Jet Jon conversion cavitation

[wlockerb]

I would but my last "test" got lost in the river. This one is getting bolted on beforehand. You think it needs one more smaller layer on the top?

 

[He Reigns]

I am by no means an expert. I will defer that question to ranchero50.

 

[wlockerb]

Final look before it gets glasses and sanded. Wish me luck! Won't be able to do the glass work until tonight but hopefully it works out!

 

[wlockerb]

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[He Reigns]

You could make the bolting holes universal so if this version does not work you can reuse the holes for the next version.

 

[Ranchero50]

Looks pretty good. 5/8 plywood? I'd chuck the smallest piece though, I don't think you'll need it. Been in and out all day...

 

[wlockerb]

I honestly can't remember if it is 5/8 or 1/2 plywood but I think I've got the general idea down. The old desing worked well while going straight but in turns it cavitated a little. Also, I think it slowed my top speed down a little being so big and deep. Hopefully this new one will improve both!

 

[wlockerb]

Well here we go guys. Latest attempt at the spoon. I really hope this works well enough for me to use her this weekend. I will be very disappointed if it doesn't and I'm stuck in someone else's boat. I won't have time to do another before the weekend with work so cross your fingers. Here are the dimensions:
11" wide X 20" long X 2" deep with the fiberglass on her. Cross your fingers everyone!
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Let's take a vote everybody. Who thinks its going to work? Yay or nay

 

[wlockerb]

Finished product after sanding. Time to bolt it on. If this doesn't work I'm going back to the previous design.
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[wlockerb]

One more question here guys before I go ahead and set this on after work. Do I need to cut out the spoon and wrap it around my intake grate or simply set it right in front of it? I'll be doing it after work tonight around 11:00 so any input is appreciated! Thanks!

 

[Ranchero50]

Just try to have a good clean transition. Did you do the water faucet trick? That will tell you how it'll work in real life.

 

[wlockerb]

I guess I'll just have to try it and find out. I would assume that anything is better than nothing right? I mean as long as my transitions are smooth it shjould only improve upon the original flat bottom contour of my boat right? I mean the flat bottom is the main problem with what I'm trying to do correct? This will in the least help to divert air to the outsides of my pump's intake grate and help me get down to the water I think. Anything is better than the ridiculous cavitation issues I was having before with nothing.

 

[wlockerb]

New spoon is on and bolted in. Here are some pics. Letting the sealant setup before I trim the bolts down and glass over it all one last time. I'm not sure if I'll have time to test it before the big fishing tournament this weekend so wish me luck everyone! Please feel free to make any suggestions that might be helpful. I'll take all the help I can get to ensure this thing works.

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[Ranchero50]

I didn't notice them before, but I would flatten or thin the two big ribs that are cut off flush next to the spoon. 3rd pic shows how the spoon may actually pick up any disturbed water at the back edge of the rib and draw it into the pump.

 

[wlockerb]

Good enough. I can do that. Thanks

 

[wlockerb]

Glass on now. I took renchero's advice and cut those strakes farther up to avoid turbulent flow over the spoon. Just need to let it setup and then I can paint and try it out! Wish me luck and here are pics of the progress!
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[wlockerb]

Painted...
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[He Reigns]

How did the new spoon work?

 

[wlockerb]

Don't know yet. I won't have time to test it before the trip so I am crossing my fingers! Work until 11:00 tonight and then I'm finishing packing in the morning and taking off.

 

[wlockerb]

Latest mod (cupholder):
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