looks like torque roll causing this?

[JPriami]

Screw it, Im going to slightly relocate the strut up a hair and towards the starboard side near 1/8". This should help both the torque roll and chinewalk issues from all the setups I have been reading about.


primed & cleaned

2 part epoxy that bonds to plastics really well PC-7 laid out

drilled out the stock stinger bracket holes so I could fill them in with no air trapped because they will need to be moved over as well.

[Make-a-Wake]

Man................this is major renovation to this boat................hope it works out..........

[JPriami]

yeah me too.
Its hard for me to give up on something after already investing so much time into it.
I can get to that point once I feel like I have extinguished all my ideas. But in the mean time I dont have any other hobby projects so it gives me a creative outlet to do things in my spare time.

[Brushless55]

Keep it up bro, I'm really looking forward to this..

[martin]

The Spartan also has a deeper v than most of the good v hulls that we all know & use. Its around 3 degrees different + theirs no ride pad, Any thoughts on this re chine walk. Thanks Martin.

[JPriami]

My other idea I had was to take the tip of the vee off the hull and make it about 1/4 wide flat. Starting about mid ways up the hull towards the transom. That would help wouldn't it by giving a ride pad?

[dag-nabit]

I'm guessing here, I'm no hull design engineer, but....

If you create a flat pad on the vee to run on, wouldn't that increase the tendency to slip out in the corners and/or increase the opportunity for prop walk?

Kevin

[JPriami]

I'm no hull doc either lol. Just brain storming. Scrutiny welcome.

[JPriami]

This article is what gave me the idea.

"A sharp keel cuts through the water and will limit lift. Even sharp keels have limitations. Ride pads integrated into the hull bottom have to be used once you hit speeds in the upper 50-60 MPH range. At this kind of speed even a sharp strake less keel can provide enough lift to cause chine walking. Trim tabs can help but your really fighting against the physics involved and mother nature will win this one! "

Bellow, a picture of a ride pad on Ron Frank's boat"

[JPriami]

I have also read that most all good fast running deep vees the strakes stop before the transom a ways. This boat dosent do that with the outter ones. They go right into the trim tabs. But if the boat isn't riding there i guess that's ok?

This is what I read off the same article above mentioned.
""The strakes are flat riding surfaces that limit the water from spilling off to the sides. As a result they act like ski's. They tend to make the hull ride on top of the water opposed to cutting through it. The further back toward the transom the strakes extend then the bigger the ski (surface area for this to occur). All high speed hulls eliminate the strakes several inches ahead of the transom or eliminate them completely. This allows the hull to lift up to the point where the strakes end. The rounded keel doesn't help much either. As Don says - it's like a rounded ride pad."

[JPriami]

This is how it's looking so far. I'm probably going to leave the stuffing tube hole the size of the tube and seal it temporarily for testing. If it works good I'll make the hole bigger to put the rubber gromet back in so the tray can be removed easier.

[Brushless55]

Oh yeah!

[JPriami]

Hope it works, Ive heard mixed up things about moving the strut over off center of the hull vee.
I guess if it dosent work I can make the hole bigger with a file back towards the center of the hull and put the rubber grommet back in, but the strut will still be slightly higher overall.
Ive also heard that moving it up will cause problems because not as much water will be getting to the prop. im getting wore out with this thing

[dag-nabit]

Looking good

As usual we wait anxiously to hear the results.

Kevin

PS Judging by the diagram of the ride pad, it looks as though the Spartan might benefit from another set of trim tabs on the inside mounts.

[chummer]

Subscribed...

I am interested to see how this works out for you. It's threads like this that make OSE such a great forum!