Super-glue and soda

Brian Johnsen (joh...@eskimo.com) wrote:
: In article <797...@minster.york.ac.uk>,
: Tom Jackson <to...@minster.york.ac.uk> wrote:
: >I picked up an interesting tip from the rec.guitar
: >news group the other day.
:   [  ]
: >I find plugging Beman makes it more resilient to splintering
: >down its length.  Anybody else find this or am I a victim of
: >folk-lore again (like line sleeving.  Oops better not start that
: >one off again)?
: 
:   When you smash a spar into a hard object at a near perpendicular angle,
: one part of the cylinder will make a desperate attempt to transfer energy
: to the rest of the structure.  A shock cone forms at the point of impact
: and tries to radiate energy to the balance of the material in question in
: as direct a path as possible (straight lines are best).
: 
:   A hollow cylinder must transfer the energy along curved paths, so that
: the energy must travel in a longer path to reach equalibrium.  If the 
: walls cannot transfer that energy fast enough, they will begin to crush
: until enough of the wall surface is in contact with the impacted object
: to transfer the load.  Here's the nasty part; the crushed portion is a
: morass of microcracks, some of which have the potential to propagate 
: straight up the length of the spar.
: 
:   Pultruded spars are more prone to splitting up the middle than spars
: with fibers wrapped around the diameter.  There's nothing to keep the
: crack from traveling.
: 
>   Uh.  Yeah.  Filling the ends gives a more direct route for the shock
> wave to pass through to the rest of the spar.
:
> (Do I get an enameled Ludwig Plutonium pin for that one?)


You most certainly do get a Ludwig Plutonium kitepin:


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Bye,