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Thread: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sail...

  1. #36
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Inside-painting from frame forward.
    Placing and gluing foam-panels at this zone will be next.

    IMG_20190414_161105.jpg
    Hay mas tiempo que vida!

  2. #37
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    It's coming along very nicely. I'm curious. If it separated from the mothership, would it float the motor?
    -Dave

  3. #38
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Thanks Woxbox. Good to see Senior Members watching my project.

    Separation from mothership should not happen, as shoe will be bolted/secured to mothership with three strong bolts. One into skeg, two between splash-well and transom of mothership. May be two more small bolts through frame #4 of mothership, near gunwales.

    But, if accidentaly, "shoe" gets separated from mothership, shoe has enough buoyancy to float with motor attached. Motor (Mercury 5 hp) weights about 30 kg ( 60 Pound) and I have built-in already at least 140 Liters of foam-panels into shoe, which means I do actually have 140 kg (280 Pound) uplift.

    Due to the wider and longer stern of the boat I am gaining, compared with the buoyancy-situation of mothership only. This adds safety for sailing in motor-mode and cares for motor-weight and better hydrodynamics.
    Last edited by Pateplumaboat; 04-14-2019 at 05:14 PM.
    Hay mas tiempo que vida!

  4. #39
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Foam panels placed at bottom-transition. Remaining space will be filled using liquid PU 2-component-foam poured from top with mothership acting as formwork, separated with PE-sheets.

    IMG_20190416_101106.jpg


    Panels glued to bottom. Some more foam in aft-part (above waterline, for safety/space-filling only):


    IMG_20190416_121423.jpg

    Excessive foam trimmed:

    IMG_20190416_163621.jpg

    IMG_20190416_163906.jpg
    Hay mas tiempo que vida!

  5. #40
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Bottom-transition secured with screw/pin:

    IMG_20190417_160352.jpg

    viewed from below:

    IMG_20190417_160418.jpg
    Hay mas tiempo que vida!

  6. #41
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Quote Originally Posted by koederfischgriller View Post
    Hi

    Daggerboard Plug obviously.

    i like this kind of "swiss army knife boat approach"
    Changed daggerboard-plug for a more robust solution. This allows to install plug top-down:

    IMG_20190417_151617.jpg

    Fwrd-bracing of daggerboard-case changed. Will need still some bracket and finish-work:

    IMG_20190417_150528.jpg

    Daggerboard-slot viewed from bottom up:
    IMG_20190417_150441.jpg
    Hay mas tiempo que vida!

  7. #42
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Throw her in the water!

    My popcorn is ready...

  8. #43
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Shoe-shell-structureincluding installation of connection-bolts finished:

    IMG_20190418_175433.jpg

    IMG_20190418_162610.jpg


    Transition-zone shoe to mothership (8 mm dia bolt connecting shoe with skeg/keel of mothership visible):

    IMG_20190418_160956.jpg

    Detail transition zone (bolt through frame 4 holds cheek of shoe to plank near gunwales. Black rubber-seal between shoe and water-zone):

    IMG_20190418_160710.jpg
    Last edited by Pateplumaboat; 04-18-2019 at 04:34 PM.
    Hay mas tiempo que vida!

  9. #44
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Looking really good. Any chance we'll see a video of the trials?
    -Dave

  10. #45
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Quote Originally Posted by Woxbox View Post
    Looking really good. Any chance we'll see a video of the trials?
    Thanks Dave,
    yes will to do video/pictures of trials. First launch into Alpine-lake with electric motor (probably will borrow Torqueedo 1003). Planned mid June this year. Test with Mercury 5 hp gasoline outboard in the Laguna di Venezia thereafter in summer.

    But need to slow down progress now, as other more urgent project to be done. Therefore much less frequency of posts in this forum from now onwards, until I restart working on this again.

    Remaining steps on this "shoe"-project:

    - Countersink bottom-bolt and secure transition-plate with pin
    - Cover mothership with PE-sheets to allow separation of shoe for foam-filling-step: Fill remaining voids inside shoe with foam (pour-in from top at gunwales)
    - Cover gunwales of shoe with glued-on ply-sickle. This will give more lateral stiffness to cheeks of shoe, will be installed with flare to shed water and will cover all foam from being exposed to sunlight
    - Sand, varnish, paint. Also repaint/varnish mothership
    - Glue rubberseal onto cheeks
    - Construct trolley and simple wooden-ramp, to be able to load/unload/slip boat onto my standard trailer with small boat-winch
    Hay mas tiempo que vida!

  11. #46
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Some cateye-cosmetics done. Cateyes = splash-well limber-holes = handles for putting shoe on to mothership

    IMG_20190420_180745.jpg
    Hay mas tiempo que vida!

  12. #47
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Now I am continuing my project, building a shoe to convert sailing-skiff "Spike" to 5hp motor-skiff and vice versa.

    Here shoe filled with PU-foam-panels before filling with liquid PU-foam:

    IMG_20190531_141714_resized_20190601_024118818.jpg

    "Mothership" covered with plastic-sheeting to separate hull from liquid-foam to be poured into fwrd. part of shoe:

    IMG_20190531_175105_resized_20190601_024116514.jpg

    Tape fwrd-end of shoe in order to stop liquid-foam to spill:

    IMG_20190531_184214_resized_20190601_024114267.jpg

    Turn-over boat and fill remaining voids (fwrd part of shoe) with liquid PU-foam from top:

    IMG_20190601_150006.jpg

    Cut foam overspilled at top of shoe:

    IMG_20190601_154207.jpg
    Hay mas tiempo que vida!

  13. #48
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Glue bbrd deck-plate onto shoe after foam-filling is complete:

    IMG_20190601_204503.jpg

    and trimmed:

    IMG_20190602_125445.jpg
    Last edited by Pateplumaboat; 06-02-2019 at 06:16 AM.
    Hay mas tiempo que vida!

  14. #49
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Taking off shoe after foaming of remaining voids:

    DSC04989.jpg

    Plastic sheeting, separating mothership from shoe worked well:

    DSC04992.jpg

    Separating sheeting taken away. Foam-filling worked quite well:

    DSC05001.jpg

    DSC04999.jpg
    Hay mas tiempo que vida!

  15. #50
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    How hard did you have to swing Thor's hammer to get it to pop off?

    Looks great, I can't wait to see the pics of it on the water.

  16. #51
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Quote Originally Posted by jcpout2c View Post
    How hard did you have to swing Thor's hammer to get it to pop off?
    Thanks jcput2c, good question!

    Answer: Exactly three times. Falling head 1 1/2 feet = 0,471 meter. Yes, I counted the hits ;-) and used a peace of soft plywood to protect shoe from sledgehammer-impact. Most probably friction at sides of mothership-skeg was main reason. Glad I separated thouroghly with robust PE-membrane and taped all off, as glue to body of mothership would be impossible to get it loose. Using liquid foam-fill as an art by itself, one has to be very fast to get in liqid before foam starts to build-up. On the other hand, very liquid-mix finds its way to every void and hole and foam expands. Needs luck or experience. I was lucky.

    Yes, as promised, pictures of launching will be taken, but I will have to finish/paint first.
    Last edited by Pateplumaboat; 06-05-2019 at 07:28 AM. Reason: typo
    Hay mas tiempo que vida!

  17. #52
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Hay mas tiempo que vida!

  18. #53
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Foredeck filled with PU-panels for additional flotation:

    IMG_20190608_100751.jpg

    Cover PU with 4 mm mahagony-ply:

    IMG_20190608_092326.jpg

    Epoxi shoesole:

    IMG_20190609_200626.jpg
    Hay mas tiempo que vida!

  19. #54
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Preparing simple trolley using my canoe cart:

    IMG_20190611_120917.jpg

    IMG_20190611_121255.jpg

    IMG_20190611_100618.jpg

    Not yet tested! Will see soon if/how it works.
    Hay mas tiempo que vida!

  20. #55
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    just found this! amazing work pate. i think you must be an engineer after all that nice work. i am looking forward to your tests and finally ride in venice. cool trolley!

    jim

  21. #56
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Hi,

    looks great! A "runbehind"

  22. #57
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Painting waterline (just a guess, will see soon if this is correct location).

    IMG_20190613_210653.jpg

    IMG_20190613_211138.jpg


    Plug for daggerboard-slot = fwd seat:

    IMG_20190613_211226.jpg

    IMG_20190613_211441.jpg

    Ready to get wet with her finished shoe.
    Keep fingers crossed!
    Attached Images Attached Images
    Last edited by Pateplumaboat; 06-13-2019 at 04:56 PM.
    Hay mas tiempo que vida!

  23. #58
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    New standard trailer. Made wooden ramp and simple trolley. Sold my previous boat trailer as only used for boat. Now I can use this trailer for other issues such as transporting material, furniture, firewood, waste....


    IMG_20190615_212318.jpg

    IMG_20190614_122809.jpg

    IMG_20190614_122015.jpg

    IMG_20190614_175145.jpg

    IMG_20190614_173510.jpg
    Hay mas tiempo que vida!

  24. #59
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Putting her into water. Re-christening her to "Gualala" (now with shoe!):

    DSC05039.jpg

    First test with small electric motor Minnkota Endura C2

    DSC05084.jpg

    Stability-Test. Boat much more stable compared without shoe:

    DSC05089.jpg


    DSC05121.jpg

    To my surprise: Boat still very good to row with shoe. Even better. Almost 3 feet increase in length does have positive effect!

    DSC05159.jpg
    Hay mas tiempo que vida!

  25. #60
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Videos as promised:
    - First test-drive with small electric Motor Minnkota Endura C2 40. As we cannot use gasoline-engines in alpine lakes I used this motor to see how my project is performing (shoe-system function in general, loading/unloading with new trailer and trolley, rowing, stability, deadwater-issues?, hydraulical behaviour due to transition mothership-shoe...)

    - Project has been designed for use of an 5 hp gasoline outboard. This configuration will be tested in a few weeks in the Laguna of Venice. I expect that the boat will go to gliding-mode with this additional power.

    First time with small motor:

    Last edited by Pateplumaboat; 06-16-2019 at 12:05 AM.
    Hay mas tiempo que vida!

  26. #61
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Stability-test:

    Last edited by Pateplumaboat; 06-15-2019 at 03:54 PM.
    Hay mas tiempo que vida!

  27. #62
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Sailing in front of the wind with small electric motor. Wind about 2 BF. Max V of boat was 5,4 km/h (about 3 knots):

    Last edited by Pateplumaboat; 06-16-2019 at 12:06 AM.
    Hay mas tiempo que vida!

  28. #63
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Excellent!
    -Dave

  29. #64
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Yours has been a very interesting project. Glad to see it working out for you.
    It will also be interesting to see how it goes with the gas motor.
    Thanks for posting your project.

  30. #65
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Hay mas tiempo que vida!

  31. #66
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    Default Re: Building "shoe" for Spike (Oughtred Design) = Convertible skiff to sail-motor-sai

    Found a good place to transport motor and wooden ramp (red) in trailer.

    Cannot mount motor onto transom of boat while trailering. Two reasons: Length-limit what can stick out at end of trailer. Weight on small trolley during transport (dynamic load).

    IMG_20190623_162156.jpg
    Hay mas tiempo que vida!

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