"Greer, Joe" <jgreer@doubletake.com> wrote in message news:062D220DB6F757439046B5C97943D2D12FBAEF@mail-dev-in01.nsicorp.nsi.local...
FWIW If I use a hefty spanner to undo a rusty bolt, then the bolt heats up as I unscrew it. I guess the heat energy gained by the bolt is directly equivalent to the torque I had to apply to undo it. OTOH therefore one would think that applying heat to a rusty bolt should make it unscrew itself but unfortunately for some reason I have never been able to get that to work ! ;-)
regards Andy Little
As a former Ironworker, I can tell you that if you apply enough heat, the rust will often pop right off. If that doesn't work, then you apply even more and... what bolt was that you were talking about...
OK. I'll make sure Not to invite you round next time I need to get the sump plug off my motor ;-)
Just had to chime in from the peanut gallery.
Also, make sure that you are solving problems that are really likely to occur. It is nice to be as absolutely type safe as possible, but often that gets in the way of getting real work done as well. Just a thought.
I think the following quote (lifted from Quickbook) fits quite aptly here: "Why program by hand in five days what you can spend five years of your life automating?" -- Terrence Parr, author ANTLR/PCCTS The serious point was that there is a relation between torque and energy, but they are distinct. and actually the relation is slightly more complicated than I stated, but I think that for a bolt of N turns and assuming a constant torque, the heat dissipated (in Joules) == applied_torque (in N.m) * N / (2 * pi). regards Andy Little