Hardy Marvel 7643
by Hardy
Several people have asked me to post the dimensions of the Hardy "Marvel" rod. Hardy listed this rod at 2 3/4 oz. and advertised it as the worlds lightest practical fishing rod. The rod has a very light full flexing action. I used a #4 line on mine. I first measured this rod in 1980 over varnish. A year later I bought the rod stripped it and remeasured over the cane. The forms I was using in those days were 6" centres before the Garrison book popularized 5" centres. Here are the dimensions.
Line Weight
4wt
Length
7'6"
Geometry
hex
Pieces
3pc
Action Length
6'8"
Line Type
DT
Stations
17
Cast Length
35'
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
164,334 psi
at 55″
Mean Stress
139,157 psi
Stress Range
164,334 psi
Uniformity
0%
Variable
Dimensions
| Station | Dimension | Stress |
|---|---|---|
| 0" | 0.069" | 0 |
| 1" | 0.071" | 32,691 |
| 2" | 0.073" | 59,989 |
| 3" | 0.076" | 82,795 |
| 4" | 0.078" | 101,847 |
| 5" | 0.080" | 117,753 |
| 6" | 0.083" | 125,796 |
| 7" | 0.087" | 131,223 |
| 8" | 0.090" | 134,668 |
| 9" | 0.094" | 136,610 |
| 10" | 0.097" | 137,413 |
| 11" | 0.101" | 134,343 |
| 12" | 0.105" | 130,911 |
| 13" | 0.110" | 127,281 |
| 14" | 0.114" | 123,570 |
| 15" | 0.118" | 119,857 |
| 16" | 0.120" | 122,851 |
| 17" | 0.122" | 125,532 |
| 18" | 0.124" | 127,933 |
| 19" | 0.126" | 130,082 |
| 20" | 0.128" | 132,007 |
| 21" | 0.129" | 135,721 |
| 22" | 0.131" | 139,265 |
| 23" | 0.132" | 142,649 |
| 24" | 0.134" | 145,883 |
| 25" | 0.135" | 148,977 |
| 26" | 0.138" | 145,554 |
| 27" | 0.142" | 142,249 |
| 28" | 0.145" | 139,065 |
| 29" | 0.149" | 136,002 |
| 30" | 0.152" | 133,061 |
| 31" | 0.153" | 137,514 |
| 32" | 0.154" | 141,843 |
| 33" | 0.156" | 146,052 |
| 34" | 0.157" | 150,148 |
| 35" | 0.158" | 154,134 |
| 36" | 0.161" | 153,422 |
| 37" | 0.164" | 152,636 |
| 38" | 0.166" | 151,788 |
| 39" | 0.169" | 150,891 |
| 40" | 0.172" | 149,957 |
| 41" | 0.174" | 150,601 |
| 42" | 0.176" | 151,170 |
| 43" | 0.179" | 151,672 |
| 44" | 0.181" | 152,113 |
| 45" | 0.183" | 152,499 |
| 46" | 0.185" | 154,386 |
| 47" | 0.186" | 156,215 |
| 48" | 0.188" | 157,990 |
| 49" | 0.189" | 159,712 |
| 50" | 0.191" | 161,385 |
| 51" | 0.193" | 162,051 |
| 52" | 0.195" | 162,675 |
| 53" | 0.197" | 163,262 |
| 54" | 0.199" | 163,814 |
| 55" | 0.201" | 164,334 |
| 56" | 0.204" | 162,458 |
| 57" | 0.207" | 160,631 |
| 58" | 0.210" | 158,855 |
| 59" | 0.213" | 157,129 |
| 60" | 0.216" | 155,452 |
| 61" | 0.219" | 155,753 |
| 62" | 0.221" | 155,992 |
| 63" | 0.224" | 156,177 |
| 64" | 0.226" | 156,312 |
| 65" | 0.229" | 156,403 |
| 66" | 0.232" | 155,398 |
| 67" | 0.235" | 154,384 |
| 68" | 0.239" | 153,365 |
| 69" | 0.242" | 152,345 |
| 70" | 0.245" | 151,328 |
| 71" | 0.250" | 147,130 |
| 72" | 0.255" | 143,148 |
| 73" | 0.260" | 139,369 |
| 74" | 0.265" | 135,782 |
| 75" | 0.270" | 132,374 |
| 76" | 0.274" | 130,575 |
| 77" | 0.278" | 128,837 |
| 78" | 0.282" | 127,156 |
| 79" | 0.286" | 125,531 |
| 80" | 0.290" | 123,962 |