Back to LibraryClassic Taper
Smithwick Spiral Rod
by Smithwick
Tom Smithwick's taper for his spiral constructed rod sent to rodmakers list in Jun 1999.
Line Weight
6wt
Length
7'6"
Geometry
hex
Pieces
2pc
Action Length
6'8"
Line Type
DT
Stations
17
Cast Length
40'
Tip-heavy
This rod has a "Tip-heavy" 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
157,814 psi
at 7″
Mean Stress
135,506 psi
Stress Range
157,814 psi
Uniformity
0%
Variable
Peak Stress
Low Point
Uniform Zone
Transition
Ferrule
Click dots to exploreDimensions
| Station | Dimension | Stress |
|---|---|---|
| 0" | 0.072" | 0 |
| 1" | 0.074" | 42,565 |
| 2" | 0.076" | 78,300 |
| 3" | 0.079" | 108,306 |
| 4" | 0.081" | 133,492 |
| 5" | 0.083" | 154,613 |
| 6" | 0.088" | 157,743 |
| 7" | 0.093" | 157,814 |
| 8" | 0.097" | 155,896 |
| 9" | 0.102" | 152,705 |
| 10" | 0.107" | 148,729 |
| 11" | 0.110" | 150,028 |
| 12" | 0.114" | 150,510 |
| 13" | 0.117" | 150,351 |
| 14" | 0.121" | 149,690 |
| 15" | 0.124" | 148,640 |
| 16" | 0.127" | 148,108 |
| 17" | 0.130" | 147,284 |
| 18" | 0.134" | 146,229 |
| 19" | 0.137" | 144,994 |
| 20" | 0.140" | 143,620 |
| 21" | 0.143" | 143,431 |
| 22" | 0.146" | 143,089 |
| 23" | 0.148" | 142,619 |
| 24" | 0.151" | 142,044 |
| 25" | 0.154" | 141,383 |
| 26" | 0.157" | 141,264 |
| 27" | 0.159" | 141,060 |
| 28" | 0.162" | 140,783 |
| 29" | 0.164" | 140,444 |
| 30" | 0.167" | 140,054 |
| 31" | 0.170" | 139,682 |
| 32" | 0.172" | 139,270 |
| 33" | 0.175" | 138,825 |
| 34" | 0.177" | 138,352 |
| 35" | 0.180" | 137,859 |
| 36" | 0.182" | 137,853 |
| 37" | 0.185" | 137,816 |
| 38" | 0.187" | 137,754 |
| 39" | 0.190" | 137,669 |
| 40" | 0.192" | 137,565 |
| 41" | 0.194" | 137,491 |
| 42" | 0.197" | 137,401 |
| 43" | 0.199" | 137,297 |
| 44" | 0.202" | 137,183 |
| 45" | 0.204" | 137,060 |
| 46" | 0.207" | 137,012 |
| 47" | 0.210" | 136,895 |
| 48" | 0.213" | 136,719 |
| 49" | 0.216" | 136,490 |
| 50" | 0.219" | 136,217 |
| 51" | 0.222" | 136,307 |
| 52" | 0.225" | 136,351 |
| 53" | 0.227" | 136,355 |
| 54" | 0.230" | 136,324 |
| 55" | 0.233" | 136,261 |
| 56" | 0.236" | 136,200 |
| 57" | 0.239" | 136,113 |
| 58" | 0.241" | 136,003 |
| 59" | 0.244" | 135,875 |
| 60" | 0.247" | 135,729 |
| 61" | 0.250" | 135,921 |
| 62" | 0.252" | 136,092 |
| 63" | 0.255" | 136,245 |
| 64" | 0.257" | 136,382 |
| 65" | 0.260" | 136,504 |
| 66" | 0.263" | 136,096 |
| 67" | 0.266" | 135,685 |
| 68" | 0.269" | 135,272 |
| 69" | 0.272" | 134,859 |
| 70" | 0.275" | 134,447 |
| 71" | 0.278" | 134,646 |
| 72" | 0.280" | 134,834 |
| 73" | 0.283" | 135,013 |
| 74" | 0.285" | 135,182 |
| 75" | 0.288" | 135,345 |
| 76" | 0.292" | 133,031 |
| 77" | 0.297" | 130,809 |
| 78" | 0.301" | 128,674 |
| 79" | 0.306" | 126,623 |
| 80" | 0.310" | 124,652 |
Stress profile: