Another 25 Seafari goes under the knife

[cdavisdb]

Mounting your tabs as far outboard as possible might create some unexpected issues. Outboard maximizes their effectiveness, but makes them subject to coming out of the water. Probably not a problem when the boat is running, but at rest, it might noticeably increase the roll. Mine often rolls the outboard hull panel out of the water, especially if it light loaded. You may find that the roll characteristics change in unpredictable ways when the tabs clear the water. I'd be very interested in what you find.

[Blue_Heron]

Originally Posted by cdavisdb

...but at rest, it might noticeably increase the roll. Mine often rolls the outboard hull panel out of the water, especially if it light loaded. You may find that the roll characteristics change in unpredictable ways when the tabs clear the water. I'd be very interested in what you find.

You know, Connor, I hadn't thought about that. The tabs on my other two boats are well outboard, but their chines don't rise much out of the water when rolling at rest. But rather than outboard tabs increasing roll, I wonder if yours are damping roll because they're mounted on the center panel and remain submerged at rest and should provide resistance whether rising or falling.

Dave

[seafari25]

Hey Connor,

Maybe I'm misreading what you said but my tabs are still effective, even when I have her pinned, although I have the extensions. Are you talking about wot, cruise, hull speed or on a drift? It's interesting to learn how other setups perform. I would think your tabs, mounted closer to the keel, would be more effective. I think Dave will be modifying his tabs, similar to my Grandfathers so maybe he wont notice any issues.

Nice work, Dave! Please forgive my ignorance but I have never seen a drain hose attached to the oil pan. We always suck the oil out from the top. Are you able to gravity drain the oil or do you suck from that hose? I guess I'm still stuck in the 70s.

Brandon

[cdavisdb]

I think the tabs do damp the roll, just not sure how much. Mine are mounted on the center panel, but I've never seen them come out of the water. I've been planning to increase the surface area of my tabs in hopes of damping it some more, but $ hasn't allowed yet.

Seafari 25: your tabs are much larger than mine. Yours is what I hope to emulate. My issue is roll when at rest. When moving the tabs I have are fine. When sitting still the boat has more roll than I prefer, still nothing compared to a 233 formula. That hull can develop a snap roll that can just about throw you out of the boat(personal experience). Do you notice much excessive roll in your boat?

[seafari25]

Now that you mention it, yes I do but I haven't been in any other 25* deadrise boats to compare with. I grew up thinking this was normal and the word excessive has never occured to me. Safety is all I feel when on board but my passengers make mention to a roll. I tell them we're on a boat.

Connor, I have never been uncomfortable or scared but also keep in mind, our Seafari is unsinkable...

Brandon

[Blue_Heron]

Originally Posted by seafari25

... I think Dave will be modifying his tabs, similar to my Grandfathers so maybe he wont notice any issues.

Brandon,
I will be modifying my tabs. My extensions aren't as wide as yours, but they do follow the contour of the step in the hull. I'll post pics when I've got them bolted on. I don't know what effect they'll have on roll characteristics at rest, though. Time will tell.

Originally Posted by seafari25

Nice work, Dave! Please forgive my ignorance but I have never seen a drain hose attached to the oil pan. We always suck the oil out from the top. Are you able to gravity drain the oil or do you suck from that hose? I guess I'm still stuck in the 70s.

Brandon

The hose has a cable on the end that attaches to a swivel on the garboard plug. So you pull the drain hose out the garbaord plug and gravity drain it.

Dave

[seafari25]

Thanks Dave, that makes it a lot easier to change the oil. Great idea.

Looking forward to seeing your tab extensions.

[cdavisdb]

Its pretty amazing what you can get used to. I don't even notice anymore how much the boat leans into a turn, but after watching several passengers come unglued, I've learned to warn people.

Its a funny hull, and will do things that, visually, look down right scary, but I've never had the boat feel anything but absolutely rock solid. I'm not quite to the point where I would trust it in anything, but getting close.

[Blue_Heron]

Spent most of the weekend away, but still got some stuff done. I needed to get the boat back on the trailer so I'd have enough ground clearance to install the outdrive. Managed to do it without dropping the boat on the concrete or on myself.







Also got out the hole saw and got to work on my gauge panel.



Planning on a shakedown cruise on the Suwanee River on St. Patty's day if all goes well.

Dave

[77SceptreOB]

Dave,

Nice gauge package selection and layout. All the good ones including a Vacuum gauge....good job. I love gauges!

Good luck on your upcoming shake-down cruise.

P.S. Now put that custom built Teak louvered cabin door on!!

Jim