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I have been told a few times by learned authorities that schooner rigs don't point well :-)
Yesterday it was a Foundation 36 (well equipped quick keel boat which they use for the Match Racing championships here). About 5 knots of breeze, we tacked behind him and climbed up and past. Then the breeze kicked in, and the new beam mounted rudder broke. Not enough reinforcing onto the drum. Easy enough to fix and before it happened, we proved that beam mounted rudders do work. (13 knots in 10 knots breeze). Makes the boats even easier to build, although because of the small amount of bury on the rudder shaft, the loads are very high.
I'm liking that polyprop honeycomb more and more. Certainly for any simple curves. I am not sure how much more expensive it is and have asked for pricing for comparisons but it has to win when you consider effort, weight and resiliance. There is the extra glass needed, triaxial rather than double diagonal, and pssibly extra resin- though the choice of facing there shouldn't be too much difference.
The polyprop does not soak up resin, as there is a barrier between the scrim and the honeycomb. Not sure it would withstand vacuum, though. The price of kiri has gone through the roof, so polyprop looks pretty good. A discount kicks in at 50 sheets, so maybe we could combine a few orders and get it cheaper?
The bow section of the boats is not highly loaded. You could use double bias, with a strip of uni top and bottom and on each side back to the beams, then triax between the beams.
Hi All, BacK after a while. See the list is somewhat quiet. Must be all building or sailing I guess. I see Farrier is finally going to make the 22 footer...
Sailing in my case. Tried a beam mounted rudder today. Steers the boat very well, but a few details still to sort. Max speed 12 knots in 10 knots of breeze...
ed to design a foil suitable for getting the ww hull up on the plane. I think it can be done but becomes pretyy mechanically complex as you have to have means...
... boat very well, but a few details still to sort. Max speed 12 knots in 10 knots of breeze so I am slowly getting the bugs out. Went past an International...
I have been told a few times by learned authorities that schooner rigs don't point well :-) Yesterday it was a Foundation 36 (well equipped quick keel boat...
... Yes, shotover II didn't (doesn't) 'point' well. When Adrian Rogers sailed it I observed that he 'pointed' a bit lower than the boats around him. His VMG to...
... hull. No foils required. ... After exploring how to stick a foil on, that is clearly the better option. Still, I had to do the mental exploration because...
If using polyprop honeycomb, the vertical strip as used by Farrierlooks pretty good, Yes, but glassing the bottom and topsides in one side full length on a...
Checked out prices and engineering details of polycore. 2.6MPa compressive strength and 0.5MPa sheer seems pretty good value when 2/3 the price of Kiri strip...
G'day, Spoke to Bob August at Polycore yesterday. He reckons vacuuming is no problem, resin into the core is minimal. I am not sure we (or anyone else) have...
I was looking at the shape and reckon it could be accommodated by three conic sections without the revesse sheer and five conic sections with. The top could...
The unknown question is how much will it compound so that flat shapes can be tortured into the required shapes and the effect of cutting darts to facilitate...
-I was wondering if the property of epoxy resin softening slightly if raised above its initial curing temperature could facilitate the torture. Have the...
G'day, I have copied this to Bob August who can answer these questions. I made up a trial piece of 19mm with 400 double bias on one side the other day. Bent...
No prices on Arripiado (they keep getting paid for big cats, spec proas go on the backburner) or Elementarry (quite possibly going to be the best finished...
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