Skinny and very smooth. Lw hull is 750 mm/30" high in the middle x 400/16" wide. Tapers to 400 high at the bows, although part of the reason for the 1m/40" of foam on the end is to allow the height and shape to be easily altered if necessary. I hope the bulkheads will set the shape, and making them will take up the next couple of days. Problem is that the hull needs a lot of support unless the decks are joined, but I can't put the bulkheads in with the deck on. Not insurmountable, but I don't fancy making more external frames than I have to.
The beam sits against the mast, with ropes fore and aft to keep the hulls aligned. The lee hull ropes may end up being tubes if the hull is too bendy.
The join is a hinge, but the hull won't hinge past 90 degrees, so the pin is removed and the two pieces fall apart. There is a substantial carbon "hook" at the bottom to resist the upwards load. Picture when the bulkheads are in. The aim was to make it dismantleable for trailering and containerisation, (2 x 6m/20' pieces, 2 by 4.5m, beam at 7m, mast 2 x 10m) rather than shorter for marina use, although I guess you could fold the ends to 90 degrees and it would only be 6.8m long.
Heinrich,
No internal lengthwise reinforcing, but a few bulkheads and ring frames, mainly to support the shape. It is all glass because of the Classe 50 rules, although the way those boats are falling apart, they may have to change the rules. If we don't race Classe 50 (unlikely at this stage, but there is yet another meeting between ISAF, Classe 50 and the French Sailing Federation to decide our fate later this month), and it is too bendy, I may put some external carbon on the sides of the hull to stiffen it up. 10 kgs/22 lbs or so would be heaps.
Robert,
see above for strings and hinges. Theoretically, there is enough uni, as long as the all up weight stays low. Max load on the bows is the weight of the boat, plus a bit if it has surfed down a large wave and buried itself into the next one such that the rest of the boat is out of the water. I am not too worried about it breaking (famous last words!), but if it flexes too much, there could be steering issues.
Weighed the lee hull with digital scales today. Pictures in the Photos section. Centre section is 35.2 for one end and the end sections are 21.1 each, so 112.6 in total. Still have to add the foam bows, 14 bulkheads , the mast bearings and the rudder supports plus some varnish and antifoul, so 160-170 kgs all up.
rob
HI Rob,It sure looks skinny, and smooth.What is the height and width of the lw hull?Don't understand the bit about attaching it to the beam.Wouldn't the shape be set if you put some bulkheads in?Maybe a ringframe here or there, there is some tension associated with this sort of building.I take it the join in the photo will be some sort of hinge?regards,Rudolf----- Original Message -----From: proaharrySent: Wednesday, November 11, 2009 8:43 AMSubject: [harryproa] Re: Solitarry build<jhargrovewright2@
...> wrote:
>
> 180 kilograms = 396.832072 pounds
No carbon in it, so it could have been lighter. However, I put two of the three pieces together today and it looks awfully skinny and there is a lot of unsupported hull. Will do some tests but may end up using a couple of round tubes to attach it to the beam instead of the ropes I was planning on. Will take the bathroom scales tomorrow and get a more accurate ;-) weight of the lee hull bits and the ww hull which is almost ready to turn over to do the foam bows. Progress will slow down a bit as I have to figure out how to get all three parts of the lee hull identical. They bent differently due to a) lighter laminate on the end pieces and b) the overlap in the centre piece is off centre.
Photos of two thirds of the lee hull with decks temporarily bent in the Photos section. Bit less than 2/3rds as there is still a metre/40" of foam/glass to go on the end. Spread sheet of hours/costs also updated.
rob