still has about 2.5 inches of deflection. So by doubling this deflection you are simulating adding the rods own weight as if it were all applied at t...
- Mon Sep 19, 2005 7:12 pm
- Forum: Tackle
- Topic: CCS, Oh no! - More CCS
- Replies: 430
- Views: 40588
Any thoughts about how to establish a measure for swingweight? We've argued about this before and I don't think there were any real conclusions. Maybe its as simple as fix the reel seat in a hinge and a spring balance to the tip. Just coming in here with my two CCs worth. One way to measure swing w...