The rope trick.

Discussion in 'Downeast Boat General Discussion' started by HUNTHARD, Aug 6, 2018.

  1. HUNTHARD

    HUNTHARD Captain

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    So we played with 1/2 inch rope from stern cleat to stern clean under the hull yesterday. Boat rides a little bow high so figured we would give it a try. The results we pretty mind blowing. I really feel this hull need to be as level as possible for optimum efficiency and performance. (42 wesmac). Well with 1/2 rope we gained 2 knots the bow came down over a foot and load went down 5%. The boat has two ducers on the bottom right before the transom which were making the rope pop off after a while so we couldn't do it for extended periods of time. Both units are old and need to be replaced. So We are going to remove those two ducers, fiberglass the holes and test again with bigger rope. I am excited with the results and looking forward to finally getting this boat dialed in the way it should be. I would do this just for the added visibility. The speed gain and load dropping is a nice bonus. Need to figure out which route we are going to go. Trim tab or glassed wedge on the hull.
     
  2. GLA

    GLA Senior Member

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    when I was experimenting with ropes I found that I couldn't keep a single rope on for long,
    what I wound up doing was splicing another line into the line that was under the boat
    on both sides close to the water line
    then running those second lines up to another cleat halfway up the cockpit.

    the second ropes running forward prevented the line running under the boat to slip off

    basically looked like a Y on both ends

    guess all hulls are different, 1/2" was way too much for me, stuffed the bow too much

    2 knots is awesome,
     
    GLA,
  3. Diesel Jerry

    Diesel Jerry Captain

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    I would’nt do the glassed in wedge. I would go with either tabs or those interceptors. You will want to keep adjustability.
    Another thought is (you may want to sit down). What about extending to 46 feet? There is a 46 Wesmac that started out as a 42 in the Harbor here where I work. HHe reported almost identical results as you did. No different than the legend of the 30 Holland becoming the 32.
     
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  4. willbfishin

    willbfishin Senior Member

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    And now the 32 holland becoming a 34
     
  5. Old Mud

    Old Mud Captain

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    Cap those are great #'s. If you picked up 2 Kts. and dropped the bow a foot with just a 1/2" rope you probably hit it on or close to the nose. Personally I would go with tabs because with the loads you could put in that pit you have the option of Port to Starboard trim. Also could mean more speed and a better ride. You would be able to dial it in as the load changes.

    One more thing is you can bury the nose a little more when steaming in chop for a better ride. Even if not the most efficient you have that option.

    JMHO.
     
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  6. HUNTHARD

    HUNTHARD Captain

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    if we go the tabs route I would want them recessed like in production boats. I agree tabs is probably the way to go but I don't want to bolt stuff to the transom.
     
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  7. Diesel Jerry

    Diesel Jerry Captain

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    You could do the not so patented Diesel Jerry top secret trim tabs!
     
  8. Old Mud

    Old Mud Captain

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    I agree recessed is the way to go. See if Blitzen / John has some pics. of his.

    I happen to think athwart ship trim is important.
     
  9. Squider42

    Squider42 Senior Member

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    Recessed would be the nicest option, but I would give Humphree interseptors a look. They would stick out about 4" I think, but it would save a big job of cutting a section out of the transom, and reglassing.
     
  10. Blitzen

    Blitzen Captain

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    Don, I don't have tabs but if I did they were going to be recessed.
     
  11. scupper1

    scupper1 Senior Member

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    On the flip side, what about a 38 becoming a 35?
     
  12. Thomas

    Thomas Senior Member

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    I have never heard of this rope trick can anyone better explain very interesting
     
  13. Diesel Jerry

    Diesel Jerry Captain

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    The role trick was invented by lobstermen. Before loading on a bunch of traps a rope would be made secure going down around the transom under the stern. This would help keep the boat down when loaded up with traps. Dad and I used to use a broom handle like a turnakit to get it tight. It made a world of difference when we would have 80 or more traps on.
     
  14. Thomas

    Thomas Senior Member

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    So what it does is create drag would it go at the stern midship or closer to the bow
     
  15. Diesel Jerry

    Diesel Jerry Captain

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    At the stern. We used to do it a foot from the edge.
     
  16. HUNTHARD

    HUNTHARD Captain

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    Stern cleat to stern cleat under the hull.
     
  17. restless

    restless Captain

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    The new 43 Morgan Bay has custom tabs like the interceptors but with Lenco actuators. You might want to look into it before making a decision.
     
  18. crabz

    crabz Senior Member

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    It even works if your stern has a lot of "over hang" , if the rudder / prop is forward a ways.
    Experiment with rope diameter . Gillnetters do this because you can't have normal trim tabs for the net to catch on .
     
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  19. WoundUpMarine

    WoundUpMarine Captain

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    Anyone have any pictures of the tabs on the new 43 Morgan Bay? Curious how they mated the tabs to those lenco actuators.
     
  20. Thomas

    Thomas Senior Member

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    Thanks never heard of that trick appreciate all the input very interesting
     

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