[MHml] Daggerboard Cases
multihulls at steamradio.com
Tue Jan 22 02:50:39 EST 2002
On an F9A (aka home built F31) you want a flat bottom for trailering and
beaching. So think inverted and build that sold glass structure inside
the boat with the cored case above that.
If it were me I'd contact Ian and stick with his recommendation's. If
he recommends core then stick with his plans exactly or ask first. The
smallest change here could be a real problem.
As far as wood goes, well keep it above the water line. If you don't
like sold glass because of the weight the think outside the box as it
were. Carbon yarn is cheap and builds up pretty fast. But put the
glass around it because you will want to run the carbon fore/aft but
need the structure running up and down. I'm only using the carbon in
this example to get some thickness and to spread point loads.
I do a structural tape buy winding carbon yarn around 2 pipes so that it
builds a long belt. Now cover the outside with sticky fiberglass
drywall tape. Now cover the exposed inside with drywall tape as well.
This is enough to hold the evenness you used to run the carbon yarn
around the pipes. With 12k tow this stuff is a fast high build tape for
things you don't want to bend.
Dndeeley at aol.com wrote:
> Hitting something hard. Were the boards exit the hull there is a very stout
> keel of, 15" deep and 6" wide. The upper aspect is embedded into a 3/4"
> bulkhead. On a very fast impact the board is going to go. But is so solid I
> don't that happening.
> Norm Deeley
> Multihulls mailing list
> Multihulls at steamradio.com
More information about the Multihulls