reverses on a penny. why these boats aren't more popular is a mystery. a few adjustments here and there like designing bows on the smaller hull that don't chuck water all over you, and the rudder mounts could be designed more streamlined or higher up to avoid drag, but this is perfect for sailing and using a zig zag direction into a head wind. the semi fixed sails are an awesome idea.
That’s the way it should be,.. no lost ground to windward, cyclical rigging loads, topping lifts, lazy jacks or running back stays hanging up on anything or needing to be fussed with. No high stress maneuvers, convulsing jib sheets etc. etc.
Nothing wrong with the bucket method - err, but do chuck it over the stern on lee side. Was wondering how much impact that drag on the rudder would have on performance - coz its out in the open so. Fun looking boat to sail on though...
I wonder how this boat would do in 5 to 6 bf in a channel between two caribbean islands, with 2.5m side waves and additional 2m swell coming from 3/4 front. My feeling is that the design lacks buoyancy at the lee hull ends. Newer harryproa designs are better in this regard.
Looks like fun....for about two hours....on a flat bay.... with an air temperature of >85°f....and you WANT to get SOAKED. 😎 I pity the helmsman in ANY other conditions. 👎 Do appreciate the simplicity of the sail rig. 👍 JMO
867 5309 the fore board gets locked in the middle position for leeway mitigation, aft board used as rudder. Can raise the fore board for extended downwind runs to save a little drag, but obviously not necessary.
Wow beautiful design and boat. Looks much easier and less daunting to sail too! But boy does it look wet. Does the water always splash up this easily? Has the new harry proa design improved on this? Does it need more freeboard? Thanks for the video!
Dejay Rezme So my understanding of this is that the answer is complex. One part is that the proa hull is just a big canoe: it must preserve each end’s fineness to be a bow. With l/w ratios well over 10:1, preserving a stable longitudinal righting moment is not as simple as it seems - at least for keeping the bow elevated. Many proas (see Russ Brown’s designs, for instance) are designed with a fair amount reserve buoyancy in the ends. Polynesian designs’ crab claw rigs have a lot of dynamic lift on the active-front-end of the proa, which has been noted to help with the bow-down attitude. So back to this design, it has, quite contrary to the need for a lot of reserve buoyancy in the bows, elected to go with short, wave-piercing bows. This makes for not only a very wet ride, but also, in my view, a very dangerous one in bad weather. Long winded, only my opinion. And one I’m sure the designer will take offense of :-)
@@johnnydfred Thanks! Oh I see you mean flared hulls that provide reserve buoyancy and redirection of spray. So the bow doesn't go "down" but stays level and drowns in it's own bow wave at speed. But I figure the only difference in that regard is that they have no rocker like normal sailboats. Yeah his newer harry proa cruiser 50 also has no flared hulls. But the advantage is that you have symmetrical hull molds for up/down/front/back and a simple tube with straight walls as internal living space. Simpler to build. I would think you get the same reserve buoyancy with taller hulls so they dunk more and the motion is more linear / softer. And these hulls are about 2m tall. But I would suspect (and I'm really not qualified to have an opinion) that it's a rather wet ride. Maybe some added strakes would help.
Dejay Rezme yes partly right. First, strikes have only minimal effect on keeping bows from diving. And there are many conditions and reasons for bows to bury more than, let’s say, below the normal waterline. Consider all the force from a sail driving a hull forward. For western sloop rigs with full roach mains and hefty fore sails, that driving center of effort is well above the deck level. So next, consider how much of the hull is below the waterline, in volume. As the sail drive applied force forward, a hull reacts as a vector force drives it down with more buoyant counter of the additional hull volume. For flared bows, that counter is substantial, adding much more buoyancy than straight sided bows (or worse oval shaped bows). Flared bows also add a certain amount of dynamic lift.
