[MF3D.FORUM:388] Re: Sputnik fix up kit - Part II

[Brian Reynolds <reynolds@xxxxxxxxx>]

Paul wrote:
> Another issue that is not settled is what to do about
> the adhesive for installing the light leak fix materials.
> I've been warned that including an adhesive could cause
> problems sending the kit via U.S. mail due to prohibitions
> against mailing "hazardous materials."  Anyone have any
> insight on that?
> 

First thing to do is check the container the glue comes in.  If it is
a hazardous material (for shipping purposes) it should have a DOT
warning label on it.

Lots of mail order places sell all sorts of glue, so there should be a
way to solve this problem.  Of course it would be easier to just have
people buy their own glue.

> Finally, although I had not originally planned to do so, I
> would like to include sunshades in the kits.  I'm still
> clueless, however, as to what those materials are that Greg
> used to build his.  After I finish the baffle design, I'll
> tackle the sunshade issue.  If anyone else has any nifty
> sunshade design tips they would like to contribute, please
> feel free to pass them along!  ;-)
> 

Having managed to mangle a pair of PVC caps without maiming myself
(Never use an electric drill without really good clamping!) I've been
thinking of alternatives to the "drill a precisely sized and centered
hole in a cap/bottle/etc" problem.

In model rocketry you make stage transitions (truncated cones that
smooth the size differences between two different sized body tubes)
from a flat sheet of paper.  The calculations to figure out the size
and shape of the pattern to cut based on the dimensions of the
transition (the two diameters and the height) are easy.

If someone who has made an effective pair of lens shades could measure
the inside diameter of the lens shade at the open end and the height
from the front of the lens cell to the open end a pattern could be
made for conical lens shades.

    |<-- d -->| __
   ]|         |[ ^
   ]           [ |
   ]           [ h
   ]           [ |
   ]           [ v
   ]        ___[__
   ]  :     :  [
   ===:     :===

The lens shades themselves could be made from flocking paper, or
perhaps sheet plastic lined with flocking paper for durability.

-- 
Brian Reynolds                  | "Dee Dee!  Don't touch that button!"
reynolds@xxxxxxxxx              | "Oooh!"
http://www.panix.com/~reynolds  |    -- Dexter and Dee Dee
NAR# 54438                      |       "Dexter's Laboratory"