Re: [ATM] Spider vane color?

["Don Clement" <clement.focuser@verizon.net>]

I wonder if the best thing would be to leave the polished finish on the SS
spider vanes. Reflected light from the spider vane sides would be diverted
harmlessly outside a truss or onto absorbing sides of a tube wall. An
example is a 3" to 2" adapter I make. The lower ½" of the 1" long adapter is
smooth sided 45 degree cone. Light is reflected from the smooth sides of the
adapter into the deep internal pleats of a flat black bellows. The result is
almost total absorption of the reflected light by the light trapping pleats
of the bellows. When looking up into the adapter the surface appears more
black than any thing I have experienced. The reflective cone and light
trapping pleats is blacker than even good black velvet surface.



Don Clement

Running Springs, California



> I'm rebuilding a 6", and I've made a spider from 0.005 inch
> stainless shim stock, 1/2 inch wide. It makes GREAT vanes
> -- very thin, very strong. BUT -- of course, they're
> polished stainless, but I hesitate to paint them black. I'd
> have to rough them up (not easy to do smoothly), and they'd
> end up thicker. And, at only 5 mils, paint will
> substantially thicken them. The spider is in a full tube,
> so they can't really reflect any light anywhere interesting
> - so I think leaving them bare is best.
> Suggestions/recommendations from the group??
> Doug
>
>
> _________________________________
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