Hi Rob,
I hope this gets to you ok as I'm just replying through my e-mail (Yahoo account has apparently been deactivated due to lack of use...)
Really excited to see this and and am really looking forward to the opportunity to have a go at a racing Proa before I get the chance to build one!
I've just got a few questions having spent a lot of time thinking about and drawing pictures of a very similar design concept for coastal racing (coastal classic NZ, Three peaks Tas, That sort of thing) then having a go at the solo trans-tasman.
Anyway my thoughts...
Have the Harry main hull shapes (all very similar) been tested in large waves at high speed in all points of sail? The reason I ask is that it seems to me that despite the extended waterline of a Proa they could tend towards pitch-poling due to the lack of underwater rocker which promotes lift in the bow and little buoyancy in the bow for ploughing into the back of a wave when travelling at pace off the wind. There is always going to be a tradeoff between wave piercing and opening yourself to the risk of pitchpoling I suppose. Also the flat deck and bottom would inhibit its ability to pop back up once it was bow down. I've noticed in the photos I've seen that they do tend to sail bow down (Due to the Rocker?)
All of this is not an issue in flat water but once you get out into swell it could become a bit hairy.
The rig configuration is pretty close to what I had in mind except for a few little things. First raising where the wishbone attached to the mast like the Wylie cats to give more shape adjustment in the sail and also gives an auto flattening and ease of the sail in a gust as the boom tries to lift (like an auto outhaul and sheet release). Also have you considered adding the ability to raise a screecher or Gennaker (also like the Wyliecat 44)
http://www.wyliecat.com/models/wylie_44.html. Great for light off the wind conditions.
Is the windward hull so bulky to give it enough buoyancy for getting caught aback? Would you consider making it more wave piercing and if required slightly longer? This would give a much smoother ride in bigger waves when even if youre flying a hull you are likely to be ploughing through the peaks of waves.
Just a few thoughts that I thought could be worth considering.
I reckon its a great Idea and will hopefully open the worlds eyes to the potential of Proas.
Good on you for making it happen!
Cheers
Matt