Unfortunately I'm too busy doing real work right now. 🙁
You can buy the structural closed cell poly foam (airex or other brand) from many sources (don't have any handy right now). Or make a mold and use the 2 part expanding foam stuff from US composites. http://www.uscomposites.com/index.html
Cheaper alternative is to get some western red cedar or balsa blanks for the main body and glass it with fiberglass, carbon or carbon/kevlar. Its denser than the foam, but with a 30 year old boat weight isn't the most critical problem. In the case where you are glassing the blanks having a CNC router would be a huge advantage over having to sculpt them yourself!
There are some good instructions and videos on how to build the foils here: [url=http://http://www.uk-cherub.org/doku.php/tech/howt o"> http://www.uk-cherub.org/doku.php/tech/howto ][url] http://www.uk-cherub.org/doku.php/tech/howto . Toughest thing would be if you want to vacuum bag them to get more strength out of the fiberglassing. Again probably not essential if you put a couple more layers on. I have a guy here who does sailboards that I might try and sucker (convince) into making a set of foils for me.
Dave Bonin
1981 Nacra 5.2
Here is the supply place i was thinking of to get the foam and other supplies: http://www.noahsboatbuilding.com/noahmain/index.asp?url=IND Of course it's in Toronto.
D.
Dave Bonin
1981 Nacra 5.2
yurdle wrote: $778 ?!?! I'm sitting on a stack of these. I'd say early retirement time...except:
They break.
I know of no upside to putting one down all the way on a reach, but I'm no expert.
I've gotta reneg on this.. My 5.5 clearly steers better, with much less chance of the rudders breaking free of the water (cavitation?) if I have the dagger 80% or more down. I solo it all the time, which means I'm trying to depower a bunch, but its still a much better sail with the daggers down.
Rob
Nacra 5.2
OKC, OK
I've had the centerboards on my boat flip up while on a beam reach a few times.
--
Matt
P19MX #1055
Gulfport, MS
Matt922,
Loosen the set screw in the little puck at the top of your centerboard until the fit is tighter and your board won't pop up on you.