Sandwich board


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Norris
Norris
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I want to make a deck for an H format quadcopter. What I had in mind was to use two pieces of 2mm carbon fibre flat board, 450mm X 120mm wide. I would glue strips of wood, 16mm X 6mm around the edge and maybe two strips up the centre length ways, with the other board on top, giving me a sandwich aprox 20 mm thick. I was going to use epoxy resin as the adhesive. Or is there a material that would be better than wood? Any advice will be regarded with interest.
Warren (Staff)
Warren (Staff)
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The resin would work fine.

The board would be quite strong like that, however it would be stronger if the sandwich core was even throughout.  That way the outer panels cannot flex in the gaps and in effect reduce the sandwich effect and hence overall strength.

Perhaps a lighter wood or core material over the whole sandwich panel.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
Norris
Norris
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Thank you for taking the time to reply. I don't want to completely fill the void as I may want to surface mount some components and sink them through to top board into the space below, but if I change my mind I may do. How about injecting expanding foam into the void? The stuff I have will stick to absolutely anything, but I would need to drill a series of holes to allow for it to expand through to save the whole thing splitting apart.
fgayford
fgayford
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Hello
I would do what Warren described. Use foam and you can go even thinner for the strength will be incredible.
With a dremel and small bull nose bit,  you can cut and hollow out any chambers you need to sink your parts into.
Fred 
wozza
wozza
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Have to agree with both Warren and Fred. I would go.

2 x 200grm Carbon
10mm Closed Cell Foam
1 x 200grm Woven E-Glass or Carbon if cost is not an issue.
10mm Closed Cell Foam
2 x 200grm Carbon

This will give you an very strong, very stiff and very light board with a nominal 20mm thickness.
And as Fred says you can use a Dremmel to make pockets for your fittings.

Just remember to score and pierce the Closed Cell Foam ( if using Infusion ) in order to let resin through to the first layers of Carbon. Or buy the ready scoured/drilled stuffSmile

Regards Warren

Carbon Copies Ltd
Edited 12 Years Ago by wozza
GO

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