You might want to start at Sheldon's archive of Damon Rinard's bike
tech site.
http://sheldonbrown.com/
On Wednesday, Sep 28, 2005, at 13:20 US/Pacific, charles nighbor wrote:
> IN RIDE Issue Number 29 WINTER 2005 Page 139 there is a very
> interesting article on Frame Flex Testing with a Jig. Than on the
> following pages five frames are tested (Yes Modern new frames way past
> 1983 cut off but still tests results worth noting) and worth studying.
> When we discussed brazing materials silver versus brass and testing of
> them it brought this article to my mind. If you get a copy decide which
> one you prefer over the others. Than decide how it would affect ride.
> Then read how it did ride. See if you can go from test numbers to a
> correct interruption of results. I wonder just how much testing was
> ever
> done on steel lugged frames we all love and admire?
> Charles Nighbor
> Walnut Creek, CA