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>> - Is one epoxy system (E-Z-Poxy vs Jeffco) better/worse for
the higher operating temps of the engine compartment?
- What's the collective wisdom on using carbon fiber vs std
E-glass for an engine plenum?
- For those that have built carbon fiber plenums, have you
seen any corrosion between the aluminum side plates and the
carbon layups? And if so, would some sort of gasket (made
out of the normal silicone baffling material) fix this?
Scott Richardson<<<
Scott,
I built a plenum for my 360 and would highly recommend it (composite,
not aluminum). Highly unscientific testing indicated a speed gain of
5kts+ (in line with other reports). I used a carbon/Kevlar/carbon
layup, with eglass on the inside flanges to prevent corrosion. I had
the materials on hand and find the Kevlar helps in high wear areas
around the screw holes. The workability of Kevlar is fine if it is not
the outside layer.
I used a high temp epoxy resin sold by PTM&W (address below- I don't
remember the part #). It is good for 400+F and is suitable for hand
layups (shorter potlife and slightly higher viscosity than the standard
Aeropoxy). Cost is also about 30-40% more. I postcured to 250F.
Enclosed are some pictures of the initial plenum (it has been refined
somewhat since then). It has been trouble free for 350 hours. Also
enclosed is an article on the plenum I wrote for the LNN several years
ago.
Regards,
Clark Baker
N250JF, LNC2 360
550hrs
PTM&W industries, Inc.
Santa Fe Springs, CA 90670
Call 800-421-1518
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