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Obuchowskis Big Rod
by Obuchowskis
Submitted to the Rodmakers Listserve by Chris Obuchowski
Line Weight
8wt
Length
8'
Geometry
hex
Pieces
2pc
Action Length
7'2"
Line Type
DT
Stations
18
Cast Length
45'
Parabolic (butt-flex)
This rod has a "Parabolic (butt-flex)" stress profile. Stress varies significantly across the rod. Some sections work much harder than others, creating a pronounced action character. Peak stress is well below the failure threshold, giving this rod a generous safety margin.
Peak Stress
174,717 psi
at 86″
Mean Stress
123,473 psi
Stress Range
174,717 psi
Uniformity
0%
Variable
Peak Stress
Low Point
Uniform Zone
Transition
Ferrule
Click dots to exploreDimensions
| Station | Dimension | Stress |
|---|---|---|
| 0" | 0.090" | 0 |
| 1" | 0.094" | 30,100 |
| 2" | 0.098" | 53,041 |
| 3" | 0.103" | 70,499 |
| 4" | 0.107" | 83,727 |
| 5" | 0.111" | 93,675 |
| 6" | 0.116" | 99,635 |
| 7" | 0.121" | 103,545 |
| 8" | 0.125" | 105,914 |
| 9" | 0.130" | 107,121 |
| 10" | 0.135" | 107,456 |
| 11" | 0.138" | 111,471 |
| 12" | 0.141" | 114,844 |
| 13" | 0.144" | 117,664 |
| 14" | 0.147" | 120,004 |
| 15" | 0.150" | 121,928 |
| 16" | 0.152" | 127,016 |
| 17" | 0.153" | 131,845 |
| 18" | 0.155" | 136,431 |
| 19" | 0.156" | 140,788 |
| 20" | 0.158" | 144,931 |
| 21" | 0.162" | 141,367 |
| 22" | 0.167" | 137,882 |
| 23" | 0.171" | 134,490 |
| 24" | 0.176" | 131,201 |
| 25" | 0.180" | 128,022 |
| 26" | 0.184" | 126,643 |
| 27" | 0.187" | 125,247 |
| 28" | 0.191" | 123,843 |
| 29" | 0.194" | 122,442 |
| 30" | 0.198" | 121,048 |
| 31" | 0.200" | 122,970 |
| 32" | 0.202" | 124,831 |
| 33" | 0.203" | 126,635 |
| 34" | 0.205" | 128,385 |
| 35" | 0.207" | 130,084 |
| 36" | 0.210" | 128,786 |
| 37" | 0.214" | 127,508 |
| 38" | 0.217" | 126,251 |
| 39" | 0.221" | 125,018 |
| 40" | 0.224" | 123,812 |
| 41" | 0.228" | 122,338 |
| 42" | 0.231" | 120,906 |
| 43" | 0.235" | 119,517 |
| 44" | 0.238" | 118,171 |
| 45" | 0.242" | 116,866 |
| 46" | 0.245" | 117,052 |
| 47" | 0.247" | 117,227 |
| 48" | 0.250" | 117,395 |
| 49" | 0.252" | 117,557 |
| 50" | 0.255" | 117,712 |
| 51" | 0.258" | 117,884 |
| 52" | 0.260" | 118,051 |
| 53" | 0.263" | 118,214 |
| 54" | 0.265" | 118,374 |
| 55" | 0.268" | 118,531 |
| 56" | 0.271" | 117,658 |
| 57" | 0.275" | 116,813 |
| 58" | 0.278" | 115,994 |
| 59" | 0.282" | 115,201 |
| 60" | 0.285" | 114,434 |
| 61" | 0.285" | 117,580 |
| 62" | 0.285" | 120,782 |
| 63" | 0.286" | 124,039 |
| 64" | 0.286" | 127,351 |
| 65" | 0.286" | 130,718 |
| 66" | 0.288" | 131,995 |
| 67" | 0.290" | 133,262 |
| 68" | 0.291" | 134,519 |
| 69" | 0.293" | 135,767 |
| 70" | 0.295" | 137,006 |
| 71" | 0.297" | 137,701 |
| 72" | 0.299" | 138,387 |
| 73" | 0.302" | 139,064 |
| 74" | 0.304" | 139,732 |
| 75" | 0.306" | 140,393 |
| 76" | 0.307" | 142,443 |
| 77" | 0.308" | 144,496 |
| 78" | 0.310" | 146,552 |
| 79" | 0.311" | 148,610 |
| 80" | 0.312" | 150,671 |
| 81" | 0.312" | 154,519 |
| 82" | 0.312" | 158,429 |
| 83" | 0.312" | 162,403 |
| 84" | 0.312" | 166,439 |
| 85" | 0.312" | 170,539 |
| 86" | 0.312" | 174,717 |
Stress profile: