Fin stabilsation of power cats

TC
Tim Chrisp
Wed, Nov 18, 2009 8:33 AM

Thanks for the contributions , very interesting debate . My cat 13.75 m "
Escape " is a Tenant cat ( since modified by CLD,Lomocean) which has exactly
the good cat characteristics described, Tennant CS hulls , narrow
displacement sections with low fore and aft bouyancy, tankage and engines on
top of the keel and horizontal shafts,  and 2.6 length to beam. Malcolm
Tennant when asked this same question of stabilisation told me to get a
bigger boat ! another prominent NZ` designer interestingly suggested the
same idea that Bob Deering raises here..add more weight aloft and slow the
roll. surely not a sail ? I see Foutaine Pajot with their new 55 talking
about zero roll at anchor/slow speed so either someone has figured this out
or they have simply reverted to much fatter hulls and sacrificed the
economy. Again more experienced people than me seem to say every boat is a
compromise, take the gains and put up with it.

--
Tim Chrisp
0274 988 623

Thanks for the contributions , very interesting debate . My cat 13.75 m " Escape " is a Tenant cat ( since modified by CLD,Lomocean) which has exactly the good cat characteristics described, Tennant CS hulls , narrow displacement sections with low fore and aft bouyancy, tankage and engines on top of the keel and horizontal shafts, and 2.6 length to beam. Malcolm Tennant when asked this same question of stabilisation told me to get a bigger boat ! another prominent NZ` designer interestingly suggested the same idea that Bob Deering raises here..add more weight aloft and slow the roll. surely not a sail ? I see Foutaine Pajot with their new 55 talking about zero roll at anchor/slow speed so either someone has figured this out or they have simply reverted to much fatter hulls and sacrificed the economy. Again more experienced people than me seem to say every boat is a compromise, take the gains and put up with it. -- Tim Chrisp 0274 988 623
GK
Georgs Kolesnikovs
Wed, Nov 18, 2009 12:34 PM

http://www.tennantdesign.co.nz/index.php?page=escape

A good-looking boat, Tim, in a world where so many powercats look like
floating condos.

--Georgs

On 18-Nov-09, at 3:33 AM, Tim Chrisp wrote:

Thanks for the contributions , very interesting debate . My cat
13.75 m "
Escape " is a Tenant cat ( since modified by CLD,Lomocean) which has
exactly
the good cat characteristics described, Tennant CS hulls , narrow
displacement sections with low fore and aft bouyancy, tankage and
engines on
top of the keel and horizontal shafts,  and 2.6 length to beam.

http://www.tennantdesign.co.nz/index.php?page=escape A good-looking boat, Tim, in a world where so many powercats look like floating condos. --Georgs On 18-Nov-09, at 3:33 AM, Tim Chrisp wrote: > Thanks for the contributions , very interesting debate . My cat > 13.75 m " > Escape " is a Tenant cat ( since modified by CLD,Lomocean) which has > exactly > the good cat characteristics described, Tennant CS hulls , narrow > displacement sections with low fore and aft bouyancy, tankage and > engines on > top of the keel and horizontal shafts, and 2.6 length to beam.