Efficient Boat Plans with Carolina lines and Down-East Semi-Displacement hull??

This semi-d 17' 500kg sea angling boat has had a long reputation for sea keeping , using anything from 20hp in for pottering around at 7-8 kts to 50-60hp for 25kts.


The new owners have a very misleading web site, this design is not a planing hull , its designed for low hp outboards that transitions to higher speeds without much trim change.

It used to be called a Teal back in the 1970's; can't find it on google

http://www.endeavourboats.com/Endevaour-500/70

 

johnnythefish;

To Tom - in my quest for the perfect boat, I do now remember coming across your website and thinking "wow - I like the sound of this"... better still is the fact that there are some boats built in your style that means there are some real world figures... so a couple of questions...

1) Do you think your boats would be happy far offshore? Operating as a sport fishing boat? They are certainly not designed with that as the primary goal. Bluejackets would handle offshore conditions similar to any boat with the same design ratios. If that were the goal I would raise the chine and drop the keel forward which would reduce accommodation (I assume not an issue) and ease entry into waves. Increased deadrise at 25% WL would be considerably greater than the current 25 degrees. I would seriously look at water ballast that can be easily taken on or let out to suit conditions.

2) Do you have some "real numbers" for fuel burn for some of these boats "trolling" at 8kts? Current Bluejackets have no high fuel burn issues at 8 to 10 knots as evidenced by the photos and my experience. Long term fuel burn at that speed is not certain but cruises of 100 miles or more always work out to less than 2 gal/hr or 6 to 8 mpg with varying speed over the course of the trip.

3) Could the plans be modified to be built as a Centre Console?[/QUOTE] Yes, the bull bottom is a torsion box and that would present no problems.


Of course, what we have here is a different boat but I think it could be a good one. North Carolina Sportfisherman boats have evolved over the years based on the original Rybovich model to go out to the Gulf Stream which is quite far off the Outer Banks in often notoriously difficult conditions. These boats must have trolling qualities as well as get out and back quickly to satisfy fishing customers. It would be difficult to better these designs for most people. The B&B 28 is a good example.

 

Don't forget the first Carolina Sportfisherman Ommie Tillet built: the "Carolinian"

 

The Carolina flare craze came after Omie Tillet's "Carolinian". It got kind of exaggerated but has generally become more moderate these days.

 

I just keep thinking the only way to troll efficiently at these speeds is to move to a catamaran. It was exactly this thinking that lead up to wind up with a TwinVee, it operates at 25+ in fine, but can troll forever at 8kn at just above idle.

 

Tom - thanks for your reply; are the changes you suggest to make the boat more "offshore capable" something that would require redrawing a full set of plans? Would you be interested in doing this?

And would they the negate some of the efficiency qualities that attracted me to the design in the first place?

I wasn't quite sure what you meant at the end of your message about the BandB design - are you basically saying that it would be hard to improve on this for what I want to use the boat for?

 

I try to limit my design "expertise" to areas that I am as sure of as practical and that is primarily high efficiency monohull operation in the lower speed range from zero to 25mph or less with emphasis on the lower end. It is certain that some knowledge of other boating properties find the way in during studies but, at this stage, I would not try to better some other designers that I think have more experience in offshore needs.

Compromises invariably have consequences. So, yes, some loss of low end efficiency would occur.

The Cape Lookout 28 from B&B is the result of a long period of designing and building boats suitable for offshore and bringing that experience into the smaller boats like the CL 28. One that I do have a bit of knowledge of is the Ocracoke 20 and think it would be very good in this size range but perhaps not as capable for further out with the added danger of getting home when really bad stuff happens. None of this means that these boats, including Bluejackets, are not capable of managing very rough seas. The question is, as is so often the case, what shape are the occupants in while the boat is surviving?

 

I've been looking at this design for a while, seems to be a pretty efficient hull.
Seems to tick several of your boxes, the power curve looks pretty linear in your speed range and the position of the engine makes for an excellent place for a game chair and a wide, unobstructed transom to work large fish. Plus, it's just a very pretty boat:
http://bateau.com/studyplans/LB26_study.php?prod=LB26

 

Stumble - you are right - and I am looking long and hard at Richard Woods Skoota's... but they don't have the Carolina look!!

Tom - I really do like the Ocracoke boats - particularly as I like the lines and the flare; and the building method looks like a good way to achieve that. I would have started one ages ago were I not looking for this efficiency at 7-8 kts.

Do you think the Ocracoke 24 or the DE25 on the bateau website would be more fuel efficient in these ranges? I am led to believe that the DE25 has a "variable deadrise hull" - making it better at intermediate speeds - but not as good really really fast.

I am assuming the Ocracoke is a "constant deadrise" - and I wonder how much this will affect the efficiency at trolling speeds?

Typhoon - I think the LB 26 is a lovely boat - and maybe worth some further thought as I was thinking that a single diesel would be a great option.

 

Are there any good plans for a smallish (under 30 foot) Carolina Hull with a single screw diesel?