New bottom paint study

skennellyskennelly Member Posts: 2,196 ✭✭✭✭
in General Boating Discussions
https://www.cbc.ca/news/canada/nova-scotia/dartmouth-startup-special-hull-paint-study-1.6199466
2002 - 270FV Mag 350 B3
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Comments

  • YYZRCYYZRC Member Posts: 5,139 ✭✭✭✭✭
    edited October 2021
    I don’t think I could do my hull for under $1000 with regular ablative! Too bad this is years away from being a reality. 
    2008 350 EC on Georgian Bay
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  • LaReaLaRea Member, Moderator Posts: 7,763 mod
    edited October 2021
    I call BS.  Even a perfect, zero-friction bottom paint won't improve fuel consumption by 20%.  Fuel cost comes from wave drag and engine losses.  

    And -- reducing underwater noise?  Ferizzle?  Underwater noise comes from the engine and propeller, not the hull.  [EDIT:  After you clean the hull, you don't have to over-drive the engines, so the boat uses less fuel and is quieter.  But you'd get the same result with any type of bottom paint.]

    "Measurements were taken when the hulls were fouled with marine growth, after they were cleaned, and finally, after the hulls were sprayed with the dark grey paint."  Well, if you clean a hull that is crusted with an inch of barnacles, obviously it'll be faster and quieter no matter what paint you apply.  

    Geez, I'm such a skeptic.  But I don't agree with their conclusions.  
    Post edited by LaRea on
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  • YYZRCYYZRC Member Posts: 5,139 ✭✭✭✭✭
    @LaRea - the anti anti fouler. 
    2008 350 EC on Georgian Bay
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  • IanIan Member Posts: 2,866 ✭✭✭✭
    Come on @LaRea, surely this has to be true after getting $2.4M for the study….. :D And it was done in Canada.

    Maybe they got 20% from being encrusted to painted but not clean to painted. But their scale is all wrong, on a ship based on weight and speed you’d not see anything like this.

    Waiting for the 2022 study….

    Regards,

    Ian

    The Third “B”

    Secretary, Ravena Coeymans Yacht Club

    https://www.rcyachtclub.com/

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  • LaReaLaRea Member, Moderator Posts: 7,763 mod
    Baha - you got me. 

    The Canadian government is indeed studying underwater noise, but says it's "mainly generated by propeller cavitation and onboard machinery."  The problem is low-frequency noise from ships in the open waters of the North Pacific.  There's no mention of hull friction noise from lobster boats in Nova Scotia.  

    https://tc.canada.ca/en/initiatives/oceans-protection-plan/understanding-anthropogenic-underwater-noise

    BTW the company presents itself simultaneously as a startup and "a leading Canadian materials engineering firm."  
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  • YYZRCYYZRC Member Posts: 5,139 ✭✭✭✭✭
    They have been “leading” for aboot twenty minutes, eh?!
    2008 350 EC on Georgian Bay
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