M.O.R.C. self righting requirements
Hull Speed

And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.

Thanks

For details of the the concepts go to:
http://www.johnsboatstuff.com/Articles/design.htm and follow the
links.

In article , John
wrote:

M.O.R.C. self righting requirements
Hull Speed

And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.

Thanks

Rich Hampel wrote:
For details of the the concepts go to:
http://www.johnsboatstuff.com/Articles/design.htm and follow the
links.

In article , John
wrote:


M.O.R.C. self righting requirements

Multinational Offshore Racing Committee specification as to how well
a boat must right itself after being broached?

Hull Speed

Is that in meters?

An arbitrarily defined number that reflects somewhat generally on
the low speed / drag curve anomaly at what is quaintly called "hull
Speed", a very important concept for those who sail commercially
bearing cargo, which prompts for an investigation of hull form /
drag relationships? Dunno.

Will we discover other anomalies around air / transonic and water /
transonic speeds and harmonic interactions thereafter?

Will they matter much to us common ducks?

And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.


Some numbers that will tell the well experienced something technical
about how well the boat can dump you in the water. Don't forget to
take your laptop in a freezer baggie to calculate how to trim the sails.

I believe the Mariner is self bailing. That means that if you fall
out of it when it dumps you into the water, if you get the sails
down and turn the boat right side up, and if allowed to drain
somewhat, it will bail itself out enough to sail well enough that
the holes in the transom will suck out all of the water.

Provided it doesn't dump you back in the water, again.

It's light and tippy, if you sail it right. Daysailers are supposed
to be like that. The only way to tell if you will like it is to sail
one.

Or am I misremembering again? It is a centerboarder? You don't give
a ballast / displacement ratio.

Terry K

good discription, Ter.

M.O.R.C. self righting requirements

Multinational Offshore Racing Committee specification as to how well
a boat must right itself after being broached?

Hull Speed

Is that in meters?

An arbitrarily defined number that reflects somewhat generally on
the low speed / drag curve anomaly at what is quaintly called "hull
Speed", a very important concept for those who sail commercially
bearing cargo, which prompts for an investigation of hull form /
drag relationships? Dunno.

Will we discover other anomalies around air / transonic and water /
transonic speeds and harmonic interactions thereafter?

Will they matter much to us common ducks?

And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.


Some numbers that will tell the well experienced something technical
about how well the boat can dump you in the water. Don't forget to
take your laptop in a freezer baggie to calculate how to trim the sails.

I believe the Mariner is self bailing. That means that if you fall
out of it when it dumps you into the water, if you get the sails
down and turn the boat right side up, and if allowed to drain
somewhat, it will bail itself out enough to sail well enough that
the holes in the transom will suck out all of the water.

Provided it doesn't dump you back in the water, again.

It's light and tippy, if you sail it right. Daysailers are supposed
to be like that. The only way to tell if you will like it is to sail
one.

Or am I misremembering again? It is a centerboarder? You don't give
a ballast / displacement ratio.

Terry K

JAXAshby wrote:
good discription, Ter.


Gee, A KUDO! Thanks, As! First I remember in this forum, but
considering the source, sir, you do me no reliably benificial or
[-----------------------------------------------------^ sp -tk]
reputable favour, but instead, shake my confidence (a prodigous
accomplishment). Now I must review my response to see what
apparently adopted misconceptions I may have fostered. -TK
;-)


M.O.R.C. self righting requirements

Multinational Offshore Racing Committee specification as to how well
a boat must right itself after being broached?


Hull Speed

Is that in meters?

An arbitrarily defined number that reflects somewhat generally on
the low speed / drag curve anomaly at what is quaintly called "hull
Speed", a very important concept for those who sail commercially
bearing cargo, which prompts for an investigation of hull form /
drag relationships? Dunno.

Will we discover other anomalies around air / transonic and water /
transonic speeds and harmonic interactions thereafter?

Will they matter much to us common ducks?


And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.


Some numbers that will tell the well experienced something technical
about how well the boat can dump you in the water. Don't forget to
take your laptop in a freezer baggie to calculate how to trim the sails.

I believe the Mariner is self bailing. That means that if you fall
out of it when it dumps you into the water, if you get the sails
down and turn the boat right side up, and if allowed to drain
somewhat, it will bail itself out enough to sail well enough that
the holes in the transom will suck out all of the water.

Provided it doesn't dump you back in the water, again.

It's light and tippy, if you sail it right. Daysailers are supposed
to be like that. The only way to tell if you will like it is to sail
one.

Or am I misremembering again? It is a centerboarder? You don't give
a ballast / displacement ratio.

Terry K

gabblygook, at least in the context of selling an O'Day Mariner.

M.O.R.C. self righting requirements
Hull Speed

And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.

Thanks

In article , "John"
wrote:

M.O.R.C. self righting requirements
Hull Speed

And, for a 19' sailboat, what do you make of the following?
Disp./Length 104
Sail Area/Disp 24.8
Length/Beam 2.53

Specifically, it is an ODay Mariner.

FUN boat! Enjoy!

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/