Click for Westport Click for Seacoast Click for Cheoy Lee Click for Mag Bay Click for JetForums

72 Cheoy Lee RHP Motoryacht info

Discussion in 'Cheoy Lee Yacht' started by bayoubud, Mar 4, 2018.

  1. bayoubud

    bayoubud Senior Member

    Joined:
    Feb 19, 2017
    Messages:
    709
    Location:
    Florida
    We have an interest the early 2000 model 65/72 Cheoy Lee RHP MY. We have looked at one and like the overall design. Quality looked good with all USA mechanical equipment. Information is slim, mostly magazine reviews which are not about how well they hold up overtime. My major concern is the Divinicell foam cored hull below the waterline. Aware that divinicell foam is used by many good builders above the water line, but not savvy as to how well it performs below the waterline. I know this is a controversial subject but cannot find any negative comments of any type or hull failures for these CL models. Any experiences and feedback good and bad are very much appreciated.
  2. YachtForums

    YachtForums Publisher/Admin

    Joined:
    Dec 22, 2002
    Messages:
    19,636
    Location:
    South Florida
    Most premium boat builders use cored hulls. My personal preference is a solid glass hull beneath the waterline, but cored hulls save weight, which equates to better performance and reduced fuel costs. My concern about foam cores stems from impact. The compression of an impact can weaken foam cells, which can be exasperated by water pressure constantly pounding the impacted area, further breaking down cell walls and ultimately causing the skin to delaminate from the foam. If the skin is breached, then hydraulic erosion of the foam can become catastrophic; a worst case scenario.

    While cored hulls are certainly strong, in some ways they are more fragile than solid glass because you are merging different materials. The bonding of foam to a fiberglass skin isn't chemical in nature, but rather adhesive and the best way to accomplish this is resin infusion, something that most boat builders didn't adapt until recent years.

    No matter how well you saturate a laminate, the possibility of delamination remains constant, whereas a solid glass laminate is highly unlikely to separate, even after impact. When a cored hull is subjected to impact, you may not see external damage but there's a probability the core has been damaged, which can weaken the cell walls. Once your core structure is compromised, it is prone to further deterioration.

    If the skin is breached and water penetrates the core, in theory it is suppose to remain isolated in a closed-cell foam environment, however water has a way of seeking channels. With cores such as Divinicell, the kerfs that allow the foam to conform to compound curves leave open channels where water could conceivably flow. Even if water enters at a remote location, in time it can travel throughout a core. This is why resin infusion and vacuum bagging has become so important in the layup process. It is the most effective method of ensuring complete saturation, specifically between the kerfs.

    I just invited Panu Virtanen, the VP of Cheoy Lee North America to join in this thread. I'm sure he can answer any questions you have about their boats, past and present.
  3. CL-Yachts

    CL-Yachts Senior Member

    Joined:
    Feb 24, 2009
    Messages:
    16
    Location:
    Fort Lauderdale
    Thanks Carl. This is Panu at Cheoy Lee Yachts. This particular Fexas design is solid skin hull below the waterline so the topic really is not relevant. If you come across another Cheoy Lee, one with cored hull there should be no concern because the coring used is closed cell foam not absorbing water. All Cheoy Lee hulls are designed by qualified composite engineers based on Classification Society rules. Resin infusion and vacuum bagging takes away any concerns as Carl mentions above. Cheoy Lee is one of the early adapters of the resin infusion method and one of the more experienced builders in that field. You can PM me for more info on the Fexas 65/72 design.
  4. bayoubud

    bayoubud Senior Member

    Joined:
    Feb 19, 2017
    Messages:
    709
    Location:
    Florida
    Thanks for the info Carl and also for bringing Panu in with his expertise.
    Panu, sending a PM.
  5. Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    8,429
    Location:
    Satsuma, FL
    I think this thread brings on the positive of mfg support and what (IMO) Carl has been suggesting for a bit now.
    Thank you Panu for your input and time.
    The lead to PM was perfect.
    I look forward to bayoubud's recap of the private discussion to still be a resource to YF and others looking into Cheoy Lee products.
  6. bayoubud

    bayoubud Senior Member

    Joined:
    Feb 19, 2017
    Messages:
    709
    Location:
    Florida
    rc, have already heard had a rely from Panu, he is confirming the construction details with CL's production manager and will relay info tomorrow. Good support!
  7. olderboater

    olderboater Senior Member

    Joined:
    Sep 2, 2013
    Messages:
    5,765
    Location:
    Fort Lauderdale
    This is a reminder too that when asking questions about older and specific boats, the builder is really the place to go. They do have the information and can give you accurate information. Everyone else is "almost", talking about boats similar or close in size and age or another boat they saw, but can't promise accuracy on a specific boat.
  8. Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    8,429
    Location:
    Satsuma, FL
    Yes, and when the builder can interact on YF, we all can learn and offer a resource to others in the future. This could reduce the " i had a friend of a friend who said.... bla bla".
  9. olderboater

    olderboater Senior Member

    Joined:
    Sep 2, 2013
    Messages:
    5,765
    Location:
    Fort Lauderdale
    Especially when the builder representative clears up the issue in question and does so without launching into a major advertising effort. I felt Panu handled it well.
  10. bayoubud

    bayoubud Senior Member

    Joined:
    Feb 19, 2017
    Messages:
    709
    Location:
    Florida
    Absolutely, Panu was able to confirm the construction details within 24 hours. No coring below the water line on these model during those years. There is some confusing comments in some reviews/articles. The models I was referencing was just at the time Choey Lee started resin infusion and vacuum bagging. The decks and topsides are cored and "vacuum bagged". Had Carl not posted and brought Panu in I would probably have passed. I was not familiar with Choey Lee and had no idea they have support here in Florida. So, thank you Carl and Panu for clearing up my concerns. This what makes YachtForums the best.