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298 F'n Saint

About ProaSailor

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  1. ProaSailor

    Will there be a third wave?

    South Dakota is unfortunately well beyond its third wave:
  2. ProaSailor

    Dylan's New Boat Anarchy,5.010,6,m:fecafWS
  3. ProaSailor

    Dylan's New Boat Anarchy

    I trust that works as well in your part of the world? Rain is welcome here!,45.618,-120.630,7,53.170,-2.197,7
  4. ProaSailor

    70' Cruising Proa....Big Red Yacht

    "native proa from the Taumako island." (no sound)
  5. ProaSailor

    Covid Misinformation Time-Outs

    No, there are many other very good reasons for using an "escort out of the premises" policy.
  6. ProaSailor

    When offered the Vaccine, will you take it?

    White House Blocks New Coronavirus Vaccine Guidelines, Oct. 5, 2020
  7. ProaSailor

    70' Cruising Proa....Big Red Yacht

    Malcolm, I've admired your work and had links to your web pages from my Proa Web Sites page for as long as I can remember: Mi6 Proa The Coanda/Vortex Sail, Variable Geometry Proa by Malcolm Smith MI12 Blue Water Proa Concept 13m "Atlantic" proa (excellent 3D renderings!)
  8. ProaSailor

    70' Cruising Proa....Big Red Yacht

    If the ama at rest carries 25% of total boat displacement with a reserve buoyancy (volume above the waterline) of just three times that (or less), then fully immersed would be 100% displacement of the whole boat (or less, 4 * 25%), which sounds like a reasonable safety factor to me if backwinded. A Pacific proa's ama that is lifting out of the water and plunging back down would be more gentle with more rocker (lower prismatic) and a V bottom instead of a flat or rounded bottom. Source: link to full size image:
  9. ProaSailor

    When offered the Vaccine, will you take it?

    President Trump Has Been Treated With an Experimental COVID-19 Antibody Cocktail. What's That?, OCTOBER 2, 2020 5:18 PM EDT President Trump Received Experimental Antibody Treatment, Oct. 2, 2020 Updated 6:09 p.m. ET Mr. Trump received a single dose of an antibody cocktail made by the biotech Regeneron. The company’s C.E.O. has known the president for years.
  10. ProaSailor

    70' Cruising Proa....Big Red Yacht

    What do you get about "offputting"? Did you not notice the repetitive lies? Or just not care and skimmed over them too?
  11. ProaSailor

    70' Cruising Proa....Big Red Yacht

    Isn't that what I said? Not that it's larger than a Pac proa's leeward hull but with a Pac proa, the leeward hull is the main hull and the only one required to be "large".
  12. ProaSailor

    70' Cruising Proa....Big Red Yacht

    Like catamarans, and unlike Pacific proas, an Atlantic proa requires both hulls to be capable of comfortably supporting the entire weight of the boat. So in my opinion, the claim is definitely to a much lesser degree, if true at all. A catamaran has much more useable space in both hulls than any Atlantic proa I've ever seen, and along with other advantages, good ones sail very well.
  13. ProaSailor

    70' Cruising Proa....Big Red Yacht

    No, but it can potentially outmatch the the load carrying ability of a catamaran of equal weight while maintaining similar performance. The advantage of proas is that the optimised weight distribution allows a greater hull length for the load carrying hull. Proas and other multihulls should be compared based on equal weight. I agree that equal weight is a more meaningful comparison than length. The advantage (greater hull length for the load carrying hull) applies only to the Pacific proa configuration and is lost when half or more of total weight is in the windward hull at rest (or low angles of heel) because both hulls must carry substantial weight depending on conditions. That being said, catamarans (and trimarans) can have wide flat bottoms aft that carry weight very well and reduce pitching. I made this animation many years ago comparing a 43' catamaran to a 69' proa (both have similar weight) and a 59' catamaran. The proa is 26 feet longer than the 43 foot catamaran which is great for performance, but the "small" cat has more accommodation space. A "fat", lower performance proa carries more load but doesn't help accommodation that much. Also, these old images are at the same scale, a 70' proa and a 42' catamaran (28' difference) with similar displacement, accommodation, sail area and cost: