• Announcements

    • Zapata

      Abbreviated rules   07/28/2017

      Underdawg did an excellent job of explaining the rules.  Here's the simplified version: Don't insinuate Pedo.  Warning and or timeout for a first offense.  PermaFlick for any subsequent offenses Don't out members.  See above for penalties.  Caveat:  if you have ever used your own real name or personal information here on the forums since, like, ever - it doesn't count and you are fair game. If you see spam posts, report it to the mods.  We do not hang out in every thread 24/7 If you see any of the above, report it to the mods by hitting the Report button in the offending post.   We do not take action for foul language, off-subject content, or abusive behavior unless it escalates to persistent stalking.  There may be times that we might warn someone or flick someone for something particularly egregious.  There is no standard, we will know it when we see it.  If you continually report things that do not fall into rules #1 or 2 above, you may very well get a timeout yourself for annoying the Mods with repeated whining.  Use your best judgement. Warnings, timeouts, suspensions and flicks are arbitrary and capricious.  Deal with it.  Welcome to anarchy.   If you are a newbie, there are unwritten rules to adhere to.  They will be explained to you soon enough.  


  • Content count

  • Joined

  • Last visited

Everything posted by msouth

  1. Canting of rig might be good, but to make it practical and safe a differential sheeting system arranged on a track must be in place. Instead let the foil take the rig loads,
  2. Just as a reference, I was just reading the racing rules for cayak boats, they are open to use any build material but foil mounted on rudder is not allowed, this may be an indication that the drag is not an issue using rudder foil.
  3. In the T-35 case, make sure you use open mesh nets.
  4. A t-foil on the rudder may create some drag, but onthe other hand it can be placed so that it is surfing on the backwave crested by the main hull in lower speeds sah less than 9 knots, then it actually behaves like if the main hull was a bit longer in the waterline And move the deplacement speed up a bit.
  5. T35 =Sc30 in speed. My add on foil to the daggerboard end is not adding much strain, but also add lift even when daggerboard is not fully submerged, So it creates lift sailing fast with say 50 % or less dagger down
  6. First of all, stay away from monohulls they are too boring, I trailer a Catri , 8 x 8 m trimaran , 1200 kg trailer weight, I use a 2 wheel 1800 kg total weight trailer. The Catri fold like farrier and has seperate bathroom and seperate aft cabin, 1.89 m headroom. http://multihulls.org/?page_id=200&id=249.
  7. Neutral Helm

    Take the wideness of the trimaran into the calculation, it will balance out as the force of the rig is not 90 deg to boat moving direction It is more forward in direction.
  8. Trimaran Foiling Systems

    Just note that , flying is not a permament mode,there is always some assisted mode involved.
  9. Trimaran Foiling Systems

    The foil system is based on arrow configuration, reason is - well try throw a dart arrow and watch how instabile it gets.... if you remove the rear wings... .
  10. Trimaran Foiling Systems

    There are many more, SeaCart 26, C-foil Catri trimarans, 5 foil / and T-foil FARRIER F-85, C-foil Windrider T-foil Hydroptere / foil, T rudder
  11. TF 10 Foiling Trimaran

    DOA = Dead On Arrival ?
  12. Foiling question - (I know...)

    Are there anybody out there that still do not like foils ?
  13. TF 10 Foiling Trimaran

    Will $ 300.000 buy it ?
  14. TF 10 Foiling Trimaran

    NICE, and nice spec, just one little number missing called price !
  15. Foiling question - (I know...)

    I can confirm that it is correct, I flew ones from Newyork, NY to Lynchburg , VA in a Saab 340 turbo prop. The flight was about 1/3 booked (but not cancelled ) and the captain told us passagers to use only the seats in the very back of the vessel If we wanted to save 15 min flight time. And so we did, Also I have tried a trim tab shim on my Catri 26 on the aft foil, and setting negative slow things down.
  16. Foiling Stability and Control

    HYDROFOIL SURFING is the safe way, equvivalent to ground effect flying, no crashes ever.
  17. My Ama's Aka's squeak :( Help!

    Always wondered about those pressure pad, why not just have a metal to metal connection, absolute steady and sit Still like a rock.
  18. Foiling: Controlled Jumping?

    One thing has to be concidered very carefully, that is scale vs stability, For you that fly RC helicopters and fly real helicopters, it is 2 worlds, the RC helicopters need and has gyro stabilizer a real chopper do not need that due to it's size, it has a complete different stability acceleration.
  19. Foiling question - (I know...)

    Having sailing experience of 15 years with foils, the conclusion is that pitch damping is more or less insane strong, the main foils beeing dihedral 45 deg.(V-foil) And rear foils anhedral 10 deg, rudder foil just horizontal T-foil.
  20. Foiling question - (I know...)

    Here an example of main foil moved forward, The Catri trimaran is 8meter , the distance between main and rear foil is 6 meters, This simulate the pitch damping of a 12 meter non foiling vessel on a 8 meter boat.
  21. Centreboard removal

    The corda of a Black Hawk chopper main rotor is 0.53m, made of glassfiber, (carbon is to weak). Forget about durability, they will never break! They have interesting twist for foil applications.
  22. Centreboard removal

    It seems like great idea, free up some space in the mainhull and only have 2 maintenace fiendly daggers in outriggers, If the daggers are foils like C-foils they will have assymetric profile which will provide lift and anti drift, They can be smaller in size than a symmetric main hull board. Do some calculations on weight savings.
  23. Foils

    The white/green part is inclined 45 deg, 90 deg to the grey part. Acting "winglet" and uptip lifting surface.