jersey skiffs and reverse deadrise

[mike hanyi]

Reverse deadrise is nothing new, In fact the boys at our local school are building a 14ft lapstrake motorboat based off of an old 60's design that has a mild case of reverse deadrise, the original drawing shows it, their full scale loftings also showed.
after the molds were setup the teacher thinks its a mistake and ordered battens put on the molds to remove the feature,

does anyone have the new jersey seabright skiff book to show us a picture of this feature so the teacher believes it is a true design and not a mistake?

[eastern270]

http://www.atkinboatplans.com/

try the website above. alot of seabright skiffs.

[Cuyahoga Chuck]

Mike,
There is a Jersey Skiff, a short roundhulled lapstrake racing boat powered by a front mounted automotive engine and a Seabright Skiff, a traditional lapstrake rowing and sailing boat from the 1890's that was documented by John Gardner. They are very different.
Which is it?

[G. Schollmeier]

I have not seen any lines for these early Jersey shore fishing boats that have reverse dead rise. Atkin drew many of his own versions of this hull, like the Rescue Minor, but they are not true Seabright Skiffs.
Gary

[holzbt]

This is a boat I cut up last year. You can clearly see the reverse deadrise or tunnel.

[Thorne]

The excellent Time-Life book _Classic Boat_ has a diagram/drawing of the lines of the Jersey skiff both for sail/row and later as adapted for power -- it might show what you're looking for.

[holzbt]

You're not likely to find this in any but a power model as there is no reason to have this on a sail or row boat.

[Cuyahoga Chuck]

Are what is shown in the pictures the remnants of old JS class raceboats?

[holzbt]

The pic's are of a Verity skiff which is a Long Island boat. I've seen several Jersey boats in my travels which were almost identical in construction and model.

[nedL]

Mike, Yes, this is a real building method that dates back to at least the first half of the 1800's on hte New Jersey shore. There are two basic ways of accomplishing this 'reverse desdrise' effect, there is the "boxed garboard keel" and also the "rolled garboard keel". In the rolled garboard keel, the garboard strake starts out normally at the stem (vertical orientation) and lays down toward a horizontal or flat orientation toward the mid body of the hull, and is then brought back up to a vertical orientation at the back end of the 'box keel'. this is the type of construction that Holzbt posted pictures of, and is the construction used in this Jeralemon skiff built in the early 1900's.


In a "Boxed garboard keel" , the 'box' is formed by the addition of what might be called a triangular shaped plank that starts about amidships and runs aft to the end of the box. This plank is completely in a vertical orientation. The actual garboard plank starts out normally at the stem, lays down to a horizontal orientation toward amidships, and then rises up up along the top edge of the 'box keel'. This picture is of a boxed garboard keel. You can see that the sides of hte box keel disappear forward at the front of the box.


Rolled garboard keel construction was used on both non-power and power boats. I don't remember seeing boxed garboard keels in anything but power boats.


Here is a classic example of a Hankins surf boat with a rolled garboard keel



Here is a a 32 foot pound boat that worked off the beaches of New Jersey that had a rolled garboard keel (I believe this was the last surviving example of the type).

[nedL]

Here is the rolled garboard keel of the 32' pound boat,







Cuyahoga: That is not an old JS race boat. The Jersey Speed Skiffs (JS) are 16' long and have a completely flat bottom. This is the bottom of a speed skiff.


(I never have cared for that term "Sea Bright skiff".)

[nedL]

I sould mention that both rolled garboard and boxed garboard construction can be built with either overhanging transoms or transoms that are flush with the deadwood at the back of the keel.