T&T: Active Fin Stabilizers

[Dave Cooper]

Terry wrote: An aside re: roll tanks - we considered them but gave up when
we were unable to locate any statistical info on the boat...no lines or any

of the stability data are known to exist, and producing them seemed to be
just one obstacle too many. These kinds of data are essential
to the design of effective roll tanks.>

In order to properly design these tanks for a boat you do need this data. I
too didn't have anything on Swan Song.

It took my wife and I one day to take about 75 data points of the hull
offsets and do the inclination tests all in the water. A bit of a PTA but
certainly not a deal breaker for us in going forward with our tank.

As a side benefit of doing this we have ended up with a nice 3 D model of
the hull that we are working on to do the topsides. Once it is all do we can
watch her on the computer screen and rotate her around. Want a new paint job
or stripe? Bingo it's there. Take a look at what she'd look like ;-)

Cheers

Dave & Nancy
Swan Song