|Nov 10, 2003, 07:24 AM|
Newbury Park, California
Joined Apr 2002
[B]Carbon Fiber/Spruce Spar Cap Construction Questions [/B]
I intend to glue CF and spruce strips to make composite spar caps. The spruce will have a 1/8 x 3/8 inch cross section and the unidirectional CF will be both .007 and .014 x 3/8 inches. Length will be 48 inches. (The purpose is to toughen-up the Mirage I?m gonna build )
How would y?all go about gluing and clamping this lamination?
I have had wonderful experience with rubberized CA and could use it. If epoxy would be better, I?d like to know which epoxy to use and would have to practice with it. Would the LHS epoxies do the job, like 30 min or finishing or ---- ? Could I use alaphatic resin? It is tough and flexible. Which of these three choices would last longest? What would you do?
Appying reasonable pressure uniformly to a 48? long strip of spruce with a slippery substance between it and the CF sounds like a tough chore. I have a flat bench and a piece of thick glass 48? long. I should be able to build a flat composite spar.
I can use waxed paper or plastic wrap keep the glue where it belongs. I can make & glue down straight edges onto the glass that are just tall enough to align the CF & spruce and prevent them from sliding laterally. The top of the spruce would then stand slightly proud of the straight edges. How would you clamp this assembly?
This is fun )
|Nov 10, 2003, 07:46 AM|
Re: [B]Carbon Fiber/Spruce Spar Cap Construction Questions [/B]
|Nov 10, 2003, 07:50 AM|
Re: Re: [B]Carbon Fiber/Spruce Spar Cap Construction Questions [/B]
[QUOTE]Originally posted by Hawksnest
[B]Joe, I just run a bead of thick CA down the middle of the spruce/bass spar
Forgot to say, when fully cured, hold the spars on edge and sand both carbon side edges so that the spars fit into the rib slots. Use a sanding block lightly, and don't breath the dust.
I dampen wet-or-dry paper to do this, the spars will dry fine. Bill
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