Hi Michael,
You can find photos of Rick's D-cell moulds and details of lots of other CD projects by other builders here (
www.ihpa.ie/carbon-dragon/index.php/cd-b...ck-mullins-cd#photos) and also in the group photos section here:
groups.yahoo.com/group/Carbondragonbuildersandpilots/photos.
Phil.
From:
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This email address is being protected from spambots. You need JavaScript enabled to view it.] On Behalf Of Michael McKeown
Sent: 25 December 2012 17:00
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Subject: [Carbondragonbuildersandpilots] D-tube mold construction
On Tue, Dec 25, 2012 at 2:52 AM, Rick Mullins <
This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:
I used 2 layers of the 5.7 oz. 284 twill fabric on mine. I believe Steve did the same, but he added a light layer of fiberglass on top I think as a sacrificial layer to sand away to make it smooth. I made molds for my leading edges. Steve build his over plugs which gives you a rough surface.
Rick,
How did you make your D-tube molds?
I've been doing some experiments with a variation on the concept developed with the construction of Mitja's Kanja by the college in the Netherlands. I just tried to find their web site to link here, but the project is several years old now and it seems they've taken the web site down. On Mitja's web site he refers to using female molds hot wire cut from styrofoam, lined with mylar, and the layup pressed with the male plug that was cut from the styrofoam. At least that's my interpretation of what he means. My experiments have been cutting the foam mold, lining with mylar, and vacuum bagging the layup in traditional fashion.
For those that might not know, now that the Kanja build web site appears to be gone, they hot wire cut the D-tube out of foam blocks, then glued sheet aluminum in the foam to create the mold surface. They used vacuum infusion to wet out the carbon skin. I believe their layup schedule was carbon/foam/glass, but I can't remember for sure. I'm working with that layup concept.
Michael
