-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

I worked for a short time in a wholsale supply place and one of

the products

we sold was a flexible type of foam rod. Unfortunately I can not

recall what

is was called or what it was used for. I believe it was used for

inserting

into cracks as a filler. It was availble in 3 or 4 foot lengths

and many

diameters probably in the 1/2" to 3" range. It might be handy for

making

moulds. Welding rods or dowels could be inserted into them to

stiffen as

necessary. If you are familiar with kids and swimming pools these

things are

similar to water noodles. I'll try and call the outfit tomorrow

and get a

name and maufacturer.

John

John   The product you are thinking abt is "backing rod" available in
1/4"  diameter up to 2 " here.
Very flexible, very cheep and is used for filling voids before pouring
concrete..should be ideal
for making an intake mould. New kid on the block here....in south
Mississippi, any rotary power
aircraft within 200 miles ??  Chas

 
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