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surfsailor last won the day on February 21

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About surfsailor

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  1. surfsailor

    Is this the Figaro III?

    It's like a giant Tuttle box from a windsurfer - very clever.
  2. surfsailor


    There's no way the EU13M boat budget includes development costs - are they being gifted/buying a design package?
  3. surfsailor

    Luna Rossa Challenge. AC 36

    Thank you!
  4. surfsailor

    Luna Rossa Challenge. AC 36

    Beneos going Ben Hur in these beasts would be something to see!
  5. surfsailor

    Luna Rossa Challenge. AC 36

    Go argue AC34 in the OR thread. Maybe re-watch the races first. Just for the record, reserve bouyancy does NOT automatically = safety (although it certainly is a factor), and as we saw in AC34, flying all that extra volume around adds to the platform drag. That's why in AC35 the hulls were one design - to avoid the temptation to push past a reasonable safety limit. My other post was about the AC75s - that's what (most) people are discussing at this point. Because it was general - not specific to LR - we continued the discussion elsewhere. But yes - early foiling could well be a deciding factor in AC36 races.
  6. ^ That thing is wild - 25 knots right out of the box is pretty serious!
  7. You’re right - the foils and flaps need to be symmetrical around a central axis, but I don’t see any language in the class rule that limits independent movement. So that adds some control options since - on a T-foil with either anhedral (most likely) or dihedral, ride height can be partially uncoupled from leeway - but it also adds another level of complexity.
  8. Fair enough. I was thinking #1 could work because they could evaluate the foils together, so that any AoA setting on the leeward wing that could produce enough lift to support the boat, the windward wing couldn't generate down force.
  9. ^ Makes total sense to me. There are already so many variables intrinsic to this platform geometry that making FCS uniform across the fleet won't hold anybody back and - as you say - will allow the event authority to mitigate unforeseen safety issues.
  10. @Kiwing You could very well be right - but I suppose that at very low speeds they could be used purely as ballast, and then the windward one is could be out of the water (for maximum RM based on it's mass) by the time the leeward one was used to create lift. So many possibilities, and this is just sub 6 knots! LOL In any case, as far as I can tell there is nothing in the rule that constrains independent flap operation of the two foils (although I believe the flaps on either side of the 'T' need to operate as a unit).
  11. The two ways I can see to prevent the use of hydrodynamic downforce would be: 1) to regulate the 3D shapes of the foils - they would need to evaluate the foils at all flap positions 2) require the flap on the WW foil and LW foil to run off a single control - so both set the same.
  12. surfsailor

    Larry's AC50 Circus

    Always great to have you contribute to the forum!
  13. Thanks for all the relevant info. I'm totally on the same page with you that the rule has enough cooked-in freedom in the foil design section to allow a flap that can produce downforce even though the pitch of both foils (windward and leeward) is the same. At low, sub-foiling speeds (0-8 kts) - where I think using downforce on the windward foil could be very effective for getting these unballasted boats up to launch speed - it would be extremely difficult to monitor. Another thing - since the entire foil arm is articulated (rather than having the foil with adjustable cant attached to a fixed ama), you can rotate the entire hull/rig around the foil arm axis (without it getting any higher off the water) at will during steady state flight. So a possible scenario at speed in higher wind would be heeling the boat to leeward - the downward component of the wing sail thrust would translate directly into RM. At speed, there will be no shortage of available lift from the leeward foil, so here would be another opportunity to potentially load the entire platform up until it explodes. You would need to move the CE down so that you kept as much lever arm as possible - the gantry at the top of the wingsail will allow them to invert the top just like the AC50s, so it's doable.
  14. This. Kite foiling is advanced enough at this point to create a class that will deliver exciting racing that is also great to watch. Windsurf OTOH foiling is still in it's infancy - the fastest set ups still get smoked by a lit slalom board - and the bleeding edge will probably look completely different by the time the Olympics take place - but the current RSX is also a dog, so yeah - it's probably on it's last gasp as an olympic sport even if they DO dump the RSX.