Centerboard Shape and Specs

I am repairing a much munched centerboard and have received a template from FS to help with this. I have visited a website sponsored by Quannapowitt Yacht Club that discusses repair of a FS cenerboard - with pictures. The discussion and pictures present a board that is largely symmetrical fore and aft and presents a conversation with Harry Carpenter indicating the leading and trailing edges have the same profile and shape.

The pattern I recieved from FS matches the basic shape of the board that I have (minus large pieces that the previous owner and I have left on various lake and river bottoms) but does not match the shape of the board pictured in the yacht club article. Does the class sanction more than one board?

John McLaughlin
Customflex #1554

I find it interesting that I have not one reply to this topic. Even the centerboard shown in the official measurement document has a different shape from the template that Flying Scot sent to me to use when redoing my board and an accompanying sketch showing the official lengths and widths has a different shape from the template. The template sent to me has very large radius curves at the termination of the straight foreward and aft edges, while the sketch and measurement specs show a very long straight leading and following edge with very abrupt curves (smaller radius) at the transitions.

John McLaughlin
Customflex #1554

GMcK106's picture

I also need to fix my board.  Where did you get the template?  Is it a .pdf file?




Glenn McKibben  FS# 2602

It sounds like you have the information you need, if you have a template from Harry.

I have never heard of more than one board.


Phil Scheetz
FS 4086

ClarkT is correct that the "spirit of the rule" is what the class is after in older boats: a symmetrical shape. Historically there had been variances in board shapes, particularly among different manufacturers. Also, there was some history of DIY board modifications which changed the symmetry of the foil.

The template received from Flying Scot Inc. represents the symmetrical shape which should be used as the model for centerboard restorations; and is the one used in manufacturing new boats today.

The intent is that there be one board shape for the class; that represented by the template. Any measurements done for competition, such as the NAC, are done on this basis. If a board's foil shape has been modified, it would have to be corrected before being used in the competition. If a board clearly hasn't been modified, but it doesn't match the template, there's a likely judgment that the board may be used.

FSSA Forum editor