4 Meter mono foiler project

Discussion in 'Sailboats' started by wind_apparent, Apr 27, 2008.

  1. wind_apparent
    Joined: Apr 2008
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    Location: boulder colorado

    wind_apparent wind driven speed addict

    nice vid


    (from the M4 site)

    Specification
    Waterline length: 4m
    Overall length: 4.25m
    Beam (hull): 0.4m
    Beam overall: 2.4m
    Mast height: 6.5m
    Sail Area: 9-10 sqm
    Hull Weight: 20kg
    Sailing weight: 45kg

    well, the all up seems to be about 10lb more, and the sail area looks to also be about 11-22sqf less. so if the M4 goes, so should the SR-71. It almost makes me want to put more sail on it, but having more canvas than a MPS would be silly.
     
  2. Doug Lord

    Doug Lord Guest

    Your SA is 10.75 sq.m, right?
     
  3. wind_apparent
    Joined: Apr 2008
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    wind_apparent wind driven speed addict

    11sqm
     
  4. wind_apparent
    Joined: Apr 2008
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    wind_apparent wind driven speed addict

    I was talking to a windsurfing buddy today about a new sail that he just purchased (he now has a quiver of 9 different sails), it got me thinking, what do you all think about having three sails available for a boat like this? maybe 12.5sqm 11sqm 9.5sqm like windsurfing. So instead of 1 max sail size. 3 different sail sizes. I know its alot of $$$$$$ to start off, but after your buy in, all the sails would last longer. I was thinking about it because this is a foiler, so you want it to foil, 12.5sqm turns a nonfoiling day into a foiling day, 9.5sqm turns a overpowered day into a ripper, and the average 11sqm will work real nice in your 10-15 blow. Just a thought.
     
  5. Doug Lord

    Doug Lord Guest

    Good idea,but why don't you come up with a viable reefing system? The RS600FF rig is reefable-when the boat was sailed as a seahugger that system was hardly used -now that it foils they're finding it invaluable.
    ----------
    "So we started developing the RS600 and seeing how it would convert to being used for foils, and I have to say Clive Everest [the original designer of the RS600] designed virtually the perfect boat for foiling, although he probably didn’t realise it at the time! Now with the RS600FF, we have a foiling boat that works for people weighing between 70 to 95kg, it’s one-design, and with the original RS600 reefable rig you can sail the boat a long way up the wind range.”
     
  6. wind_apparent
    Joined: Apr 2008
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    Location: boulder colorado

    wind_apparent wind driven speed addict

    a reefable sail is an option, but I do see it having some drawbacks:

    A) don't think it would work very well with the Pocket luff/camber induced sail technology
    B) windage windage windage
    C) the 12.5sqm would only be used on the lightest days, so the sail would be reefed a lot.
    D) I hope to move back to the Portland,OR area soon (within the next year), so I probably won't be needing a bigger sail myself. (read GORGE)
     
  7. Doug Lord

    Doug Lord Guest

    12.2 sq.m would be the same as the RS600FF-what a power to weight ratio you'd have then....
     
  8. wind_apparent
    Joined: Apr 2008
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    Location: boulder colorado

    wind_apparent wind driven speed addict

    Read; Scary
     
  9. Doug Lord

    Doug Lord Guest

    Fear breeds courage(sometimes)
     
  10. wind_apparent
    Joined: Apr 2008
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    Location: boulder colorado

    wind_apparent wind driven speed addict

    so does stupidity. (sometimes) :D
     
  11. Paul B

    Paul B Previous Member

    But if YOU don't design a working reefing system for this type of boat then how will the **** **** be able to use it on his imaginary foiler?

    Design it himself you ask? I'll wait for the laughter to die down now...
     
  12. wind_apparent
    Joined: Apr 2008
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    Location: boulder colorado

    wind_apparent wind driven speed addict

    Cutting

    well, It has begun again, cut out the strongback/frame today (the real one this time). Scott "Murf" Murphy doing what he does. Hopefully I'll put it together tomorrow.
     

    Attached Files:

  13. yachtyakka
    Joined: Jun 2008
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    Location: waiheke

    yachtyakka Junior Member

    here are the latest images of the R class
     

    Attached Files:

    1 person likes this.
  14. wind_apparent
    Joined: Apr 2008
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    Location: boulder colorado

    wind_apparent wind driven speed addict

    that's a great boat, very nice renderings. Hope it has a wide enough appeal to where I can take a spin on one in the States some time. Do you know who is heading up this project?
     

  15. foilman24
    Joined: Aug 2008
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    foilman24 Junior Member

    It looks like the revolution is on its way, and none of dougs "boats" are anywhere in sight. We have a single handed dinghy (moth), a singlehanded trapeze dingy (Sr-71), a two handed foiling skiff (R class), and an all out 3 man super foiler (mirabaud). so where are you going to fit in doug? better start your dumb canting keel sports foiler before theres nothing left for you. :D
     
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