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Zipwake, any opinions?

Discussion in 'Stabs, Tabs & Gyros' started by Robertoman, Jan 31, 2023.

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  1. Robertoman

    Robertoman Member

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    I'm not seeing any comments on Zipwake performance. Has anybody run them on a larger boat?
  2. Capt J

    Capt J Senior Member

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    Yes, they work well.......very well and repeatable since the scale is 0-100 on each tab. I have seen a few failures on fairly new boats, but I think because they were not installed properly and the blade was rubbing against the hull.
  3. mapism

    mapism Senior Member

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    Sorry for not being able to contribute, but I hope you don't mind if aside from being interested to following the feedbacks you will get, I would extend the topic also to interceptors in general, not just Zipwakes.
    For instance, I heard folks arguing that the Humphree system is more robust than the Zipwake, but I'd love to hear from someone with first hand experience.
  4. AMG

    AMG YF Moderator

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    We are using Humphree on the Delta 54 and 80 as part of the design, and on all the smaller boats we have replaced traditional trim tabs with Zipwake.
  5. MBY

    MBY Senior Member

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    We use Zipwake on our models and overall are happy with them. They had servo issues early on but lately they have been very reliable. We find on the smaller boats they can be a little over corrective especially with the auto function on. On our 42 they are great, work well and are easy to use. There is a slight learning curve over traditional trim tabs but once you get the hang of them they are a really nice system.
  6. sdonx

    sdonx New Member

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    Interesting I didn't think they were for bigger boats. I have a 40 Cabo. Would love an auto tab system like this for a more economical ride when steaming out to the canyons 100+ miles. I read that they work great with a Seakeeper which I have also.
  7. mapism

    mapism Senior Member

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    I'd be interested to hear more about the behaviour on boats like the D54.
    Did you possibly make any comparisons between traditional trim tabs and interceptors, before adopting them?
    And if yes, how does the effectiveness compare through the whole speed range, including transition from displacement to planing speed?
    TIA!
  8. AMG

    AMG YF Moderator

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    We initially were trying the Humphree interceptors in the combination with IPS at the Volvo Penta Test Centre on another boat, I think it was a Windy 52 with triple 600:s. That boat was healing a lot more than the D54 so the interceptors were very effective to straighten it up.

    On the Delta however we have much less healing and almost no hump speed trim either, so we are mainly using the interceptors to trim down the bow in headwinds, since the bow is very sharp and reduces any slamming. Even without the interceptors the D54 have less than two degrees trim at WOT... Pictured is the Delta 60 Open with the same hull...

    D60 Blue.jpeg
    Capt Ralph likes this.
  9. Capt Ralph

    Capt Ralph Senior Member

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  10. AMG

    AMG YF Moderator

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    Here you can see the interceptors recessed at the end of the shallow tunnels on the Delta 60 Open for outboards (52 knots)...

    D60 Outb.jpeg
  11. mapism

    mapism Senior Member

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    Thanks AMG for sharing your experiences.
    Am I right in understanding (since you didn't mention it) that you didn't make any direct comparisons on the same boat between interceptors and traditional tabs?
    And if so, I suppose that's because you were already sure that the former perform at least as well as the latter, right?
  12. AMG

    AMG YF Moderator

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    Since IPS was a novelty then, we wanted to see if interceptors could be better than trim tabs, as we were told that IPS could create more roll and had zero longitudinal trim. We found that they were reacting faster than traditional trim tabs, especially with auto trim, and they were not protruding if we wanted to fit a hydraulic platform. So the interceptors became a part of the hull design from scratch for us and as I said above, we have now also on the smaller boats replaced trim tabs with interceptors. Especially the 34-footer got a better dynamic with the automatic Zipwake, to my surprise I may add, since I was not sure how they would perform on a stepped hull where you are getting air bubbles vented aft...
  13. sdonx

    sdonx New Member

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    MBY I would be interested in any information you would have on Zipwakes for my 40' Cabo, which seems very close to the 42 Mag Bay.
  14. Capt Ralph

    Capt Ralph Senior Member

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    It is VERY close.
    The same family started both brands.
  15. Capt J

    Capt J Senior Member

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    They work great. The 41' Cabo which is the same boat, has them and they work well.
  16. sdonx

    sdonx New Member

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    Capt J worth the $ and time to install in your opinion. Did you notice and speed/ gph advantage?
    From my online search it looks like material would be <5k. With a fairly simple install.
  17. Capt J

    Capt J Senior Member

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    It helps with the ride a good bit........ you can definately notice that. You can probably get the same speed in most conditions by keeping the boat trimmed properly with the standard tabs but the zipwake is easy to adjust in very small increments as well.
  18. sdonx

    sdonx New Member

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    Nice thanks for the response. I just reached out to the factory for their recommendations. I will let everyone know what they say.
  19. sdonx

    sdonx New Member

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    Working with my local Zipwake/ Imtra rep in my area. They have been super quick to email me back. They recommended a pair of the 600E rather than the smaller S series. It was great as they also sent me a picture of them getting installed on a 41 Cabo. This will take more work for me for the larger size. I will need to put off until next year as I have too many pet projects now.