Lots of questions…but here goes.
Meatbomber, the rocker is to add displacement to the narrow boat (wide/shallow, narrow/deep) while keeping the ends up for better tacking…submerging the bow and stern seems to make it resist turning, as you might expect. With Footys, you have to accept that they are unlikely to be the most graceful looking boats…for that, build a 10R '-) The sheer is to raise the bow height for reserve bouyancy because Footys like to dive going downwind…also because I think sheer is prettier.
Scott, if you printed on legal paper at 100% it should be fine…the leading edge of the fin should be 230mm.
Performance looks good overall, but it hasn’t been tested in real competition.
Probably not faster overall, but maybe in light airs…I think we have seen that the speed limitation of Footys is their size, and many designs appear to be equally competitive…but I keep looking for the best combination of the myriad design tradeoffs.
It points beautifully, and sails hands-off upwind even in chop like the pics…Scott Spacie took them while sailing in pretty strong wind.
It doesn’t submarine at all (LOL) except in big gusts…actually I’m quite happy that the reserve bouyancy in the bow does it’s job pretty well. The price is more bow wave than I like under certain conditions…I’ll be working on that. See attached “outtake” pics. Submarining does not appear to be exascerbated by the high rig.
Here’s some comments from Scott: “Bill, This morning, at 2:24, I had an ‘aha’ moment (actually it was more of a ‘duh’ moment). I figured out what caused the handling problems I had had yesterday and how I should have rigged the boat to prevent it. It caused me to reflect on what a great job the Ranger really had done. A lot of the time when I was fumbling with the camera, the boat was sailing ‘hands off’ in as bad a chop as I have ever seen at Heckscher. At the same time, ten miles south, on a smaller, more protected pond, the wind was literally shredding a fleet of Victorias – including the #4 boat at the nationals! As you noticed in the pictures, the bow worked exactly as it was designed to do. The boat never submarined or did the Razor 7 (both of them) trick of sailing happily with solid water back past the mast. I still have no idea of relative speed as I can’t find another skipper to sail against. Orangeburg never thawed, the guys down south had gone home when I got there, and we are back in a cold snap that is too much for me, so that question will go unanswered for a while yet. The red-trimmed rig you saw in the pictures is the B2 one we talked about after the nationals last year. It is half way between the B and the C and was just perfect for winds that gusted in the high 20’s.”
The pros/cons of the high rig are undetermined, so far. Some argument has been made that it might actually improve lift downwind…but I’m not ready to to stake any claims. I did it to clear the box…no other reason.
One of the brilliant things about the box rule is that there’s no free lunch. To increase LWL, you give up fin depth and raise the rig which reduces righting moment…classic tradeoffs. When Roger proposed the box dimensions, I think he got it just right…enough room to play, but ya gotta pay.