Nothing fancy about the folding for the competition boat. The beams are fixed to the hulls and have horizontal axis
hinges about 1m and 2.5m in from the lw hull. The ww hull rotates through 90 degrees when folded. Means
the cooker, etc has to be removed before folding (or stored in a net), but this is not a big deal on this sort of boat.
Folding can also be done keeping both hulls upright, but is not worth the complexity for this spec.
Una/schooner/ballestron all work, which you choose depends on what you want.
ballestron has lower sheet loads.
Una is better in the light (higher) and simpler.
Ballestron and schooner are easier to shunt, but with practice, this is not an issue.
Schooner is most expensive, una least
Schooner opens up lee hull
Schooner is structurally a little better as the beams take the loads.
Actually, there is not much in this as the design load is one mast applying all the load.
Most performance classes with total sail area limits (moths, A and C cats) go with una rigs,
especially if they can also use a wing mast or pocket luff. Jibs are good for extra area on a limited height mast.
The competition boat will be schooner to open up the lee hull for the toilet, an optional bunk and to keep
within the 40' trailer length requirement. There is also the likelihood that the judges will not understand
shunting, so will assume a schooner does it best. However, if the telescoping works (should know by April),
then it could change.
The competition boat description is full of options depending on exactly what the end use will be. "Raids" vary from
24 hours both crews on a trapeze to modified shoe boxes floating down current in company discussing
the best way to brew lapsang souchong.
rob
i'm definitely interested in seeing the drawings.
am particularly curious about how it collapses onto a trailer.
by no headsail, do you mean unarig?
i've been wondering why visionarry and harry have balestrons yet solitarry and elementarry have unarigs but haven't come across an explanation in the archives. the COE is more offset, so you have higher sheet loads and have to raise a rudder to balance the helm. there is no slot, which in my experience with sloops adds a lot of power. besides simplicity, what is the benefit?
ben
> Above was written yesterday before a walk along the beach and a
> doodle. Specs are:
> Fast, BN about 2
> Easy to sail, no extras or headsails.
> Very quick from arriving at ramp to sailing. Tieing it down/untieing
> it should be the longest operation.
> Seaworthy, (5m wide, 10m long),
> comfortable, sheltered seats
> 1.8m wide on the trailer (almost as high as an F27, unfortunately)
> 3 bunks, although one of them will double as a galley bench
> Rightable without getting wet. Bit of trickery and it could be self
> righting/uncapsizable.
> Built from flat panels, with compound curve (I think, will need to do
> some samples)
>
> Drawings to those who want a look when I have the details sorted/completed.