The new manifold held up under the 8 1/2 hours of flying there and
back, so it appears the plastic will hold up (short term at least -

only

time will tell long term).  One of the guys there, Monty, happens to

have a

lot of experience with resin - they apparently use it quite a bit for
prototyping and pretty much confirmed that as long as its not cooked

by

radiant heat off the exhaust it should have a long life.  Still

researching

the many types of resin to see if there is a better one.

Ed,

Looks like the big boys are getting into the act as well.  Superior just
released info on their new intake system that is being manufactured
using
Ryton resin.  Here is a quote from the news release:

"Ryton is a Polyphenylene Sulfide Resin (PPS) product from Chevron
Phillips
Chemical Company LP. This material is an ideal choice for aircraft
piston
air-cooled engines exposed to high temperatures, fluids or mechanical
stress. Ryton PPS is a lighter weight alternative to metals that are
resistant to corrosion and all fluids associated with piston engines.
The
ability to mold complex parts to tight tolerances and insert molding
capability accommodates multiple component integration."

Apparently they were able to cut the weight of the intake by 50% by
using
Ryton instead of aluminum.  To read the rest of the press release go to
www.superiorairparts.com and Look for the press release dated July 14th.

Paul, is it advisable to attach PDF files on this list?  If so, what is
the
max size you want to see?

Jake Crause

If you are sending pdf's it is ok but if they are over 150K or so I can't
promise I will publish them. What I usually do is capture a couple
of illustrations and summaries the text.

Paul Lamar
 
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