Originally Posted by Nikki Pebble
Thanks for that thought
I had budgeted terminal velocity(!?) at about 5-7 knots through the water
speed of 20 knots. Is there some sort of equation to work it out?
ps already sold my water-ski !
Well, you may get that, but your average would be closer to 4 with such a hull
and sail config. Steel is proportionately heavier by power to weight ratio as you descend in waterline length, and a schooner rig is not the most powerful for a smaller vessel either. For a vessel of that length I would have suggested sloop
is best, or yawl at most. Unless gaff rigged cutter
schooner with a sprit, but that comes with its own issues, and would still be better as a sloop at that length. You would only have half decent power on a reach. Off the wind would be slow, and to windward, better have a copy of Silas Marner to translate to Chinese while you wait.
Of course these are generalisations, and your prospective boat may be an exception. Also, frankly, speed may not be an issue. 4 knots was the average on all James Cook's voyages and good friends of mine from Hamburg have recently completed a circumnav in a 40 foot steel vessel which tended to average the same, though admittedly was a sloop. Weather
windows become a lot harder at that speed however…