On Wed, 16 Apr 2008 09:35:58 -0700, "Capt. JG"
wrote:
"Bruce in Bangkok" wrote in message
.. .
On Tue, 15 Apr 2008 20:07:00 -0700, "Capt. JG"
wrote:
"Jere Lull" wrote in message
news:2008041519282516807-jerelull@maccom...
On 2008-04-15 08:20:21 -0400, Brian Whatcott
said:
On Tue, 15 Apr 2008 12:55:37 +0700, Bruce in Bangkok
wrote:
Are you stating specifically that a sailing boat that loses its mast
is in more danger of capsizing then when the rig was in place?? I
would appreciate it if you could elaborate on this as it was always my
understanding that once the rig was either cut away or retrieved and
lashed on deck the boat rode no worse then it had with the rig in
place.
It was always my thought that once the rig was gone that stability of
the ballasted hull would become slightly better with no weight above
the deck line.
I emphasize that I have no interest in this discussion other then this
single point which is probably of interest to most cruising sailors.
Bruce-in-Bangkok
(correct email address for reply)
There are conflicting factors (as usual): the pro-stability factor is
the considerable mass far from the roll center (called moment of
iniertia) which slows the rate of roll in adverse seas.
The con-stab factor is the increased windage and weight above the
water line.
Brian W
As I read this thread, the mast *might* slow wave-induced roll enough to
prevent a roll-over. Anyone who's taken their boat out without a mast up
can attest that the boat is a lot less "stable".
But such waves don't come without wind trying to roll the boat all on
its
own.
I can only believe that having the mast and remains of sails "up" once
the
boat is inverted would be a distinct disadvantage to coming back up in a
timely manner. Dinghy sailors know how much drag a little bit of cloth
can
create.
--
Jere Lull
Xan-à-Deux -- Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/
Likely true. For catamarans, if inverted, they're more stable upside down.
Of course, this comment might open up a religious war about which one is
better offshore. :-)
Being a bit bored this afternoon - the glue is hardening. My car is
broke and I don't have anything pending for an hour or I'd like to
forward the proposition that Catamarans are the safest type of vessel
to sail. Think about it for a moment.
1. They are stable in either the upright or inverted position
2. Modern Cats have a hatch in the bottom of the hull so it doesn't
make any difference which side up you are you can get in and out.
3. If inverted the strongest part of the boat - the hull - is the
portion exposed to the waves.
4. The rig is pretty simple with only one shroud a side and a head
stay.
5. Cats don't rock so bad so you don't need a gimbel stove, and your
significant other seldom barfs in the mashed potatoes.
6. Cats have big windows so you don't need so many lights.
7. Cats have two separate bedrooms so when you really have a bruhaha
with She Who Must be Obeyed you can go off to the other hull to lick
your wounds.
8. Cats usually have a BIG cockpit which allows you to sit out in the
summer's breezes in the evening and enjoy a cool beverage. It also
allows you to feed the mosquitoes but what the Ha, mosquitoes got to
live too. Living in tune with nature. That's the ticket. Participating
in the Malaria Fever Research Project if also a worthy undertaking.
No, there is no question but what Catamarans are safe, congenial and
in tune with nature. The only way the thinking man will sail.
Bruce-in-Bangkok
(correct email address for reply)
Hard for me to disagree... probably the only major negatives are stowage and
cost, the former of which you have to watch or it'll get out of control and
really slow down the boat. Crew fatigue is a *big* factor for long-distance.
I saw a cat that had screens up around the cockpit, so screw the mosquitos.
When we charter in various locations, we always rent a catamaran... makes
for a much pleasant vacation.
Disclaimer: I own a mono. :-)
Well, one simply advises the Captain that the crew will be limited to
a single "tee" shirt and pair of shorts. Keeps the weight down and
also restricts the use of fresh water, don;t you know?
Bruce-in-Bangkok
(correct email address for reply)