Cavitation plates
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Cavitation plates

  1. #1
    Senior Member gregb's Avatar
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    Default Cavitation plates

    Dumb question time, what's the purpose of having cav plates on a jet, even when it has a diverter?

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  3. #2
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    Quote Originally Posted by gregb View Post
    Dumb question time, what's the purpose of having cav plates on a jet, even when it has a diverter?
    Plate serves a great purpose. It allows the hull to be ran at its highest driest point of control. It on takeoff has a push lift effect to assist the hull get on plane quicker. after it helps keep the hull in a better set mode while providing additional ride surface behind the transom for a dryer ride. On upper speed drag boats the plate will receive a lot of temp or heat from the passing water action which further shows its effect.

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    Crazy Eights Brad @ SCJB's Avatar
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    the diverter only works if there's water going through it.

    so like in circle racing, when you are decelerating, you want to push the nose down as you enter the turn. This would be done with cav plates.

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    Quote Originally Posted by Brad @ SCJB View Post
    the diverter only works if there's water going through it.

    so like in circle racing, when you are decelerating, you want to push the nose down as you enter the turn. This would be done with cav plates.
    My Bad... I took it as a Ride plate.
    That's a great answer on the cave plate, except I still argue the fact that it can be done on a jet boat with far less Neg. Drag Force thru nozzle adjustment such as Wilders trim nozzle, which was operated by a shoe controlling an adjustable choke insert with up down nozzle control. He used it for launch control at the drags and had 2-3 degrees down angle of thrust while the nozzle remained in the set position. We made tooling on it produced a few, but like time it passes.

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by gregb View Post
    Dumb question time, what's the purpose of having cav plates on a jet, even when it has a diverter?
    Some hulls seem to like "fixed" plates on either side of the jet , for example on Josh's 16' with the plates at "0" it made the boat "think" was longer and seemed to improve the ride and stability , On Circles as Brad said there enormous handling advantage by on the fly ajustable plates On My Sanger due to its unique bottom design (we belived) it was the only way to tame the boat and make it lake drivable Tom

    Josh's

    Sanger

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    Senior Member sandeggo's Avatar
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    Tom I am curious about these plates. I'm thinking the schiada needs these to get rid of the porpoise. Ride plate adjustments seem futile. Are they through bolted on the angle part or just screwed in? My problem is the false floor I have inside the boat won't allow me to through bolt through the transom or floor. It had the step n trims on it when I got it, but its a whole different boat now. If you could tell me material thickness length and width I would appreciate it.

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