Sorry, Jerry -- gotta part with you on this one, man. I have stainless 1/8,
3/16, and 1/4 inch rods, all four feet. I cut them down from six feet since
they would sway on the pad under their own weight, forgetting about the
mass and wind load of the rocket. The 1/4" rod is okay at four feet, but no
more. And when I want to launch some medium power thing that is more than a
pound or two I go to a stiff aluminum rod.
Is it possible that there are different hardness (read, stiffness) levels
for stainless? There must be, otherwise why would my stainless S&W handguns
hold up to .357 and .44 Magnum charges? Can we get rods fabricated from the
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