Spoons.... when do you use them ?
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Spoons.... when do you use them ?

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    Resident Ford Nut Sleeper CP's Avatar
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    Default Spoons.... when do you use them ?

    I was washing off a spoon last night and had to say to myself. "oh that's how that works"

    So when did people stop using spoons and on what types of boats was there a benefit ?







    I posted them sideways so the water flow is easier to see. It's interesting that the spoon doesn't have to be deep into the water stream to change the flow path.

    So when and why did they go out of favor, or are there some style of boats that still use them ?

    Sleeper CP
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    TRG
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    Hmmm! interesting how the Keel (Spoon) drops drasticly before it starts its run upwards into the pump housing. dont know too many boats with such an abrupt keel like a spoon in your pics Jon. good topic though!
    After this weekend i have a define revised list of todo's befor summer boating.

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    Nice seeing you Todd.

    I hope one of the smart guys will answer my questions.

    Sleeper CP

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    JRPM/e-PerformanceMarine Squirtin Thunder's Avatar
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    Shape and size of a spoon on each boat will change the intake charge as well as lift and ride attitude. It seems every boat responds differently even from the same manufacturer. I have changed mine quite a few times, trying to optimize the overall performance of the boat. I only go by GPS and seat of the pants, but we (Circle Jets) do run more than a 1/4 mile. I still think I have a bit more work to be perfect.
    Jim & Amanda Rich
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    burnt mexican incorprated mirrorimage's Avatar
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    Quote Originally Posted by toddnjuzz View Post
    Hmmm! interesting how the Keel (Spoon) drops drasticly before it starts its run upwards into the pump housing. dont know too many boats with such an abrupt keel like a spoon in your pics Jon. good topic though!
    After this weekend i have a define revised list of todo's befor summer boating.
    hell ive even heard of some people using a doubble spoon on the keel to load the intake ..... now i understand that a rounded surface { such as a spoon } will act like a suction cup when water flows over it. now { not to jack your thread jon, } does the water increase velocity over a rounded surface or does a back cut shoe do that ????
    WHAT THE HELL WAS THAT !!! !

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    Amber Racing Services BUSBY's Avatar
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    John,

    you're kidding right?

    you've not done the bottom of your boat? If not, don't change it, it seems to be working for you.

    the "bubble" or "keel" or "entry" has to be done right in front of your intake ... otherwise you won't load your pump right.

    why do you think you keep seeing everyones boats on here upside down? for fun?


    I'm sure Bennet might beg to differ if you say people have stopped using the "spoon" effect (as you call it) on jet boats.

    B

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    Senior Member Mike D's Avatar
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    Quote Originally Posted by BUSBY View Post
    John,

    you're kidding right?

    you've not done the bottom of your boat? If not, don't change it, it seems to be working for you.

    the "bubble" or "keel" or "entry" has to be done right in front of your intake ... otherwise you won't load your pump right.

    why do you think you keep seeing everyones boats on here upside down? for fun?


    I'm sure Bennet might beg to differ if you say people have stopped using the "spoon" effect (as you call it) on jet boats.

    B
    Nope we are sanding them flat for the ultimate ride, trying to get them to run nose down. For example I saw a few jet boats running like hydros last weekend at the tommy tribute, must be some trick bottom work there J/K.

    Seriously a tunnel is completely different then a v bottom, so bottoms should be done accordingly. I would think that if you didn`t know what your doing you could get your self in a world of hurt. Putting a big bubble or spoon on your boat without knowing what it will do to the ride attitude of your boat could get ugly.

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    Senior Member DuaneHTP's Avatar
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    Here's an example

    Here's the same boat from a different angle.
    Sleeper, turn the spoon the opposite direction and you will have a more realistic example of the theory.

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    TRG
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    Quote Originally Posted by mirrorimage View Post
    does the water increase velocity over a rounded surface or does a back cut shoe do that ????
    You'd have to ask the "Smart" guys!

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    Quote Originally Posted by Mike D View Post
    Nope we are sanding them flat for the ultimate ride, trying to get them to run nose down. For example I saw a few jet boats running like hydros last weekend at the tommy tribute, must be some trick bottom work there J/K.

    Seriously a tunnel is completely different then a v bottom, so bottoms should be done accordingly. I would think that if you didn`t know what your doing you could get your self in a world of hurt. Putting a big bubble or spoon on your boat without knowing what it will do to the ride attitude of your boat could get ugly.
    Is that how you did your "Ice breaker" of a boat? That can't be bennetts work. Ahoy mate!

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    Quote Originally Posted by DuaneHTP View Post
    [Sleeper, turn the spoon the opposite direction and you will have a more realistic example of the theory.
    If I turn the spoon the other way that would be the inside of the spoon the shape on the bottom of the boat is convex isn't it ? If I turn it over it would be concave wouldn't it ? The water will still flow the same ?

    Sleeper CP

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    Quote Originally Posted by Mike D View Post
    Seriously a tunnel is completely different then a v bottom, so bottoms should be done accordingly. I would think that if you didn`t know what your doing you could get your self in a world of hurt. Putting a big bubble or spoon on your boat without knowing what it will do to the ride attitude of your boat could get ugly.

    The engine is coming out in a week or two and the boat is getting flipped, but I have no intention of putting a "spoon" on the bottom. Ron Segni is going to help me do the bottom so whatever he wants to do it's going to get done that way.

    I just thought the topic would be a learning tool for me and others this Winter.

    Nice talking to you the other day.

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    Quote Originally Posted by BUSBY View Post
    John,

    you're kidding right?

    you've not done the bottom of your boat? If not, don't change it, it seems to be working for you.
    B
    As stated in the other post the boat is going to get flipped in a couple of weeks, it's 22 yrs old and Ron Segni told me "we need to work on it" It's still pretty damn straight with a 5 foot straight edge I can only get a nickle under the straight edge in some places most I can only get a dime under it, but I've been told it can be better. So what do I know ?

    Sleeper CP

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    Seriously off center slowride's Avatar
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    I suppose my tug boat is the hull that needs a spoon the most. A flatbottom, with a tall rise on the intake. I would imagine IF I added a spoon (of some sort), it would:
    provide a little lift to the intake (the LAST thing I need right now without loading the pump better)
    load the pump better
    Granted this boat is a dinosaur and probably not worth the effort, but easily illustrates the principle and benefits
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