RE: [RCSE] Importance of foam core cutting sequence (long)

[Scobie Puchtler or Sarah Felstiner]

> This translates into wider kerf at the "slow" end.
>
> With that said, I'm not real sure but that "gravity-powered"
> cutters have the
> same problem.

They do have the same problem. It is especially well illustrated when
cutting wings for a delta in which the root may be twice the tip chord or
more. Doesn't matter what's doing the driving. In this extreme taper
situation, it is obvious that most of the pull work is being done at the
root templates, where the wire is doing maximum  speed within the system. At
the tip, the pull cord is still doing its job, but it barely has to work
against any resistance, because the wire has such a long time to eat foam
that there is virtually no resistance. In fact strange waviness in the foam
at the tip can always be expected to some extent because the hot wire spends
so much more time in so much less foam that the surface is affected by the
constant radiant heat. Its all kind of fascinating once you get to thinking
about it.

Lift,
Scobie in Seattle

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