4'/1.2m on 40,000 'lbs/5.5 tonne metres is doable. Harry is 5 tonne
metres and 1.7m, so you are going to need a heavier mast and more
beefing up of the lee hull.
Need to talk to the engineer, but for
estimating purposes add 10% to the mast weight/cost and an extra layer
of 600 db to the lee hull between the beams. Given that harry/Aroha is
pretty stable, you could also look at reducing the beam or the weight
in the ww hull.
rob
Hi,
In a fairly recent posting, Rob mentioned that the amount of bury you
need for the mast isn't really related to the height of the mast, but
to the righting moment. Is there a rule of thumb that I can use for
checking the feasability of my layout? Current, I am looking at a
righting moment of about 40,000 ft-lbs to lift the ww hull. If
possible, I would like to do this with a mast bury of only 4'. Is that
reasonable?
Thanks,
- Gardner
York, PA