-Joseph Berki wrote:

Perry and all,

         Once you determine what route the scat tubing  takes, you could
hot wire straight tubing sections out of the blue foam scraps that you used
in the wings.  Cut the sections at various angles and glue together to get
curved bends.  Sand to get smooth contours.  You can start with a larger
diameter.  Coat the entire core with silicon and then glass.  Use gasoline
or other solvent to remove the foam.  Grab the silicon with pliers and pull
it off of the tube and the inside will be smooth not rough.  I am
interested in your results with the new intake system, Perry.  I appreciate
the discussion on the exhaust system items as this is a problem in a pusher.

Joe Berki
Limo EZ
ailerons

Really really great idea Joe. You could also use a hole saw and cut a
bunch of round slugs the proper size. You could make your own deeper
hole saw out of steel tubing. Or just use an arbor or drill press to
cut the foam slugs with the sharpened steel tubing.

Sand the angles on them and glue them together with contact cement
or hot glue.

This sounds like a real break through in fabing composite intake manifold
runners. About two years ago we had a bunch of ideas discussed on
fabing composite intake runners and this is head and shoulders above
anything else we could come up with.

Thanks Joe for sharing that idea.

BTW does anybody know how to dilute silicone RTV so you can paint
it on? How about a source for low viscosity silicone RTV?

I also think wrapping the cores with vinyl electrical tape
will also work but not as smooth as silicone.

Paul Lamar

Paul, what about moulding latex?
It is used to paint on a pattern and then pour plaster over the rubber (latex),
remove the plaster mold peel the latex place it on the plaster mold ready to pour
a copy of the original mold.
Royce

Sounds good if it is thin enough to paint and will form a smooth
surface on the blue foam.

Paul Lamar

It is applied with a brush, just like paint. It dries fairly quickly and you can build
up the thickness to what ever is desired.
Peels off a pattern like a glove.
Royce

 
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