Charlie P Mayer

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Everything posted by Charlie P Mayer

  1. Charlie P Mayer

    C-Class Little Cup news

    Re: Rocker I wonder if Rocker influenced Michele's design of the S9. Wand, foil and flap are remarkably similar to the S9. Would be interesting to see how Rocker's hinge is built and how it works. S9 cants rudder and main foil outward - but at different angles. Is this dihedral or anhedral? Why? I don't understand when a fence (end plate?) works and when it just adds drag. S9 has limit of 22 knots - would it be faster with shorter span and end plates? S9 has little rocker and a square stern. Seems immaterial when foiling, but seems draggy in very light displacement conditions, even with body weight forward of the front beam. Tow testing: tried it a few times. Thrilled a couple of young Laser sailors last week - we now hand-hold the the tow rope - easier to bail out.
  2. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    I started with two S9s. Port hull on one was crunched by an F18 last May 11. Starboard hull on the other one was de-bowed by a motor boat last June 21. A little hull-swapping and I ended up with "Lucky" - the two good hulls. Been sailing that one in Texas and in Miami since last June. Seventeen months later the double-crunched "Phoenix" is re-born - first sail Saturday!
  3. Charlie P Mayer

    Whisper Foiling Catamaran Sailors

    Martin: which one should I bring?
  4. Charlie P Mayer

    Whisper Foiling Catamaran Sailors

    vaplaya: Yes, I prefer slide-up rudders like in my old Sprint 750 or Martin's new UFO - as long as a "fuse" is included. The Sprint had nothing like that. The "fuses" in the S9 rudders are bendable rods pushing back on the top of the rudder and frangible plastic "landings" for that rod to "nest". Michele sent me replacement parts for both - but I haven't had to use them. So far I've not broken the plastic landing, but I have bent the rod. Just bent it back and went on. For coming ashore, the old cat sailor trick that works best is to sail upwind of your landing spot, raise the rudders and boards, sit well forward, then sheet in. Works on any cat I've ever sailed. Drift backward until you can get your feet on the bottom - rudder damage not likely unless you are in big waves. The S9 "fuses" described above are only in play for groundings. It seems that both the Whisper and S9 hulls are okay with rudder groundings. I think high speed foil groundings will be traumatic in both boats, but not any different than floaters that ground at speed. I saw an F18 that sliced its boards into the hulls about 6 inches after a good grounding, so no difference there. I think a grounded A cat would be about the same, but I have no direct knowledge of that. Launching: I think there is a video of the S9 beach launching in Miami with rudders and boards fully up, steering with main/jib sheets - no different than floater boats. Pretty sure the Whisper acts the same way, but I didn't get a chance to experience that. What is great fun is experiencing this foiling thing with different design philosophies and observing quite similar results. Why is no one mentioning the wand positions on the various boats? My apologies to all the designers who spent many hours of analysis, but perhaps, just perhaps, it makes no difference in practice vs theory? Hell I'm just a hack, I just report what I observe. Please watch the videos - maybe you'll see something I missed. vaplaya: come down and sail with us in Miami in January - I think you can sail on at least three different foilers - would love to get the Roberts guys back to actually sail instead of just looking - fascinating dudes!
  5. Charlie P Mayer

    2018 Texas Centerboard Circuit

    Wurstfest: if anybody knows MARSHALL MCKENZIE would you please have him correct his WF registration handicap? Zero is probably not correct. Thank you!
  6. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Need comments please: considering keeping the S9 at “shake a leg” and I know nothing beyond what the website says. Comments?
  7. Charlie P Mayer

    Steve and Dave Clarks Unidentified Foiling Object

    Martin: great to see such high quality sailing videos with Alessandro! I sold “Squirt” because she just wasn’t the right boat for light-wind lake sailing. (ask Dave!). Amazing how alive she became in your Miami winds! Keep the videos coming - we all learn from them. My 2 cents: when your butts drag, keep sheeting in! You will likely pop back up and haul ass - don’t give up! Dave?
  8. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    One S9 will be moving to Miami - PM me if you want to sail it there.
  9. Charlie P Mayer

    AC75 vs F50 and Maxis

    Tornado-Cat: I had not heard about Michele's "dangerous above 22 knots" statement, but it does make sense to me. Thank you for posting that. Call it close-coupling, foil-base or whatever your heart desires, but when the main foil and the rudder are only about 52 inches apart, you get a pretty sensitive helm at speed (we have videos). The Whisper's much longer R-F distance feels quite different in comparison to the S9 - analogous to the driving feel of a 4-door Jeep to a 2-door Jeep. Probably wrong thread for this - my apologies.
  10. Charlie P Mayer

    AC75 vs F50 and Maxis

    ...........or an S9, sailing with a Whisper in Miami last month: https://www.youtube.com/watch?v=48W8y8sfWXo
  11. Charlie P Mayer

    Steve and Dave Clarks Unidentified Foiling Object

    Champlain Sailor: I think Martin can steer you to really comfortable and convenient lodging.
  12. Charlie P Mayer

    Steve and Dave Clarks Unidentified Foiling Object

    I did glue a metal protector on the main flap to prevent the rod from piercing the flap. Multiple tries - all glues failed. Would probably be better to add a "foot" to the rod - perhaps the end of a bicycle spoke? Martin: great videos! Those coastal winds really wake up the UFO! Our Miami event was so satisfying in many ways - people, venue, food, drink, you name it. What a great place to sail. I am seriously considering bringing one of the S9s down to stay there. Is the rowing club interested in another tenant? (would work great for a future owner, too)
  13. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Martin: yep. About 300 posts ago the A cat crowd couldn't believe we were sailing the S9 without foot straps. The videos show they are not needed.
  14. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Martin posted a good video of the event: https://youtu.be/s7se26iVoUo?list=PLoO1STST8XYTq6zh2qfXKZ1QV7TzAUd-3
  15. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Everyone: sorry for all drivel on here, but we were pretty pumped. Will take awhile to process everything. Our group included a Psychiatrist from Minnesota, a businessman from Austria, a software guru from Argentina, a Mechanical Engineer from Italy, an enthusiastic and helpful 8-year-old boy, and a wordy old retired fart from Texas. The exchange of ideas on land was great (really good bars and restaurants down there), but to actually transfer to other boats out on the water was the highlight of the trip. Sailing another boat for five minutes gets you an education that you just can't get through words. We need to do more events like this - collaborative, not competitive.
  16. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Martin, I am just fishing for general comments. In your video montage you showed the world how we swapped boats without a chase boat and you documented three completely different approaches to achieve wand-based foil control. Fun to see the interaction of a Dad with his happy son. It's very interesting to read the formal papers on foiling and to share opinions and experiences in fora like this, but videos like yours pretty much show that all three approaches work. Pretty sure other methods are workable, too. Parallels to aviation's early days come to mind. Breakage: no major breakages occurred - not more than one hour of sailing was lost due to breakage - we lost much more time to the tropical storm and the lightning. Cobblestones: yes! that's the feeling. The Whisper had none of that - quiet and smooth. I never foiled the UFO enough get that effect. The S9 can be damped by slacking the bungee providing downforce to the wands (cleat in the middle of the tramp). That may affect ride height. Easy to document by video - need wind, though. Cobblestone effect to me just means that you are going fast - nothing else. Don't see how it can have any other benefit. Perhaps someone can educate me. Interesting to note that there are no foot straps on the S9 or the Whisper.
  17. Charlie P Mayer

    Whisper Foiling Catamaran Sailors

    Fantastic video - thank you Martin!
  18. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Remember the discussions about wand placement? These clips were filmed on flat water, and it might be different in chop or swell, but do you see any differences here? FYI: "foil base" on the S9 is about 54 inches. Whisper appears to be about double that. Difference shows up in helm sensitivity and ride quality. Your thoughts? https://youtu.be/48W8y8sfWXo
  19. Charlie P Mayer

    Whisper Foiling Catamaran Sailors

    I hope to get more time on the Whisper in the coming months - just a beautifully engineered boat. Mast and main looked huge. Thank you for sharing Martin!
  20. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    4:1 ! I could barely move it at 6:1.
  21. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    A few more notes: the S9 with Code Zero can develop severe lee helm - you must sheet in the main to get it back to neutral or slight weather helm. In this case you are sheeting in to balance the helm, not to trim the main. I rake the rudders back slightly to compensate, but if you then sail in higher winds, no code zero, without moving the rudders back, you get too much weather helm. Martin, we were sailing with the rudders in "code zero position" and with the resultant weather helm. Two turns on the adjuster - on the water - would have fixed that. I don't what I was thinking when I said "just sheet in". That was a bad answer. Sorry about that.
  22. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    It was just too much for me to pull it in quickly - I should have let Alec handle the main (as Martin suggested).
  23. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Fastest runs fromTuesday: https://youtu.be/2s87C6amAnA
  24. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    As Martin said, with me and Martin driving, the S9 in those conditions was a markedly faster boat. I have no idea why. The videos will show that the Whisper tends to drag the sailors butts in the water. On the UFO the solution is to sheet in quickly and let the sail pull you up. I suspect the Whisper will respond similarly, but that huge mainsail only had a 6:1(?) mainsheet and I was far too wimpy to sheet it in fast enough. End result is you have to really honk on it, but it does eventually right itself and foil nicely, but you lose a lot of time getting your butt out of the water. The S9 is not a good light air boat. That's why the jib and code zero were added. The Whisper may have an edge in light air. The S9 requires a lot of foot work fore/aft and a lot of coordinated tiller work to keep things level. Can't do that while sitting on the hull. My summary below, not quite the same as Martin's (but that's why we have both chocolate and vanilla): The Whisper is a highly-refined high power machine that takes more skill and strength to sail quickly than the S9. Perhaps the fittings and such are lightened to the point that failures occur - but isn't that what you expect on something like this? The S9 target sailor is the more mainstream club-type sailor. Ex Hobie-catters, old people, those who rather just fly around the bay than race Alan Ashby. Accordingly, the S9 has proven to be quite durable if you keep it away from F-18s and power boats. The penalty is a few extra pounds (~190 pounds with jib and code zero). A good tradeoff to gain durability I think. Anyway, going to work on more videos - next one will show my fastest and Martin's fastest.
  25. Charlie P Mayer

    14' Stunt S9 Foiling Cat

    Please read this before you watch the video; This is boat abuse: max recommended is about 210 pounds. We are sailing at about 335 pounds body weight, plus wet gear. Crew is Alec Bollorino, moved here from Italy, Civil Engineer building big things in Miami. I am half deaf and I don't speak Italian, so you might pick up a few miscommunications in the video. Alec is trying to sell his rotomolded Hobie so he can buy an S9. If you watch the speeds, you'll see that Alec achieved a higher speed than I did. S9 is NOT set up for people sitting on the hull and foiling. You simply cannot shift your weight quickly enough to keep the boat level. Please don't try this at home! https://youtu.be/2zwSAkdFl5Q