Peter Dohm wrote:

"cavelamb himself" wrote in message
...

Drew Dalgleish wrote:

On Mon, 03 Sep 2007 13:08:32 -0500, cavelamb himself
wrote:



Acyrilic casting resin - arts and crafts stuff...


Would this stuff be suitable for making a lens cover for a wingtip
strobe?




Jerry Wass wrote:



Hmmm--I wonder how they get those little spiders,Scorpions, medalions
etc inside those polished acrylic deskweights???Jerry


Lou wrote:



Does anyone know of a material that starts as a liquid, but hardens as
a platic?
I want to make some custom plastic parts for my plane (no not for the
structure)
that will require making a mold and then pouring in the liquid.
Lou



Dunno, Drew.

I formed a few from Polycarbinate and Lexan with varying degrees of

sucess.

But the heat from the bulb turned out to be the real killer.
Actually melted through in less than 1/2 hour.
Granted wind would cool them some, but I gave up and replaced them
with normal wing tip marker lights (glass covers).

I can't guess how well acrylic resin would survive.
But the heat will for sure be an issue...

Guess that's why it says Experimental on the side.

Richard


I was about to suggest thermoforming from either Lexan or Plexiglas, since I
thought that was how the lenses on Bonanzas and the like were made. So, now
you made me curious--how much surrounding airspace was available iside the
ones you made?

Peter




Almost 1/2 inch above the 12 watt (1 amp) bulb.

Remember that there are thermoforming plastics and thermoSETTING plastics.

That might make all the difference in the world here...

Richard