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Glad to see you'r started. Might be nice to
know how even that piece stands up to heat - I realize you did not use a heat
resistant type of epoxy. But, now is a good time to find out how much
effect the heat has on less than optimum epoxy.
Ed
Ed Anderson
RV-6A N494BW Rotary
Powered
Matthews, NC
----- Original Message -----
Sent: Monday, July 05, 2004 6:36 AM
Subject: [FlyRotary] Carbon Fiber
Manifold Tube
I have finally got around to
working on my carbon fiber intake manifold design. I got some 2” carbon fiber
sleeve. Not having any bulk epoxy on hand I went to the hardware store and got
some EnviroTex Lite Pour-On (the only bulk epoxy they had). Pour-On is sold as
a heavy duty wood finish but it is clear epoxy 2 part epoxy. Unfortunately the
stuff takes a long time to dry. I used 2” foam pipe insulation as a form for
the carbon fiber. The test sample was 1 ply of CF. After it was fully dry (it
took 2 days) I tried to melt out foam pipe insulation with acetone. However,
acetone did not have any effect on the insulation and I was forced to cut it
out with a big knife. While not unexpected the CF tube was not as rigid as I
had hoped. My calculations say that it would have plenty of strength to
withstand a backfire but I think a more rigid manifold would be ideal. I will try making a sample with 2
layers today. A second layer will also greatly reduce the likelihood of pin
whole leeks (something I have not tested for yet). Attached are some pics of the CF
tube.
I will be sending out pics of my
design work later today.
Alex
Madsen
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