G'day I need to finish of some new hulls for a Mozzie and am wondering if there is a set position where the trunk has to be on the hulls or if there is an optimum position for it to be sailed by one 70kg teenager or 130kg with crew? If we were to play around with square top sails for our club sailing would that change the position of the trunks? Are the boards straight down or slightly cantered?
regards Jeff

Hi Jeff,

these days everybody seems to put them at the maximum distance aft, there is a measurement on this.

Also most are put in with maximum angle aft as well, this is also in the Measurement Rules. I put mine in straight, to try and get more lift. But I don't think it makes a lot of difference for an old boat, probably better to angle them back to avoid weather helm for a less experienced sailor.

Wouldn't bother with the Square Top, the one we experimented with we couldn't get to go any faster than standard sail . Also square top just makes the bows easier to bury. After all Mossie is fast enough as is .

Thanks Gary that helps a lot. I'll go with the rules. The square top is just a thought to try to get more of the juniors on a mozzy at club level. We had two F16 Blades at our race and we have 4 more juniors that want them but no one will pay for them, so just thinking outside the square.

Jeff, Aft edge of centre board case opening is max 3353mm measured from the bow along the centre line of the hull. If the hulls are beamed take care tape measure is straight. Max rake (aft) of centre board is 10degrees. I measure this using a straight edge on top of the two beams, centreboard raised up above the straight edge, measure the angle between the straight edge and the forward edge of the centreboard (usually a straight edge also). I also check the centreboard cannot be swung forward/aft within its case during sailing thus increasing this rake angle.
Phillip Pearce

Thanks Phillip I've gone with nearly maximum aft

? Kite as a way to get juniors in a mozzie. affordable performance.

The juniors have already asked, if I get a chance to set a kite up before I take it to the Lake Eyre Yacht Club regatta in July, I'll have a go with her then, first I have to find an old spin the right size

Jeff,
I may know where there is a kite to class size. If your interested let me know.

David
Salpicon de Resplandor, 1744

I've sent a pm Dave

Jeff,

have replied, sorry about delay but I am at sea (work) so internet is not always available.

David
Salpicon de Resplandor, 1744
and other boats.

Thanks DKD I now have a spin just need to get it all together and organise a snuffer etc