Re: ATM 3-Vane or 4-Vane Spiders

[David Smith <areopagus125@yahoo.com>]

--- Jim Miller <jim@jtmiller.com> wrote:
> 3. Number of spikes is 2x number of vanes.  In the
> case of a 4 vane
> non-offset spider you get 8 spikes which overlay to
> 4 spikes of double
> intensity and same length.  Offseting blurs the same
> energy across a larger
> pattern of four proportionately reduced intensity
> spikes.

Why?  (referring to the last sentence.)  The spike is
perpendicular to the vane, and if the offset vanes are
parallel to each other, you will still get coinciding
spikes.  

    David Smith


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