Although that wouldn't explain the W on the sail, would it? I know the Trac-14 was the Windrush 14, but I'm not aware of there also being a Windrush 16 (Aussies help me out here).

In any event, the Windrush logo is shown here:

http://windrushyachts.com.au/

(just the W I believe, not the other part of the graphic that is superimposed.)

So you should be able to figure out if that's what you have. And details of the Trac cats can be found here:

http://www.geocities.com/cctexan99/trac/page3.html

Let us know what you conclusion you come to!

Mark.